Our People

Martin McGrath

Group Managing Director

BEng, C.Eng., MIStructE, MIEI, RCons.EI, DipStructEng.

As Group Managing Director; Martin leads the O’Connor Sutton Cronin Group of Companies. A Chartered Structural Engineer noted for calm solution focus and can do attitude Martin brings broad Consulting Engineering expertise to independently advise clients on strategic engineering decisions. The  focus in O’Connor Sutton Cronin on exceptional quality, attention to detail and looking after our team stem from Martins passion for delivery on projects. Experience on a multitude of very large projects in both the Public and Private sector give Martin a broad expertise to bring to the table in delivery of award winning projects.

Patrick Field

Managing Director M&E

BE(Hons), C.Eng., FIEI, FConsEI, LEED Fellow

As Managing Director of O’Connor Sutton Cronin M&E Ltd. Patrick leads the M&E Division.  A Fellow and Chartered Engineer, Patrick has extensive experience in Energy, Sustainability and Building Services solutions.  Patrick’s passion for driving innovation ensures that all projects are delivered to the highest quality within our award-winning M&E and Energy and Sustainability Departments.

Patrick’s experience spans across multiple low energy and sustainable design projects in all sectors.

Patrick’s zest and ambition persists with his goal as MD to drive OCSC and our clients to a zero carbon future both within the company and across all projects being delivered by OCSC.

Andy O’Brien

Civil / Structural Director

BSc(Eng), DipStructEng, DipProjMgt, CEng MIEI, MIStructE, FConsEI

Andy started his long progression through his structural engineering career as a Junior Draughtsman in Rooney McLoughlin Associates (RMA) Consulting Engineers whilst pursuing a 4-year part time night Technician course in Civil Engineering at Bolton Street. This led to a 2-year part-time Technician Diploma in Civil Engineering whilst gaining valuable knowledge of R.C. and Structural Steel Detailing and Design during the day. As a technician, he carried out full designs of structures for the various regional and head office in RML. He was encouraged by the Directors and was accepted to a full-time degree in Structural Engineer at Bolton Street. Upon receipt of his degree, he then undertook a Diploma in Project Management at Trinity College and is now a Chartered Member of both the Institution of Engineers of Ireland and the Institution of Structural Engineers and a Fellow of the Consulting Engineers of Ireland. He first joined OCSC in 1991.

As a very hands on director, Andy has extensive experience with developer-led projects within the residential/mixed-use apartment and commercial sector. He has also been the lead structural consultant on various renovations and refurbishments of dilapidated buildings, mixed commercial and retail development, hotels and shopping centres. He has also successfully completed a number of large 1 and 2 storey Data Centre projects which are a particular favourite of his.

Brian O’Rouke

Director of Civil Engineering

CEng FIEI FCIArb FCIHT FConsEI

Brian O’Rourke is a Director of Civil Engineering with O’Connor Sutton Cronin. Brian with over thirty years’ experience in Engineering and Construction Management of which over 20 years have been in a senior management role. With qualifications in Civil Engineering, Project Management, Health & Safety, Law, and Arbitration. Brian has extensive experience Contract Administration and in managing and administering large scale civil engineering construction projects. In addition to his engineering background Brian is a Barrister at Law, an experienced Expert Witness and is a Fellow of the Chartered Institute of Arbitrators

Brian Heron

Civil / Structural Director

BE, PGD Cons. Law, PGD H’way & Geo. Eng., MSc, CEng M.I.E.I.

Brian Heron is a Director with O’Connor Sutton Cronin with qualifications in Civil and Bridge Engineering, Health & Safety and Contract Law. Brian has extensive experience of managing multi-disciplinary design teams through all stages of a project’s life cycle on a wide range of civil engineering projects in both the public and private sector including new bridge design and bridge remediation, roads, active travel and public realm schemes. Brian has been responsible for the Project Management, Employer’s Representative, Design Management and Cost Control of projects ensuring successful compliance with client’s brief, budget and timetable.

Anthony Horan

Civil / Structural Director

B. Eng (UCD), Chartered Engineer (MIEI), FConsEI

Anthony leads a team of Civil Engineers and allied professionals. Anthony seeks win-win solutions for Clients and his team focuses on adding value to projects through innovative solutions. Anthony’s philosophy is that a well-rounded Engineer, with a good grounding in construction and design, can always exceed a Client’s expectations with innovative thinking and attention to detail. Anthony leads Civil Engineering Infrastructural project teams and contributes to multidisciplinary teams for large building projects. As a Project Director  Anthony has a track record of delivering infrastructure schemes on time, on budget, and to specification. He is a keen collaborator on multidisciplinary projects, especially in congested urban locations. Anthony has significant knowledge and experience in attaining planning through the various planning processes in Ireland. Anthony is available to advise on stakeholder interactions and public presentations, especially at key project stages. Anthony is very interested in the development of young Engineers and the promotion of Engineering as a profession. If you have a significant project requiring design innovation in Civil Engineering or have an opportunity for the promotion of Engineering Anthony would like to talk to you.

Paul Healy

Civil / Structural Director

BSc(Eng), Dip.Struct.Eng, CEng., F.I.E.I., F.I.Struct.E., F.Cons.EI

Known for his “can-do” attitude, Paul Healy has over 35 years experience in Civil/Structural Engineering within the Built Environment and has been responsible for the successful delivery of a wide range of structural projects in Ireland and the UK. These include hospitals, university buildings, schools, swimming pools, industrial/distribution centers, residential, commercial, airport buildings and bridges. His expertise encompasses the whole construction process and demands of multi-disciplinary teams. Paul has been responsible for Project Leads & Independent Technical review of projects ensuring successful compliance with client’s brief, budget and timetable. Key to his success, Paul is passionate about Excellence & Quality, level of our service delivery and the Carbon+ Sustainability Agenda confronting Engineers. On every project Paul is committed to working closely with the Design Team to ensure Client Brief and Project aspirations are exceeded.

James Barrett, CDir

Finance Director/Company Secretary

BComm, ACMA , CGMA, MIoD

As Financial Director for the O’Connor Sutton Cronin Group of companies, James leads the administration side of the business. James is a Chartered Director from the Institute of Directors in Ireland, a Chartered Management Accountant and has completed the Strategic Leadership for CFO’s course run by Stanford University in conjunction with Enterprise Ireland. James is an experienced professional with strong competencies in leadership, strategy, finance, and risk management and has served on the boards of OCSC entities as Director/Company Secretary since 2002

John Millar

Civil / Structural and Mechanical / Electrical Director

Regional Director (London Office)

BA, BAI, CEng, M.I.Struct.E

John Millar is a Director at O’Connor Sutton Cronin and leads our operations in London. Having joined O’Connor Sutton Cronin as a graduate in1998, he became a Chartered Engineer and then moved to England in 2004 to set up our London Office. His can-do approach and passion for delivering high quality designs has resulted in several awards and enabled O’Connor Sutton Cronin to grow from strength to strength in the UK.  John’s team have delivered several large high-profile developments with values exceeding £500m. Projects vary from Refurbishments to New Builds in the Residential, Commercial, Retail, Hotel, Healthcare and Education Sectors.

Richard Brennan

Mechanical / Electrical Director

BScEng.(Hons), DipEng, CIBSE, CENG, MIEI.

Richard Brennan is a chartered engineer with 25 years experience in the design of heating, ventilation and air conditioning systems for commercial, residential, and industrial buildings.

Richard provides a consistent track record of successfully completed projects from concept to detail design and through to construction testing and handover stage.

Richard has developed an extensive knowledge in energy efficient design of large scale district heating systems for various projects in Ireland the UK & Europe.

Michael O’Reilly

Structural/Civil Director

BSc(Eng), CEng MIEI, FConsEI

Michael O’Reilly is a Structural/Civil Director with O’Connor Sutton Cronin, with a focus on Structural and Civil Engineering design excellence. Michael has a BSc (Eng) Degree in Structural Engineering, Bolton Street. He is a Chartered Engineer( CEng MIEI) and Fellow of the Association of Consulting Engineers of Ireland. He has in 20+ years of consulting experience. Michael is the Honorary Secretary of the ACEI and sits on the ACEI Structures and Risk Committees. Michael has extensive experience in Ireland, UK , Middle East and North African markets. While he is focused on developer led large-scale mixed-use developments both in Ireland and the UK, his experience extends to Public works and design build contracts. Michaels’ goal is to ensure economic designs and advice beyond pure engineering which bring value to his projects and clients.

William Forsyth

Mechanical / Electrical Director

BSc(Hons), PGradDip (Acoustics)., PGradDip(Fire Safety)., PGradDip(Project Management), CEng, MIEI.

William, A Chartered Engineer, has over 20 years’ experience in Mechanical Design and Building Services for a wide range of projects including commercial, healthcare, residential and detention facilities. William has qualifications in Building Services, Project Management, Fire Safety Engineering and Acoustics. William has been involved in many special areas of Building Services provision including sustainable design and the use of dynamic modelling to achieve accreditation for recognised certification including BREEAM, LEED and the Code for Sustainable Homes.

William is and experienced, capable, enthusiastic and proactive Engineer and his professional style is direct, constructive, organised, open minded and good humoured. He enjoys a natural capacity to take the initiative whilst remaining sensitive to Client’s needs and has an appetite for and dedication to work of a technical nature.

Declan Barry

Mechanical / Electrical Director

BSc(Eng), CEng., MIEI, MCIBSE

As a director of the MEP practice, Declan is a Chartered Engineer with almost 20 years’ experience across a diverse range of sectors ranging from Commercial Office Shell & Core and High End Fit-out, Retail, Mixed Use, Residential, Healthcare, Institutional, and Industrial projects. Declan is known as a team player who is highly committed and brings technical expertise, great enthusiasm and a Can Do attitude to all projects. His key focus is to ensure OCSC deliver a high quality product and an excellent service for all our clients with a particular focus on fit for purpose design solutions that are cost effective.

Jeff Sims

Mechanical / Electrical Director

BEng (Hons) ACIBSE,

Jeff Is responsible for the day-to-day MEP operations within the London Office. He comes from an Electrical Engineer background and brings this experience and expertise to all projects, with a particular interest in new technologies with a wide experience in both the residential and commercial sectors he brings this expertise to ensure the engineering solution offered to your clients are cost effective, buildable, and fit for purpose, with particular focus on ensuring project specific solutions are delivered to meet the individual client requirements. This builds on our company ethos of a collaborative working approach with all project teams, with the OCSC ‘can do’ attitude, ensuring the effective delivery of fully coordinated design solutions, that OCSC pride themselves on

Shane Toolan

Mechanical / Electrical Director

BEng(Hons) MCIBSE CEng

Shane is based in our London OCSC office, and is responsible for the day to day management of both our London and Birmingham workforces. He is a member of the Chartered Institute of Building Services Engineers, and has experience in multiple sectors across our Irish and UK portfolios. Shane started his career working for a main contractor & brings an acute understanding of the procurement and construction process, which aids in the successful delivery of schemes for our clients. Shane’s focus is on developing and supporting talent within the business to ensure our continued growth in the Services, Energy & Sustainability Sectors.

David Fletcher

Regional Director (Belfast Office)

BSc(Hons), C. Eng, M. I. Struct. E, MIEI.

As Director of the Belfast Office since it opened in 2004; David leads the Belfast Office team of Civil and Structural Engineers and Technicians. David has worked on projects throughout the UK and Ireland as well as Hong Kong and Australia. This geographical variation and chartership with the Institution of Structural Engineers and Engineers Ireland, gives David the experience to provide technically innovative solutions to award winning projects. David also sits on the IStructE NI Regional Committee and is current chair of the Construction Professionals Council Northern Ireland.

John McBeath

Regional Director (Cork Office)

C. Eng, B. Eng, M.S.c, MIStructE, MIEI.

John McBeath is the director of the Cork Office and is a Chartered Structural/Civil Engineer with over 25 years postgraduate design and management experience. This experience has been gained working in many project sectors in Ireland, United Kingdom and Internationally. Project Sectors include Residential, Commercial, Retail, Educational, Health, Refurbishment, Communications, Pharmaceutical and Industrial projects. A large part of this experience has included working closely with many internationally renowned architects including Richard Rodgers, Norman Foster, Michael Hopkins, Avery Associates, STW, Grafton Architects and RKD Architects. OCSC (Cork) Ltd has been based in Cork for the last 15 years, dedicated to providing the best and most up-to-date advice to architects and clients. We are known for our attention to detail both in exploitation of alternative solutions to problems and for the importance we place on the elegance and efficiency of our design details. Engineering is a mixture of art and science. Concept must always come before calculation – and concepts are developed through collaboration with the whole design team. Our priorities are to the client, the team, the environment, and its people.

Andrew McDermott

Regional Director (Galway Office)

MSc. BSc(Eng). Dip Eng, Tech Dip Eng, C.Eng, MIEI

The Galway office opened in 2004. As Director of the Galway Office Andrew leads all projects in the region. Andrew completed his Degree in Structural Engineering from Bolton Street in 1989 and has worked in the UK and Ireland in Engineering Consultancy. He brings his 33 years of experience to all projects in the office offering cost effective, buildable practical solutions. Andrews design solutions have won awards including the ACEI Design Excellence Award in the past. Andrew has a wide client base including public and private sector clients as well as acting as expert witness.

John Rogers

Regional Manager (Birmingham Office)

BEng, BEng(Tech), CEng, MIStructE, MIEI

John Manages the Birmingham Branch of O’Connor Sutton Cronin. A Chartered Structural Engineer who set-up the Birmingham office in 2018. John has a broad range of experience across public and private sector projects. John brings a calming presence to each project with a focus on attention to detail and an excellent working relationship with clients and the broader design team

Thomas Johnston

Civil / Structural Associate Director

FCIHT, MIAT, MInstLM, Tech IEI, AMICE, AaPS

Thomas joined O’Connor Sutton Cronin & Associates in 1998 and has over 30 years’ experience as a qualified Civil and Structural Technician. As an Associate Director and Senior Project Engineer he has delivered many major construction projects which are inclusive of highway design, transport planning, traffic engineering for development, public realm schemes, commercial developments and office buildings throughout across Ireland and the UK.

Thomas was one of the founding Directors for the Belfast office back in 2004.

Thomas manages and oversees the Civil and Structural drafting departments for the whole of OCSC, this includes BIM, Reinforced Concrete Detailing and production of Revit Models  and CAD drawings. He incorporates his expertise and experience on each project during various stages of scheme development, from planning, detailed surveys, traffic assessments and route selection from detailed design and tender design, through to construction and completion.

He is known for his can-do attitude and ability to problem solve complex issues with simple and effective solutions to ensure program delivery timescales are met. Thomas provides leadership on project management matters together with client care, business development, Health & Safety and Risk Assessment. He has a thorough working knowledge of various types of contracts and their processes and procedures and has a particular interest in project risk management and collaborative working with project stakeholders to ensure risks are eliminated and mitigated throughout the lifecycle of projects.

Thomas is responsible for ensuring that all O’Connor Sutton Cronin (UK and Northern Ireland) Quality Assurance and BIM standards are being implemented. He recently became a Fellow of the Chartered Institute of Highways and Transportation.

Eddie Lyons

Civil / Structural Associate Director

BE, CEng MIStructE, MIEI, RConsEI

Eddie has over 25 years of experience in structural and civil engineering in Ireland. His wide range of experience includes work on public & private projects including educational, healthcare, commercial and industrial with “Tier 1” clients, design teams and contractors. Eddie’s role extends from project tendering to leading the Civil & Structural engineering inputs and is responsible for client engagement and project delivery from project inception to completion. Eddie strives to develop strong working relationships and productive collaboration that provide the “right solutions” that ultimately add value to any given development. Many of the projects involve complex city centre setting including deep basements located close to listed buildings. Recently completed work include excess of 55,000m2 industrial developments, €40m Molesworth Street office development, €40m RCSI NAEB Library, €30m Maynooth University Arts & Science Building, €150m Convention Centre Dublin.

Paul McSteen

Civil / Structural Associate Director

BSc(Eng), CEng, MIStructE, MIEI, RConsEI

Paul is a Chartered Engineer who has gained considerable experience over his 20+ years with O’Connor Sutton Cronin on many varied projects with differing site constraints and construction techniques. These projects included public buildings, healthcare and schools as well as industrial, commercial and residential developments. Paul has a wealth of experience in delivering specific client requirements as part of a client’s design team, client technical advisor or part of a design and build team. Paul’s focus ensures that high quality, efficient and economical designs are produced and delivered for our clients.

Shaun Doody

Civil / Structural Associate Director

BE MSc CEng MIEI MIStructE

Since graduating from UCD in 2006 Shaun has gained considerable international experience in Civil and Structural Engineering. His practice to date consists of a multitude of projects spread across a range of sectors in the industry. From work in Australia where the main emphasis was on large Educational and Industrial projects to London where the objective was Iconic Residential and Mixed-use Developments Shaun has overcome many obstacles and complications during the design of these projects. Shaun has demonstrated excellent design skills and thrives leading multidisciplinary projects. Shaun has been recognised by many other consultants for his can-do attitude and ability to distil complex problems into simple and efficient solutions to deliver the vision of the project on budget and on time. He has extensive experience in the design of all structural materials in many locations around the world offering various challenging loading scenarios including seismic and cyclonic wind loading design whilst working with varying ground conditions. He is a Chartered Structural Engineer with Engineers Australia, Engineers Ireland and The Institute Of Structural Engineers. Within OCSC Shaun leads the Efficiency Task Group where the focus and his passion is on continual improvement of our methods to enhance our product via engaging with the ever-developing markets of software, delivery and visualisation tools

Paul Cassidy

Mechanical / Electrical / Plumbing Associate Director

B Eng (Mech)

Paul has over 14 years of experience working across global, large-scale, cutting edge projects, ranging from Corporate Fit Out to 3rd Level Educational Sectors, Residential, Food/Retail, Pharmaceutical, and Industrial. Paul commenced his career with OCSC in 2008 as a Project Engineer, and through the leadership and guidance of the Management Team, Paul has been promoted rapidly to his current role as Associate Director, leading a team of highly committed, talented and driven Mechanical & Electrical Engineers. Paul’s key goal is to inspire OCSC’s team of skilled engineers to deliver world-class projects for our valued clients. Paul has a great depth of experience and brings his expertise in operations management, strategic planning, leadership, and negotiation skills to every project he is involved in. Paul is passionate about working collaboratively with OCSC’s clients to truly understand their needs and aspirations, and is deeply committed to ensuring delivery through engineering excellence while always focusing on bringing unique and innovative ideas to the table.

Sam Budin

Mechanical / Electrical / Plumbing Associate Director

MCIBSE., CEng., Dip Hydraulic Design

Sam is based in our OCSC London office and is a chartered member of the Chartered Institute of Building Services Engineers (CIBSE). With 17 years’ experience in both the plumbing trade and design engineering, Sam oversees the Public Health side of the business and is responsible for leading our Building Service and Sustainability design teams on a diverse range of projects, whilst providing expert advice on Public Health Systems. Sam has extensive experience delivering quality, coordinated MEP designs, with a focus on practicality, cost effectiveness and environmentally sustainable Design and advice to suit our client’s needs across a range of Sectors. These include large scale residential, Healthcare, Education, Commercial and Industrial. Sam is a strong communicator, with a firm focus on collaboration with the client and entire design team, Sam ensures successful building services solutions are agreed with the relevant parties. Sam’s client relationship management is integral to the growth and success of our London branch.

Eleanor Burke

Environmental Division Manager

BSc, MSc, CSci, MIEnvSc

Choonsiong Voon

Civil / Structural Associate

M.Sc.,B.Eng. (Hons) CEng MIEI IStructE

Dan O’Malley

Civil / Structural Associate

BSc(Eng) MEng CEng MIStructE MIEI

Kevin Brennan

Mechanical / Electrical / Plumbing Associate

BEng(Hons), CEng CIBSE, MCIBSE

As London MEP Associate, Kevin has been responsible for delivering several high-profile commercial and residential developments from concept to detailed design and through to the construction and handover stage. Having joined O’Connor Sutton Cronin as a graduate in 2009, he moved to the London Office in 2010, obtaining qualifications in OCDEA (SAP) and BREEAM, and became a Chartered Engineer in 2021. Kevin has developed extensive knowledge in Mechanical, Public Health, and Sustainability Design in the UK and Ireland with projects varying from New Builds and Refurbishments in Residential, Commercial, Retail, and Hotel Sectors.

Brian Mulligan

Mechanical / Electrical / Plumbing Associate

Mark Damery

Mechanical / Electrical / Plumbing Associate

Hons.Dip EE BSc (Eng) MIEI

Tom Jones

Mechanical / Electrical / Plumbing Associate

Dip EE AEng MIEI

Eamon Prendergast

Mechanical / Electrical / Plumbing Associate

Brian Raymond

Mechanical / Electrical / Plumbing Associate

Brendan Lynch

Mechanical / Electrical / Plumbing Associate

BEngTech, BA, MIEI

Graham Henry

Mechanical / Electrical / Plumbing Associate

MIEI, MSc, BEng

Mark Hopkins

Mechanical / Electrical / Plumbing Associate

MEng (Hons), CEng, MIEI

Elena Olefirenko

Mechanical / Electrical / Plumbing Associate

Patrice McVeigh

Sustainability Associate

MSc, BSc, PG Dip, MIEI, CSci

LEED AP, WELL AP, BREEAM, Fitwel

Derek Connolly

Civil / Structural Associate

BEng, NCEA Dip.Eng, CEng MIEI

Ian Crehan

Civil / Structural Associate

BE, CEng, MIEI, MIStructE, RconsEI.

Niall McMenamin

Civil / Structural Associate

BEng, MSc, CEng, MIEI

Paul Devine

Civil / Structural Associate

CEng, MSc, BSc, BEng, PgDip, DipIOA, MICE, MIEI

Patrick Raggett

Civil / Structural Associate

BE (Civil), CEng MIEI, MIHT

Seamus Doyle

Civil / Structural Associate

BEng(Hons), C.Eng., MIStructE, MIEI

Keith Knox

Civil / Structural Associate

Gavin Mullins

Civil / Structural Associate

CEng MIEI BEng(Hons)

Ciaran O’Meachair

Civil / Structural Associate

BEng(Hons), CEng, MIStructE, MIEI

Mark Hogan

Civil / Structural Associate

BEng(Hons), Dip.Eng, CEng, MIEI

Colin Wilson

Civil / Structural Associate

CEng MIEI

Andrew Cross

Civil / Structural Associate

BA, BAI, MSc, CEng, MIEI, MIStructE

Mark Killian

Civil / Structural Associate

BEng., NCEA, Dip.Eng., C.Eng., MIEI

Conor McCarthy

Mechanical / Electrical Associate

BEng(Hons), C.Eng., MIEI

Brian Farrington

Mechanical / Electrical Associate

Colm McNamara

Civil / Structural Associate

Colm is a structural engineer with 15 + years of experience (three years in Australia, three years in the UK) in a wide variety of building and infrastructural projects including, university buildings, schools, commercial & residential buildings, power stations, sub-stations, mining & water infrastructure facilities, bridge design, and bridge remediation works. Colm has provided the role of Employer’s Representative, Technical Advisor, and PSDP on bridge & water infrastructure projects ensuring successful compliance with the client’s brief, budget, and timetable.