The Practice

We are an independent engineering firm providing consulting services throughout the UK and Ireland.

Caldwell is a full service MEP engineering resource. We work alongside the pioneers of the built environment to create buildings and spaces that enhance the lives of those who use them.

Brian D Caldwell founded the company in 1966. Brian was an influential figure in shaping the urban landscape in towns all over Northern Ireland. Today, our headquarters are still based in Belfast, though our teams work all over the UK and Ireland.

Delivering at the highest level is our number one priority. Standards, not scale, create the momentum that drives us forward.


Image Credit: Jason Hawkes


We are a multidisciplinary team with expertise across MEP, BIM & 3D modelling, sustainable energy design, process engineering, project management, lighting design, as well as lift & elevator consultancy and extended fire and acoustic engineering.

As our clients’ needs evolve so do our capabilities. Though our teams are located throughout the UK and Ireland, individual projects are overseen by a director to ensure productive and reliable results.

Mark Taylor


Managing Director

Engineering and Environmental Services

Contact Mark

M 077 7933 8394


Mark joined Caldwell in 1988 and gained extensive experience in all aspect of the consultancy business before being appointed as Director in 2004.

He currently works between London and Belfast and continues to be highly involved in project delivery. Recent projects include the W Hotel for Starwood, 140,000 sqft Portman Square Office for British Land and Tuffnal Apartments for Taylor Wimpey. Mark supports the building services industry having served as CIBSE NI Secretary for over 10 years and a member ACE NI Special Interest Group for the past 6 years.

John Watson


Managing Director

Engineering and Environmental Services

Contact John

M 077 7933 8395


John joined Caldwell in 1990 and gained extensive experience in all aspect of the consultancy business before being appointed as Director in 2004. He currently works between London and Belfast and continues to be highly involved in project delivery. Recent projects include the 500 bedroom Novotel / Ibis signature development for the Accor Group in Blackfriars, the 701 bedroom Premier Inn at Gatwick North Terminal and a 700 bed student accommodation at Stratford for Unite Student Housing.

He currently works between London and Belfast and continues to be highly involved in all of Caldwell project delivery.

Marc Burns

BEng (Hons) MIET


Engineering and Environmental Services

Contact Marc

M 079 7702 7538


Marc began his employment at Caldwell after graduating from Queen’s University Belfast in 2002. He was appointed as an Associate in 2008, Associate Director in 2013 and Director in 2016. His particular speciality is in the hospitality and commercial office sectors.
Recent projects include the extension of the listed Merchant Hotel in Belfast, a 300 bedroom Hampton by Hilton in London and the conversion of a former magistrate’s courthouse into a 5 star hotel in Shoreditch.

David Shearer


Associate Director

Engineering and Environmental Services

Contact David

M 077 7332 2731


David joined Caldwell in 1984 and gained extensive knowledge of all aspects of the consultancy before being appointed as Associate Director in 2007. He currently works in our Belfast office and continues to be highly involved in project delivery. Projects include Loch Ryan Port Cairnryan for Stena Line, modernisation of Linkspan facilities for P&O Ferries in Cairnryan, Hatston Pier in the Orkney Islands, refurbishment of the SS Nomadic in Belfast’s Titanic Quarter, the award winning Graham Headquarters in Hillsborough and a Priory Special Needs School in Croydon London designed to meet the needs of students with learning difficulties.

David is our Quality Director and an incorporated member of the Association for Project Safety. He also provides a Principal Designer role for the practice.

Alan Geddis


Associate Director

Engineering, Energy, Sustainability and Information Services

Contact Alan

M 077 3326 2778


Alan joined Caldwell in 1996 Alan has considerable experience in building services ranging from initial liaison with clients to delivery of cost effective and innovative projects of all sizes. His focus within the company is to promote innovative and sustainable solutions, not only in the Building Services field but working with the whole design team.

He is a registered Low Carbon Design Consultant, BREEAM Assessor, Low Carbon Energy Assessor and is qualified to submit for the maximum Level 5 dynamic simulation modelling for SBEM Carbon, Footprint, Thermal Simulation, Daylight, Energy, Etc. Alan also coordinates the BIM strategy and overall IT approach and integration for the practice.

Gavin Kelly


Regional Director – North West

Engineering Services North West

Contact Gavin

M 078 5469 1456


Gavin heads up Caldwell’s North West Regional activities having set up the Derry office in 2007. Based in Derry, he has delivered several key projects throughout Ireland and the UK. Gavin started with Caldwell in 1999 and rapidly gained a post at senior management level. He was heavily involved in the refurbishment of Lough Erne Resort ahead of the G8 2013 International Summit, including the new spa, pool and leisure suite.

Current projects include process engineering commissions for several of Northern Ireland’s leading manufacturers including the new £5m extension to Ulster Carpets.

Paul O’Neill

MEng (Hons) MIET

Senior Associate

Engineering & Environmental Services Vertical Transportation

Contact Paul

M 077 0854 8886


Paul graduated from Queens University Belfast in 2007. He subsequently commenced employment with Caldwell in 2008, taking up the role of Associate in 2014 and Senior Associate in 2017. Paul is involved in various engineering and managerial aspects of the practice and has delivered various high–profile and complex projects across market sectors. His current primary focus is on large scale commercial developments on the UK mainland, recent examples of which include a 10,000sqm BCO Compliant Office development in Maidenhead; the largest Premier Inn Hub Hotel to date at Kings Cross, London (400 beds), the restoration of the historic Cadogan Hotel, Chelsea for Cadogan Estates and Belmond; and the restoration and extension of the Grade II Listed Magistrates Court at Tower Bridge into a 5* Boutique Hotel.

Paul also has a particualr interest in Vertical Transportation and heads up our lift planning and dynamic simulation team.

Jacqueline Edwards


Accounts Manager

Business Services

Contact Jacqueline

M 028 9069 9720


Jacqueline joined Caldwell’s in 1979 holding various administrative roles before being appointed Accounts Manager in 2004. With over 30 years service she has extensive knowledge and experience in the overall financial management of the company.

She currently works from the Belfast Office alongside the Directors and Associates to manage all aspects of the financial and business services.


Career opportunities

We are currently looking for a range of building services professionals to strengthen our MEP Design Teams. Please call 028 9069 9720 or email to arrange for an application form and/or an informal chat.


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