Mark Davies MCIAT Director at Arc Design


Mark began his working career in both small and large architectural practices learning his art in drawing and detailing of buildings. Mark is passionate about design and brings Passive and Low Energy standards into building design whilst keeping a close eye on the architecture of the practices designs.

Mark is a Chartered Architectural Technologist with Chartered Institute of Chartered Technologists. Mark is also on the Register for Building Surveyors under the Building Control Act 2007 acting as Assigned Certifier on the practice’s portfolio of projects.

Mark regularly writes an expert piece in ‘The Sunday Times’ and ‘The Move’ supplement and he is a regular contributor to other relevant magazine publications.

Brian Davies MCIAT Director of Arc Design


Brian for almost fifty years has been a determined and focused professional who wants to create buildings which lift the spirits of those who live in them.

Brian oversees technical standards and is responsible for ensuring that construction projects become fully operational through providing sound design advice in selecting the best technology methods, materials, and ensuring overall excellent building efficiency through the implementation of low or passive energy standards.

Brian has extensive experience of being involved in the design and construction of new multi-million, residential, commercial and sports/leisure complex projects, as well as house alterations, extensions and renovations including listed building structures.

Brian is a Chartered Architectural Technologist with Chartered Institute of Chartered Technologists and in 2013 he gained the Gold Award from his institute, and in 2016 their practice won two European architectural awards for a unique modern house commission.


Karl is a graduate of Carlow Institute of Technology in Architectural Technology and has experience working on a variety of residential and public works projects. Karl founded Historic Ironwork Surveys in 2013 where he acted as project lead on many Office of Public Works and Dublin City Council projects. Karl’s strength is in project technical design development and production information. He joined Arc Design in April 2014.

Colette Harold Architectural Technologist


Colette is a graduate of Dublin Institute of Technology in Architectural Technology and has a post graduate diploma from Trinity College in Project Management. She has a particular interest in low energy upgrades to existing buildings and was recently awarded a MSc degree in Energy Retrofit Technology from Dublin Institute of Technology. Colette has vast experience working in small to medium sized architectural practices on a variety of commercial and leisure interiors, residential and healthcare projects.



A leading figure in the creative industry, New Yorker Garry’s 30-year career has spanned many disciplines and continents. His style has been described as the “haute couture” of the interior design world and one that exhibits an intelligent use of style, form and function. His natural talent and discerning eye for detail not only helps to distinguish him as an individual but also differentiates his clients from the competition. His diverse experience and innate intuition bring an informed and unique creative flair to all projects.

Paddy Costello Marketing Consultant


Paddy is a graduate of the Dublin Institute of Technology in Business and Marketing. He has helped a wide range of businesses in various sectors grow their digital footprint. Paddy is a firm believer in focus marketing which ensures a very strategic and targeted approach to all messaging and communication to new and existing clients. The world of Marketing is an ever changing landscape and we are delighted to be able to leverage Paddy’s experience and expertise to stay ahead of the curve.



With a proven track record of international sales, business development and sales management, Steven is a results-driven, highly effective Senior Sales, Marketing & Commercial Manager focused on delivering success, sales direction and strategic growth. Steven plays an integral role in providing strategic and sales direction to the future growth and development of Arc Design and is responsible for managing, maintaining and developing the sales-cycle.