Trinity Engineering is a full service electrical contracting firm based in Dublin, offering professional electrical services for every type of building, from upscale residential to commercial and industrial.

After nearly three decades of experience, we bring a wide scope of expertise to your project and the security of providing you with world-class electrical contracting services.

Our project areas include hotels, museums, data centres, offices, shopping malls, hospitals, schools, manufacturing facilities, and logistic units.

Trinity Engineering is a member of Tower Holdings Group, a group of ten independent companies in the United States, Ireland, and the United Arab Emirates committed to providing the highest quality of services across the entire construction industry spectrum.

The group, which is owned and led by Kerryman Kevin O’Sullivan, has built an impeccable reputation for the delivery of large and small-scale projects for more than thirty years in the North American market.


Consultants, Contractors, and Clients, we worked and partnered with over the last five years in alphabetical order:


  • Aecom
  • Arup
  • CJ Falconer Architects
  • Coady Associates
  • EDC Consulting Engineers
  • Henry J Lyons Architects
  • JSA Architects
  • KSN PM
  • MED Building Services
  • Murphy Belton Consulting Engineers
  • Phelan Project Management
  • Randal McDonnell Architects
  • RKD Architects
  • Varming Consulting Engineers


  • ABM
  • B&C Contractors
  • Flynn MC
  • Midland Construction
  • Kilwex Civil Engineering
  • Terry Higgins Builders


  • Department of Education
  • Fingal Co. Co.
  • Lioncor
  • Presentation Sisters
  • Setanta Trucks (Renault Trucks Ireland)
  • Technical University Dublin (TUD)
  • University College Dublin (UCD)