Now a part of the Dillon Consulting Limited team


As of March 1, 2020, we are pleased to announce we have merged with Dillon Consulting Limited

About ONSA

F.C. O'Neill, Scriven and Assoc's Limited (ONSA) is a consulting engineering and design firm which specializes in the Electrical & Mechanical Building Sciences and Fire Protection Engineering. More »


Our Work

The engineering requirements for commercial and industrial development in Atlantic Canada vary widely. Indicative of the Company's ability to meet... More »



ONSA designs mechanical and electrical infrastructure for a wide variety of building types and clients utilizing a wide range of project delivery methods. More »