We provide professional facility maintenance and technical trade services in Nanaimo and across Vancouver Island



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Our mechanical and HVAC technicians handle installation, repairs, and performance optimization to maintain comfort, reliability, and energy efficiency.
Comprehensive electrical services provide safe power distribution, upgrades, and maintenance for commercial, industrial, and institutional facilities.
We design and implement building automation systems that connect HVAC, lighting, and metering to deliver better control and performance insight.
Structured preventative maintenance programs extend asset lifespan, reduce downtime, and ensure safe, compliant operation across every facility.
Our plumbing services include installation, repairs, and maintenance to ensure safe, efficient, and dependable system performance.
We deliver structured cabling solutions that support reliable connectivity for automation systems, communications networks, and integrated building technologies.
Our Nanaimo team combines local knowledge, certified systems, and advanced technologies to keep facilities across Vancouver Island performing at their best.
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Local Experts
Regional Experts
A century of experience
A future of innovation
GDI's Story Begins
Robertson Janitorial Ltd. began as a small, reliable cleaning service supporting Quebec City’s growing economic landscape. With a focus on consistency and care, the company steadily grew.
Ainsworth is Founded
Brothers F.C. and C.J. Ainsworth establish an electrical services company that grows into a technical services leader.
Two Leaders Join Forces
GDI acquires Ainsworth, bringing facility and technical services together in one North American organization.