GDI Ainsworth delivers trusted facility maintenance and technical services across Markham and the Greater Toronto Area.



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Specialized teams handle installation, repairs, and performance tuning for mechanical and HVAC systems, improving comfort and reducing energy costs.
Our electrical services cover design, upgrades, and maintenance of power and lighting systems to keep operations efficient and compliant.
With advanced building automation systems, we integrate HVAC, lighting, and metering controls for smarter, more responsive facility management.
Our energy management services identify savings, reduce emissions, and support sustainability initiatives using data-driven analytics and IoT tools.
Through design, build, and engineering expertise, we provide turnkey project execution, from concept through commissioning, with precision, safety, and code compliance.
Our Integrated Facility Services streamline multi-trade operations, aligning all technical maintenance under one partner for consistent performance and accountability.
Our teams combine technical excellence with responsive service and proven systems to keep Markham’s buildings efficient, safe, and compliant.
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Local Experts
Anne Nicholson
Director of Operations
Calen Sansom
Director of Sales
Regional Experts
Marco Ottavino
SVP Eastern Canada
Randy Carr
SVP Service & Maintenance
Randy Topp
SVP Energy Services