We provide dependable facility maintenance solutions in New Haven and throughout South Central Connecticut.

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Our janitorial services use structured routines and trained oversight to keep your building clean, compliant, and inspection-ready.
Office cleaning programs follow your workflow, supporting organized, productive spaces without interrupting daily operations.
With deep extraction and refinishing methods, our floor and carpet cleaning protects surfaces and preserves appearance.
Our disinfection services use hospital-grade products and targeted applications to reduce pathogens and support healthier environments.
We provide window washing and building maintenance that protects exterior materials and maintains a polished, professional look.
Through our Integrated Facility Services, we connect cleaning, maintenance, and reporting to strengthen efficiency and accountability across every site.
Partner with a team committed to clean, safe, and dependable facilities across South Central Connecticut. Contact us to build a facility maintenance program tailored to your operational needs, with clear accountability and consistent performance you can rely on.
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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.