PARTNER. ENERGIZE. DELIVER.
Our FOUNDING
Founded in 1902, Guarantee Electrical was built on a bold promise—our seven founders guaranteed to light the 1904 World’s Fair for an entire year. This unprecedented guarantee became our trademark and has since set the standard for the industry.
Today, Guarantee Electrical is a full-service electrical contractor specializing in preconstruction, electrical engineering, electrical construction, intelligent building systems installation, and quick-response services.
With over 120 years of history, we have grown from a single office in St. Louis, MO, to six branches across Missouri, Illinois, Colorado, and California. As a founding member of the Federated Electrical Contractors (FEC), we also offer nationwide services, extending our expertise across the country.
Where We Are.
Our Locations
5044
PROJECTS COMPLETED IN 2025
122
YEAR HISTORY FOUNDED 1902
6
LOCATIONS
1000+
OFFICE & FIELD
EMPLOYEES
.12
TRIR
.67
EMR
1.6M
HOURS WORKED
IN 2025

OSHA
VPP MOBILE WOBILE WORKFORCE STAR
What we do.
OUR SERVICES
WE ARE GECO.
EMPLOYEE OWNED. ELECTRIC CULTURE.
At Guarantee Electrical Company, every employee is an essential part of our success. As an employee-owner, you contribute to a culture of stability, growth, and pride, where shared responsibilities lead to meaningful rewards.
OUR PORTFOLIO
Guarantee Electrical Company delivers high-quality craftsmanship on projects of all sizes. Explore our case studies to see our diverse experience, and contact us to learn how we can support your next project.
Missouri Botanical Garden – Jack C. Taylor Visitor Center
St. Louis / MO
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Wired for Safety®
With robust systems, dedicated leadership, and a team-wide commitment, we are constantly evolving our safety practices to exceed the highest industry standards. Our Wired for Safety® culture defines how we approach every project, ensuring the safety and success of our team and our clients.






