Guarantee Electrical Company

PARTNER. ENERGIZE. DELIVER.

When you partner with us—or build your career here—you gain the power of a team that stands behind every project with pride, commitment, and a guarantee of excellence. We are your trusted partner for turnkey electrical construction, systems integration, and rapid response contracting.

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.

Men Discussing Work

Where We Are.

Our Locations

Serving customers across the US, we’re proud to bring quality solutions right to your community!

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

Guarantee Electrical Company is a leader in designing and constructing advanced electrical and building management systems, offering comprehensive solutions from preconstruction to maintenance and upgrades. With offices in Missouri, Illinois, Colorado, and California, and as part of the International Federated Electrical Contractors (FEC) network, we deliver expertise across North America.

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.

TESTIMONIALS

I have had the pleasure of working with Guarantee on multiple projects, and they consistently deliver top-tier electrical work. Their commitment to quality, safety, and efficiency is evident in every aspect of their work. They have a highly skilled workforce that takes pride in their craftsmanship, utilizing technology and prefabrication to maximize productivity without compromising excellence. Most importantly, they operate with integrity—doing exactly what they say they will.

Tim Gunn

Vice President, Construction, Alberici

Guarantee Electrical has been a cornerstone partner that we can always rely on with our best clients. From installation quality and their meticulous attention to detail, to their unwavering focus on safety, Guarantee Electrical has consistently delivered work that meets the highest standards.

What truly sets them apart, however, is their ability to seamlessly manage the complex demands of each job. A great company is not defined by the easy jobs – it’s defined by the hard ones. Their team is always proactive in identifying potential issues and addressing them before they become problems, keeping the projects on track and safe.

Deko Devins

President & CEO, Azimuth Energy

Guarantee was an exemplary building team partner, embracing an array of building technology programs that facilitated schedule, material procurement and workforce management. Guarantee’s engineering solutions ensured reliable power/communication systems and resolved electrical issues in imaging rooms. On a busy construction site packed with other trades, Guarantee effectively managed thousands of manhours safely.

Chris Viviano

Principal, Northstar Management

Guarantee’s involvement in Missouri’s first of its kind Design Build wastewater treatment plant project was integral to the overwhelming success. From estimating conceptual designs, to design asssistance, to starting up the facility ahead of schedule, they proved to be a true partner in assisting my company, Goodwin Brothers.

Doug Wachsnicht

Vice President, Goodwin Brothers Construction Co.

Guarantee Electrical has done a great job providing CU Boulder a Superintendent that listens to his clients. I have worked with John [Crump] for around 7 years and he provides great direction on big and small projects. His team of guys on campus really know our campus and how to get work done with occupied spaces.
Trisha Hallerberg

PM & FF&E Specialist, University of Colorado at Boulder

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