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1904 World's Fair
Legendary Innovation
Guarantee Electrical helped demonstrate the miraculous applications of electricity to a global audience when they illuminated the 1904 World's Fair and "guaranteed" that an almost impossible job would be done right and done on time. Today, we continue to build on our legacy as a national leader in electrical engineering, preconstruction, construction, technology and project management. We’re helping to redefine the roles of electrical contracting in an age of ever-expanding technology and ever-evolving project delivery.
 
1902
Guarantee Electrical Company is founded to electrify the 1904 World’s Fair in St. Louis. The name “Guarantee” resulted from the unprecedented one-year installation warranty the seven founders offered World’s Fair organizers.
1926
Fred Oertli Sr., father of Guarantee, joins Guarantee as a laborer.
1928
Fred Oertli Sr. learns the principles of electricity and the National Electrical Code and becomes Guarantee’s one and only estimator. He attends Washington University in St. Louis at night to earn his degree in electrical engineering.
1942 
The Emerson Electric Manufacturing Company selects Guarantee to perform a $2 million installation at its new turret plant to support the war effort at 8100 Florissant Avenue in St. Louis.
1949
Guarantee moves its offices from downtown St. Louis to 4161 Gravois in South St. Louis.
1955 
Guarantee is awarded the Weldon Springs Atomic Energy facility and Granite City Steel’s $16 million hot strip mill installation.
1962
Guarantee is selected to perform electrical work for the 800,000-square-foot facility for McDonnell Aircraft Corporation’s “Gemini” program.
1962
Guarantee is a founding member of the Federated Electrical Contractors (FEC).
1981
Guarantee moves its headquarters to Bent Avenue Industrial Park in South St. Louis.
1999
Guarantee joins the exclusive list of electrical contracting firms performing more than $100 million in services during a single fiscal year.
2002
Guarantee celebrates its 100th anniversary. 
2003
Guarantee acquires Denver-based Kimsey Electrical Contracting, including an industrial contract with Valero Oil Refinery in Benicia, California.
2004
Guarantee acquires St. Louis-based voice/data/video installer TEL-Vi Communications.
2005 
Guarantee completes work on Alberici Constructors’ corporate headquarters in St. Louis, Missouri, and achieves LEED Platinum certification.
2005
Guarantee launches an employee ownership transfer plan, setting plans in motion for 100 percent transfer by 2012. It consists of two components – a Key Management Stock Purchase Program (KMSPP) and an Employee Stock Ownership Plan (ESOP).
2006
Guarantee makes its first contributions to the firm’s ESOP.
2009
Guarantee achieves record revenues of 180 million dollars, the ESOP becomes the largest single shareholder and Gary M. Neal is elected Chairman of the Board.
 

Founded in 1902, Guarantee Electrical first showed the world what electricity could do by illuminating the 1904 World’s Fair, and then “guaranteeing” that it would work when electrification was in its infancy. Today, we continue to build on our legacy as a national leader in electrical engineering, preconstruction, construction, technology and project management.
 
 
Our Offices
St. Louis MO
314.772.5400
Granite City IL
618.452.6122
Denver CO
303.373.2400
Benicia CA
707.745.7445
 
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