About Our Company
E-21 is a fully-insured corporation that provides services to the top 500 corporations, financial institutions, major contractors and governmental agencies at all levels.
As a professional company, and as individuals, we strive to provide excellence in our service to our clients. To us, our occupation and our service are personal as well as professional.
Our Key Team Personnel
Sergius Hanson, P.E., P.G.
Founder of E-21 Construction, LLC
Paul Gottler, P.G.
22 Years at E-21 Construction, LLC
13 Years at E-21 Construction, LLC
12 Years at E-21 Construction, LLC
We have a wide range of services. E-21 personnel has been involved in over 2,000 projects, for all types of clients, including a heavy emphasis at aerospace facilities.
Government - All Levels
US Air Force, Buckley AFB
US Air Force, Cheyenne Mountain AFB
US Air Force, Schriever AFB
US Forest Service
US Bureau of Land Management
US Department of Agriculture
Colorado Department of Health
Colorado Division of Oil and Public Safety
Counties of Adams, Denver, Jefferson and Weld
Cities of Aurora, Denver, Englewood, Glenwood Springs
Arapahoe-Douglas Mental Health
Aurora, Denver, and Littleton Public Schools
Industrial and Aerospace
Lockheed Martin Space Systems
US Air Force, Buckley Aerospace Data Facility
Waste Management of North America
Rocky Mountain Bottling Company
Tri-State Generation and Transmission Assoc.
Amoco Oil Co.
Valero Energy Company
K&G Stores, Inc.
Trammel Crowe Development
Jon Cook Properties
Phil Long Ford
Construction - General Contractors
Hensel Phelps Construction Co.
W. E. O’Neil Construction
J. E. Dunn Construction
G. H. Phipps Construction Co.
LVI Services, Inc.
Sturgeon Electric Company, Inc.
Apollo Mechanical Contractors
Bank of Colorado
Equitable Real Estate
Bank One Commercial
General Electric Capital Corp.
Republic National Bank