ICON Engineering has a long list of satisfied customers. Client contacts and other references are available on request.

Public Sector

Both as ICON and while doing business as the Colorado branch office of Greenhorne & O’Mara, we have completed a wide range of projects for federal, state, county, city/towns, and special districts. Our work is primarily in Colorado, but has included assignments in Wyoming, South Dakota, Nebraska, Iowa, Minnesota, Utah, Texas, and New Mexico. Recent project experience with such clients as…


Corps of Engineers, FEMA, General Services Administration, National Highway Institute.


Colorado Department of Transportation, Colorado Land Commission Board, Colorado Water Conservation Board, State of South Dakota, Wyoming Water Development Commission.


Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas, Eagle, Elbert, Grand, Jefferson, Larimer, Logan, Mesa, Prowers, Routt, Summit.


Aurora, Arvada, Blackhawk, Boulder, Brighton, Broomfield, Castle Rock, Cherry Hills Village, Colorado Springs, Columbine Valley, Commerce City, Cortez, Denver, Eagle, Elizabeth, Evans, Federal Heights, Fort Collins, Frisco, Golden, Grand Junction, Greeley, Greenwood Village, Kiowa, Lakewood, Loveland, Manitou Springs, Morrison, Northglenn, Parker, Sheridan, Sterling, Thornton, Vail, Victor, Westminster, Wheat Ridge, Woodland Park.

Special Districts

East Cherry Creek Water and Sanitation, Elizabeth Parks and Recreation, Goldsmith Metropolitan District, Green Valley Ranch Metropolitan District, Highlands Ranch Metro District, Inverness Water and Sanitation District, Jefferson County Library, Lowry Redevelopment Authority, Metro Wastewater, SEMSWA, Urban Drainage and Flood Control District.


Adams County District 14, Aurora Public Schools, Colorado School of Mines, Denver Public Schools, East Grand (Granby), Jefferson County Schools.

Private Sector

Our impressive list of private sector clients includes many of the top names in consultants, engineers, and architects. We have completed assignments for national and local land development clients, the oil and gas industry, and construction contractors. Representative clients have included…


Anderson Consulting Engineers, Applied Design Associates, Architerra Group, ASI, Barker Rinker Seacat & Partners, Bates and Associates, Bell Surveying, Bock & Clark, Design Concepts, DHM, ERM, GEI, Golder Associates, Ground Engineering Consultants, J.A. Casare Associates, J.R. Harris & Company, LONCO, Meurer Associates, MDG & Associates, Oz Architects, Pahl Pahl Pahl, Paragon Consulting Group, Slater Paull Associates, Richard P. Arber Associates, Richard Weingardt Consultants, Rocky Mountain Consultants, S.A. Miro, Wenk Associates, Winston Associates.

Land Development

Alpert Companies, Arby’s, AutoZone, Chateau Communities, Chateau Custom Builders, Founders Village, Fuddruckers, Garfield Investments, Gates Corporation, Greentree Homes, Inverness Properties, Koelbel and Company, McDonalds, McStain Enterprises, Metropolitan Builders, OPUS Northwest, Pentax, Public Storage, Rocky Mountain Mutual Housing, Target Stores, Suburban Lodges, Waste Management of Colorado.

Construction Contractors

Adolfson Peterson, BT Construction, Canonie Environmental, Grimm Construction, Kemp and Hoffman, L&M Enterprises, Proto Construction, RBI, Roche Constructors, Territory Unlimited, Tierdale Construction, Valley Crest Landscaping, Weitz-Cohen, Western Summit, William Brown.

Oil & Gas

Basin Exploration, Coates Field Services, Gerrity Oil & Gas, KN Energy, Meridian Oil, Renegade Oil & Gas, Rothman Oil, Snyder Oil, Ultramar Diamond Shamrock Vessels Oil & Gas, WillSource.