Clients
Below is a partial list of past and/or current clients:
| Private Clients | Public Clients |
| Abbott Laboratories | Chicago Park District |
| Belt Railway Company of Chicago | City of Beloit |
| Blank, Wesselink, Cook & Associates, Inc. | City of Chicago, Department of Aviation |
| Camp Dresser & McKee, Inc. | City of Chicago, Department of Environment |
| Chicago Community Trust | City of Crystal Lake |
| Clarion Development Inc. | City of Highland Park |
| CTA/Environmental | City of Madison |
| Gardner, Carton & Douglas | City of Milwaukee |
| Golf Enterprises, Inc. | City of Watertown |
| Hamilton Financial Group | City of Woodstock |
| Home Depot | City of Waukesha |
| Hyatt Development Corp | DuPage County Public Works Department |
| Knight Architects Engineers Planners, Inc. |
Fox Lake Inland Lake Protection and Rehabilitation District |
| Landrum & Brown | Illinois Department of Natural Resources |
| Mackie Consultants, Inc. | Illinois Department of Transportation |
| McDonough Associates Inc. | Illinois Division of Water Resources |
| McMahon Associates, Inc. | Illinois Environmental Protection Agency |
| Meridian Development, Inc. | Lake County Forest Preserve District |
| Mills Corporation | Milwaukee County |
| National Audubon Society | Milwaukee Metropolitan Sewerage District |
| National Survey & Engineering | Mundelein Parks and Recreation District |
| Otis Associate, Inc. | Northeastern Illinois Planning Commission |
| Parsons Engineering Science, Inc. | U.S. Army Corps of Engineers |
| Patrick Engineering | U.S. Environmental Protection Agency |
| Prentiss Properties Limited, Inc. | U.S. Fish and Wildlife Service |
| R.A. Smith and Associates | Village of Germantown |
| S.C. Johnson & Sons | Village of Gurnee |
| Scarsdale Homes | Village of Mundelein |
| Sears, Roebuck and Co. | Village of Northbrook |
| Smith Engineering | Village of Palatine |
| Stein and Company | Village of Riverwoods |
| The Prime Group | Will County |
| The Wetlands Initiative | |
| Town & Country Homes | |
| Towne Development | |
| Wedgewood Partners | |
| Western Development Corporation | |
| Westfield Homes, Inc. | |
| Wetlands Research Inc. |