David Wixon and Associates
- Stained glass studio specializing in the design, construction, installation, restoration, remodeling and removal of church and residential stained glass, nationwide.
- http://www.wixonartglass.com/

Anderson & Fiene, Ltd.
- Structural engineering consulting firm featuring past project information, services offered, employment opportunities, and professional qualifications and background.
- http://www.andersenfiene.com/

LZT & Associates, Inc.
- Provides architectural, planning and engineering services. Case studies, past projects, awards and recognition featured. Offices in Peoria and Glen Ellyn.
- http://www.lzt.com/

Control'd Engineering Supply Co., Inc.
- Wholesale distributer of heating, radiant heat, air conditioning, and refrigeration supplies; features maps with locations in Glen Ellyn, Lake Bluff, Crestwood, and Rockford.
- http://www.controld.com/