McDonough Mechanical Services, Inc.

Yesterday and Today...

McDonough Mechanical Service Company was established in 1976 by James L. McDonough. In 1983, a small group of investors with a combined 50 years experience in mechanical specialties and trades acquired the mechanical division and started McDonough Mechanical Services, Inc. Since then, we have earned a renowned reputation for superior mechanical and HVAC services.

Why Choose Us

  • We are one of Northern Illinois' most successful mechanical contractors.

  • Our skilled professionals share values and visions that make us a leader in HVAC services. 

  • Our high standard of quality workmanship while ensuring a safe and healthy work environment is strictly adhered to.

  • We apply the safety program defined by OSHA standards and employ OSHA safety certified and CPR certified personnel.

  • Our technicians are union-trained professionals guided by experienced managers.

  • We are a team of expert designers, engineers, programmers, and sales professionals.

  • McDonough Mechanical Services, Inc. has become a powerful force in the HVAC industry.