Dan Pfeifer

Chief Executive Officer



Value Delivered

As Illingworth-Kilgust Mechanical’s Chief Executive Officer, Dan works with the company’s leadership team to attain 100% client satisfaction in providing mechanical, plumbing, and HVAC services. Actively involved in all day-to-day operations, he helps ensure delivery of the high-quality HVAC products, systems and services clients need to meet today’s complex and demanding challenges. He also oversees Illingworth-Kilgust Mechanical’s development of new technologies and techniques, always striving to provide customers with even higher levels of reliability, performance and efficiency.


Dan has more than 30 years of HVAC services industry experience. Starting as an apprentice, he leveraged his steadily expanding commercial heating and cooling expertise into roles of increasing responsibility. In addition, he has supplemented his work experience with career development and continuing education programs that have helped round out the skills he needs to successfully manage Illingworth-Kilgust Mechanical’s diverse group of professionals.

The Personal Side

Dan and his wife enjoy traveling and spending time with their two sons, daughter in-laws, and their three year old granddaughter Haley. Dan enjoys a good round of golf especially near their summer lake home where the family enjoys Wisconsin weekends on the water.