Our Team

Jeff Maertin


Our founder and leader and a really good man.  Jeff passed away on May 28th, 2016, following a stroke after knee replacement surgery.  Jeff had a penchant for quality and friendly service to his customers, who he considered family.  He leaves a legacy of honesty and integrity.  

Scott Maertin

General Manager

Scott was appointed General Manager of the Company June 1, 2015. He joined Maertin Heating in 1996, starting in the Installation Department, and has since sought every opportunity to learn more about HVAC and commercial refrigeration equipment, and the company can proudly say they have a technician in Scott that can repair anything. Scott and his young family live in the Lincoln-Way Area and we consider him an expert in design and installation of home comfort systems.

Mary Maertin

Operations and Customer Support Specialist

Mary is the wife of Jeff Maertin (Owner) and has been with the company since its inception in 1992. Mary heads the customer support team; she is responsible for all follow up with our customers, along with account management, marketing and community outreach.

Sandy O’Reilly

Customer Service/Dispatch

A Lincoln-Way area resident, Sandy is charged with making sure our technicians service your equipment when it’s convenient for you. Sandy manages our maintenance agreements, and scheduling. Hers is the friendly voice you hear when you call our office.

Mike O’Rourke

Service Leader

Mike works in our service department and does preventive maintenance, troubleshooting, and repair on your heating and air conditioning equipment.   Mike is EPA certified.

Richard Lewis


Rich works in our installation department and does preventive maintenance, troubleshooting, and repair on your heating and air conditioning equipment. A 2013 Lincoln Way Graduate and New Lenox Resident, he enjoys the outdoors, animals (dogs especially) and gaming.

Rob Balek

Service Technician

Rob works on our installation and preventive maintenance teams, assuring the quality installation of your heating or cooling system, as well as preserving the life of your equipment by following the ASHRAE-recommended guidelines for a/c and heating maintenance.  Rob received his EPA Certification from Prairie State College, having completed the coursework for HVAC Service Technician.  He enjoys fishing in his spare time.

Jennifer Maertin