James Fitzpatrick Chief Executive Officer

Jim is Chief Executive Officer of Madison Environmental Resourcing Inc, (MERI), an infectious and hazardous waste disposal company located in Madison, WI. Jim has led the MERI company since 2008. He helps customers resolve medical waste issues as he shares his knowledge of how to handle, transport and dispose of a wide range of biohazard and hazardous materials. He is a member of the Wisconsin Healthcare Engineering Association and serves on the Healthcare Waste Committee for the National Waste & Recycling Association. Jim not only has experience in the medical waste field, but in several industries including pulp and paper, paper converting and power plants. His engineering and operations background allows him to find creative solutions to solve problems. He has been successful at improving the performance of business units and starting up new plants. He has three degrees – Executive Master of Business Administration, Bachelor of Science- Industrial Technology and an Associates Degree in Applied Science – Electro Specialist. Jim is married, has four children, and enjoys boating, biking, woodworking and fixing things.


Caleb Kitzerow Sales Account Manager

With a degree in Sustainability Management from UW Stout, Caleb is committed to sharing innovative waste reduction strategies. He tailors waste pickups that help organizations save money, run efficiently and compliantly. Because he works everyday with the UW System and the owners of MERI, Madison’s three Madison hospitals, Caleb has specific insight into the healthcare industry. He is current on RCRA and DOT hazardous certifications, and can work with you on some of your toughest problems to come up with a cost-effective solution. When he’s not meeting with clients, he is usually found on the slopes or on his racing bike.

Tammy Greiber Sales Account Manager

Tammy Greiber’s goal is to make sure MERI provides the most cost-effective solution to your medical waste disposal needs. She works with both our existing and potential customers to make sure they are getting five-star service from MERI and provide additional services as needed.  Tammy may look familiar to you if you live in Waunakee area — when not at MERI she coaches track at Waunakee High School and teaches fitness classes at the community center.

Lisa H. Clark Sales and Marketing Manager

Lisa enjoys working alongside MERI’s dedicated team members who strive everyday to keep our costs low so that our customers can dedicate their financial resources to patient care. She coordinates MERI’s sharps disposal mailback program to help small medical waste generators save money. Lisa uses her experience in public relations, content marketing and event planning to stay abreast of the latest medical waste news to share with MERI clients. And, she organizes MERI’s hazardous training certification programs. She holds a journalism degree from Northern Illinois University.

Richard Zacharias Sales and Customer Service Associate

Richard has been a member of the MERI team for more than 30 years, so if you have a question about the proper way to dispose infectious, pharmaceutical, hazardous chemicals or universal waste, he’ll likely have the answer for you! Connect with him on Linked In today! Zac takes pride in servicing and helping organizations find the most cost-effective solution for their medical waste streams. One of the things he likes best about MERI is its focus on customer service, with no minimums or monthly fees, as well as free biohazard containers and bag liners. Zac co-founded the Wisconsin Association of Incinerator Operators.