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John Ackerman: johna@mbacorp.net     (414) 881-1514

John started in this industry in 1989 working in the wholesale end of the business.  His financial knowledge keeps MBA’s future secure in the uncertain global economic roller coaster.  His marketing expertise allows MBA to bring our manufacturer’s products to market in a timely manner.  John’s product knowledge across the variety of industries we serve makes him valuable in both inside and outside sales.



Mark J. Krumnow, P.E.:  markk@mbacorp.net     (414) 702-0685

Mark, a Professional Engineer started in the industry in 1979.  Mark has experience on the manufacturing side of the business in all aspects of residential, commercial and industrial HVAC, Indoor Air Quality, lighting, security, product manager, and performance contracting. Abilities developed include design, troubleshooting, seminars, competitive analysis, and commercial proposals. 

Mark brings 30 years of electronic and HVAC control experience. This experience enhances MBA’s ability to offer professional product seminars and system designs.



Phil Hrenak: philh@mbacorp.net     (920) 212-0450

Phil started in this industry in 1987.  His experience ranges from inside sales and service at the wholesale level to being out in the field as a contractor.  Prior to starting at MBA Phil was the Hyrdronic’s manager at major multi location wholesaler.  His expertise includes Forced Air, Hyrdronics, Refrigeration, GEO, Solar and seminars. This experience and skill set makes Phil a valuable outside salesmen for our organization.




Brad Hess:  bradh@mbacorp.net    (262) 757-3468

Brad started in the industry in 1995.  Brad spent his early years on the contracting side in both HVAC and plumbing.  His experience on the contracting side had exposure to new construction, existing retrofit, and service work.  Brad took his experience on the contracting side, and applied it to several years in the wholesale distribution side in both HVAC and plumbing.  While spending time in wholesale distribution Brad had different positions over the years ranging from branch management, outside sales, and design.  Brad’s experience helps in supporting contractors, wholesale distribution, performing seminars, and meeting with engineers.



Patti Race: pattir@mbacorp.net     (414) 481-0505

Patti started in this industry with a manufacturer in 1993. Communication skills, general office, and computer knowledge allow Patti to provide strong support for both MBA’s customers and manufacturers. Patti offers technical expertise, accurate pricing, and on-time delivery to better serve our customers.







Renee Tezak: - reneet@mbacorp.net     (414) 481-0505

Renee is starting in this industry with a background in electromechanical applications, sales and training, along with management systems customer support.  Teamwork, computer knowledge and communication skills provide strong support for both MBA’s customers and manufacturers. Renee and Patti offer technical expertise, accurate pricing, and on-time delivery to better serve our customers. 


















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Serving the Wisconsin and Upper Michigan

HVAC, Plumbing, Geo and Solar industry for over 57 years.

(414) 481-0505

Office and Warehouse