MSA is proud to recognize the accomplishments of employee owners Aaron Eicher, Ben Marschall, Jake Winker, and Rusty Zimmerman who recently earned Professional Engineer licensure in the state of Wisconsin.

New Professional Engineers at MSA (L to R): Aaron Eicher, Ben Marschall, Jake Winker & Rusty Zimmerman
To earn a PE license, engineers must hold a four-year degree in engineering from an accredited engineering program, work under a professional engineer for at least four years, pass two intensive competency exams and earn a license from the state licensure board. PE licensure is the engineering profession’s highest standard of competence – a symbol of achievement, assurance of quality and commitment to ethical standards of practice.
Aaron Eicher, PE, is a project engineer on MSA’s mechanical, electrical, and plumbing (MEP) team, and is based in Madison, Wisconsin. Aaron joined the firm in 2023 and has over 10 years of experience in HVAC, plumbing, fire protection, energy management, and energy systems design in the industrial food, commercial kitchens, and wastewater industries. He earned a bachelor’s degree in Mechanical Engineering from the University of Wisconsin-Platteville and is a member of the American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) as well as the American Society of Mechanical Engineers (ASME).
Ben Marschall, PE, is a project engineer on the firm’s Public Works team. He joined MSA in 2023 and is based in the firm’s Madison, Wisconsin, location. Ben has over seven years of experience including the preparation of construction-ready plan sets and stormwater management design for industrial, residential and commercial projects nationwide. Ben earned bachelor’s degrees in both Civil Engineering and Environmental Engineering from the University of Wisconsin-Platteville.
Jake Winker, PE, joined MSA’s Public Works team in 2022 and has over five years of experience in municipal, stormwater, and development projects, including street improvements, utility replacements, construction observation, commercial and residential developments, and trail design. He holds a bachelor’s degree in Environmental Engineering from the University of Wisconsin-Platteville and is based in MSA’s Mequon, Wisconsin, office location.
Rusty Zimmerman, PE, is a project engineer on the firm’s Land service line as part of the agricultural services division. He joined MSA in 2021 and has over six years of engineering design experience supporting water resources design projects, agricultural engineering design projects, and WPDES CAFO permitting. Rusty earned a bachelor’s degree in Bioproducts and Biosystems Engineering from the University of Minnesota and works from the firm’s Mequon, Wisconsin, office.
“I’m pleased to congratulate Aaron, Ben, Jake, and Rusty on attaining PE licensure,” commented Mike Statz, chief operating officer at MSA. “This is a significant professional milestone and proof of dedication to integrity and quality of work. Each of these individuals is an integral component of our company’s success and I look forward to watching them continue to grow and thrive in the years to come.”
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