About Us

Meet the Agronomists from MAX Agronomy
John Mackson

John Mackson


John Mackson started in the agronomic consulting business in 1979. MAX Agronomy LLC is providing soil fertility and health advice on over 100,000 acres throughout the state of Michigan.

John graduated from Michigan State University with a  B.S. in Agronomy and currently holds 3 industry certifications including, CPCC-I from both the National Alliance of Independent Crop Consultants and from the American Society of Agronomy; CCA, Certified Crop Advisor; and CPAg, Certified Professional Agronomist. MAX Agronomy LLC is also a member of the Amplify Network.

John Koenig

John Koenig

John Koenig is a very enthusiastic and driven individual bringing over 14 years of agronomic experience to MAX Agronomy. He has earned both a BS degree in Agronomy and MS in Plant Pathology from the Ohio State University and a CCA from the American Society of Agronomy.

His agronomic experience started young working alongside his father and grandfather on their family farm in Northwest, Ohio. Professionally he has experience in agricultural education/ FFA advisory, soil sampling data interpretation, turfgrass management, plant pest diagnostics and management, fertilizer recommendations and consumer product development including fertilizer, herbicide, fungicide, insecticide, wetting agents and combination products. Other research projects included water quality assurance and carbon sequestration.

John aspires to become an innovative leader in the agricultural industry, promoting the safe and proper usage of fertilizers and pesticides in efforts to maintain a sustainable ecosystem while increasing  grower profitability.

John looks forward to providing consulting services in soil fertility, water quality and on-the-farm research to the Michigan agricultural community.

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