USA PRODUCT AND TEAM

The Maxunitech North American team has a broad range of experience in the agricultural arena and are able to offer you the finest generic crop protection products directly from the manufacturer.

We make it, we ship it, you get it. It’s as simple as that.

Vivian Chen
Chief Operating Officer

Vivian’s career began with ExxonMobil Corporation after graduating with a master’s degree in accounting. During her 20+ years with the company, she transitioned to various business areas including project management, manufacturing, R&D, and global IT operations. Her roles escalated from Project Accountant to a multi-billion dollar Project Controller, representing ExxonMobil in all aspects of accounting, controls and processes, business support, and joint interest operations. As Controls Advisor to the largest refinery in North America, she oversaw contract compliance, risk assessment, accounting and corporate policies, and achieved satisfactory corporate audits. As part of the global IT management team, Vivian led ExxonMobil accounting and IT procurement teams from five continents in developing accounting structures to effectively and timely record IT expenditures from over 100 countries and to support corporate planning.

Ms. Chen admires the entrepreneurial spirit of passion to build something great from nothing, optimism to all possibilities, willingness to take calculated risks, and excellence in execution. “At Maxunitech North America, Inc., as we gather diversified talents in researching and developing new products, we strive to provide our best products and service to our clients,” said Ms. Chen. “This is an exciting journey to a chapter of my career.”

Andrew Seitz
Marketing/Business Development

Andrew has an extensive background in agriculture. In 1988, he began his career as an intern with Rhone-Poulenc which quickly evolved into a full-time position working with the Missouri agricultural market. He later relocated to work with the Alabama and Florida markets and then moved to the Research Triangle Park in North Carolina working with the ag market in the Western United States.

Andrew’s professional career includes living in England working with the Rhone-Poulenc. He has held various management and leadership positions with Rhone-Poulenc, Aventis, Bayer Crop Science, Valent and NuFarm and has managed multiple product lines including herbicides, insecticides, fungicides and PGR's for various crops.

Andrew is committed to providing distributors with the most cost effective, generic agricultural products with an established supply chain delivery system benefitting distributors and their growers throughout North America.

Brad Hyman
Vice President Sales, North America

Agriculture has always been a key part of Brad’s life all the way back to his childhood. While in college at Texas A&M University, he managed the Dairy’s research herd, which led him to serve at the Houston Livestock Show. After graduating, he began a 20-year career working for the Texas-based agriculture chemical distributor, Estes Chemical beginning in support roles at the branch office and moving up to sales, branch management, district management and to Vice President of Sales & Marketing over the crop protection business.

He was later recruited by Australia-based global chemical manufacturer Nufarm. His 12-year tenure there included managing the U.S. Crop Protection business for the past six years.

Agriculture is at the very heart of Brad’s life, not just through his career but also on his family farm and ranch in Franklin County Texas. He looks forward to continuing his work in the agriculture industry offering Maxunitech products across North America.

Jeff Martin

After graduating from Cornell University with a Bachelor of Science degree in Ornamental Horticulture, Jeff began his career working in the Greenhouse, Nursery, and Lawn & Garden segments serving as Manager of New Business and National Sales Manager. Jeff continued to enjoy a long tenure with organizations including Whitmire Research labs, BASF, The Context Network, ADAMA, and now with Maxunitech NA. His roles have included Business Unit Manager, New Product Development Manager, Director of Corporate Licensing, and Director of Asset Management.

Jeff’s focus across all these roles has been on building businesses, brands, effective teams, and technology transfer. His relationship with Maxunitec began as a customer and he eagerly joined the team looking forward to serving the organization and our customers.

Jeffrey Ma

Head of International Corporate Development | Head of International Legal CEO – Maxunitech North America, Inc. & Maxunitech Do Brasil Ltda Location: New York, NY

Jeff serves in dual roles as both the head of international corporate development, responsible for Maxunitech’s growth strategy in international markets, as well as the head of international legal, where he advises management and staff on all legal aspects of international operations. Jeff has extensive experience spanning the mergers and acquisitions lifecycle, with a specific focus on cross-border transactions and complex regulatory markets. Prior to joining Maxunitech, Jeff was an associate in the Mergers and Acquisitions practice at a large corporate law firm in New York.

Paul Lyon

Director US Sales

Paul earned a degree in Agricultural Economics from Mississippi State University and has built a distinguished career spanning nearly four decades across the U.S. agriculture industry. A Mississippi native, he launched his career with Cargill, Inc., where he managed grain facilities in Iowa, Alabama, and Georgia before advancing to the company’s Export Division as a Grain Merchandiser. He later transitioned into agricultural chemical industry, serving in national sales and marketing leadership roles with notable organizations including Ciba-Geigy Corporation, Micro Flo Company, Nufarm, Tacoma Ag, and Summit Agro USA. Paul continues to contribute his expertise to the industry through service on the MSU College of Agriculture and Life Sciences Agricultural Economics Advisory Board and as a Board Advisor for Delta Grain Company.

George Scherer

Western Regional Manager

George started his agricultural career in Central Idaho raising cereal grains, alfalfa, and canola. After getting in Bachelors Degree in Biology he transitioned into a seed salesman and crop advisor in the Moses Lake and Yakima Valley. He then went on to becoming a manufacturers representative for Valent. George then went on to becoming the purchasing Director for Simplot Grower. Solutions, where he held several management roles. After a lengthy career with Simplot, he went on to Kop Coat Protection Products as Director of Sales, where he built a sales team that launched innovative technologies into the agricultural arena. George joined Maxunitech in 2024 and continues to cover the Midwest and Northwest markets.

Tyler Glennon

Eastern Regional Manager

Raised in a family deeply rooted in agriculture, Tyler has built a career focused on delivering results-driven solutions for distributon. After beginning his career with Helena Chemical Company, he moved to Fresno, CA, to establish the regional presence for OrCal, Inc. In 2015, he joined Glennon Enterprises to represent a portfolio of leading manufacturers in strategic market development. Tyler joined Maxunitech in 2025, where he continues to provide innovative solutions and value to customers nationwide.

Tina Ma

Customer Service Specialist

Tina is dedicated to ensuring a seamless experience for Maxunitech North America clients. With a strong analytical background, she utilizes her unique combination of technical expertise and customer focus to provide data-driven solutions. Her approach allows her to understand client needs deeply and streamline service operations. Outside of work, Tina is an avid tennis player and skier.

Andrew Seitz

Marketing / Business Development

Andrew has an extensive background in agriculture, beginning his career in 1988 with Rhone-Poulenc. Over the decades, his work has spanned the Missouri, Alabama, Florida, and Western U.S. markets, including an international posting in England. He has held management and leadership positions with Aventis, Bayer Crop Science, Valent, and Nufarm, managing diverse product lines including herbicides, insecticides, fungicides, and PGRs. Andrew is committed to providing distributors with cost-effective generic products and establishing robust supply chain delivery systems across North America.