Discover the people behind A.G. Management Service, LTD.

Tim Johnston
CEO/Founder & Tax Professional- Saint Charles Office

Tim Johnston is a founding partner of A.G. Management Service and has been a trusted advisor to clients for over 35 years. He began his career as a farm consultant, helping agricultural operations improve efficiency and profitability. This hands-on experience with small business operations naturally led him into the field of tax preparation, where he now specializes in serving individuals and small businesses. Tim’s deep understanding of both the financial and practical sides of running a business has made him a valued resource for clients across a wide range of industries. His leadership and commitment to personalized service continue to shape the firm’s client-first philosophy.

Hunter Johnston
Director & Tax Professional – Saint Charles Office

Hunter Johnston is a partner at A.G. Management Service and has been preparing taxes for individuals, corporations, and small businesses for the past 8 years. After earning his degree, Hunter joined the family business, continuing the legacy started by his father and helping guide the firm into the future. With a focus on accuracy, efficiency, and client relationships, Hunter brings a modern perspective to tax preparation while upholding the firm’s long-standing values. His dedication to serving clients and expanding the firm’s capabilities makes him an integral part of A.G. Management Service’s continued growth and success.

Jill Ferk
Accountant & Office Manager – Saint Charles Office

Jill Ferk has been a valued member of the A.G. Management Service team for over 7 years. As both an experienced accountant and the office manager of our Saint Charles location, Jill plays a key role in ensuring smooth day-to-day operations while delivering reliable accounting support to our clients. Her attention to detail, organizational skills, and dedication to client service make her a cornerstone of the Saint Charles office. Whether managing workflows or assisting clients with their accounting needs, Jill is committed to maintaining the high standards of professionalism and care that define A.G. Management Service.

Patti Merchlewitz
Office Administrator & Bookkeeper – Saint Charles Office

Patti Merchlewitz is the newest addition to the A.G. Management Service team, serving as the Office Administrator and Bookkeeper at our Saint Charles location. With a strong background in administrative support and financial recordkeeping, Patti brings a fresh perspective and a detail-oriented approach to her work. She plays a vital role in keeping the office running smoothly and assisting clients with accurate and timely bookkeeping services. Patti’s organization, professionalism, and positive attitude make her a great fit for both our team and the clients we serve.

Larry Axelson, CPA
Senior Tax Professional – Wanamingo Office

Larry Axelson brings over 40 years of experience in tax preparation and accounting. As a Certified Public Accountant, Larry has built a reputation for providing reliable, detail-oriented, and personalized tax services to individuals and businesses alike. Based in our Wanamingo office, he combines decades of expertise with a deep understanding of local and federal tax regulations to help clients navigate even the most complex financial situations. Larry’s longstanding commitment to client service and integrity makes him a trusted advisor in the community.

Shannon Schaefer
Office Administrator & Bookkeeper – Wanamingo Office

Shannon Schaefer serves as the Office Administrator and Bookkeeper at our Wanamingo location. In addition to managing daily office operations and providing dependable bookkeeping support, Shannon also handles payroll processing and quarterly filings for a variety of clients. Her strong organizational skills, attention to detail, and commitment to accuracy make her an essential part of the team. Shannon’s ability to manage multiple responsibilities with professionalism and efficiency helps ensure smooth operations for both the office and the clients we serve.