Staff Directory

Guinn, Vinopal & Zahradka, LLP has been providing tax and accounting services to Western Wisconsin for over 30 years. Our core values have provided us with a strong client base and long-term relationships expanding across generations. We strive to be more than just an accounting firm by providing the services you need when you need them.


Jason Zahradka, CPA
Almena & New Richmond

Jessica Keopple, CPA
Almena & New Richmond

Tim Bergman, CPA

Amanda Linehan, CPA
River Falls



Byron Dopkins,  Retired ManagerJoe Vinopal, Jr., Retired PartnerBradley Guinn, Retired Partner


Meet the Partners

Jason Zahradka, CPA, Managing Partner, works with business start ups, tax planning and preparation, and performs audit and review services. Enjoys golfing and spending time with his wife and daughters. Jason is a licensed CPA in the state of Wisconsin and is a member of the AICPA and WICPA. Email: Office Location: New Richmond

Jessica Keopple, CPA, Partner, prepares tax returns for individuals, partnerships, corporations, estates and trusts, and non-profits. She performs audit and review services and financial statement compilations.  Jessi is a licensed CPA in Wisconsin and is a member of the AICPA and NATP. She is ready to tackle any accounting problem you have! Enjoys spending time with her two children and husband, playing darts and downhill skiing.  Email: Office Location: New Richmond

Tim Bergman, CPA, Partner, works with start-up and closely-held businesses and their owners providing them with accounting, tax, and consulting services.  He prepares income tax returns for individuals, corporations, partnerships and non-profits. Tim also assists clients with tax planning, financial statement compilations and QuickBooks services.  He is a licensed CPA in Wisconsin and enjoys spending time outdoors, boating, and golfing.  Email: Office Location:  Hudson

Amanda K. Linehan, CPA, MBT, Partner, works with small to mid-sized businesses and their owners in the areas of tax compliance, tax planning, accounting assistance, and business strategy.  She especially enjoys getting to know her clients’ businesses, which in turn, helps her plan more proactively for the business and the related individual owners/shareholders/partners.  Amanda has a Bachelor’s Degree in Accounting from UW-River Falls and a Master’s in Business Taxation from the University of Minnesota.  Amanda enjoys all that the St. Croix Valley has to offer with her husband and young son.  She is an active board member of the River Falls Chamber of Commerce and often volunteers to help with the Chamber’s many community events throughout the year.  Email:  Office Location: River Falls


Bradley E. Guinn, Retired Partner, specializes in business planning including mergers and acquisitions, tax planning and preparation. He also specializes in income taxes for farmers and self-employed individuals.  Brad is a licensed CPA in the State of Minnesota and a member of the Wisconsin Association of Accountants. Email:   Office Location: New Richmond

Byron Dopkins, EA, Retired Manager, Specializes in individual and small business tax planning and preparation.  Has been a practicing accountant since 1977.  Byron is enrolled to practice before the Internal Revenue Service.  He is a member and former President and Executive Director of The Wisconsin Association of Accountants, also a member of the National Society of Accountants.  He enjoys hunting, fishing, and golfing.  Email: Office Location:  River Falls

Joe Vinopal, Jr., ATP, RTRP, Retired Partner, continuing to work as Manager, Notary Public, specializes in individual and small business tax planning and preparation. Has been practicing accounting since 1972. Joe is a member of the Almena Business Development Corporation, Almena Commercial Club, Wisconsin Association of Accountants, and the National Society of Accountants. He enjoys outdoor activities including hunting, fishing, golf, and boating.  Email: Office Location: Almena