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about Us
We believe a key component of a strong and lasting relationship is trust. Our professionals strive to build this trust through continued involvement with you and your organization. By combining our expertise, experience and the energy of our staff, each client receives close personal and professional attention.
  • Our primary goal as a trusted advisor is to be available to provide insightful advice to enable our clients to make informed financial decisions. We will answer all of your questions, as they impact both your tax and financial situations.
  • We welcome you to contact us anytime.

Experts in Our Business

Jerrad Honstad, Partner CPA
  • Credential & Education: Bachelor of Arts in Accounting from Augsburg University. Licensed as - Certified Public Accountant;
  • Member: Minnesota Society of Certified Public Accountants (MNCPA) & American Institute of Certified Public Accountants (AICPA)
  • Years in the fields: Have been with Honstad, Dieser & Mangskau, P.L.L.P. since Dec 2009 and became a partner in January 1, 2022
  • Experience: I have experience in a wide range of services, including Corporate, Partnership, Individual income tax, Farm tax, Trust & Estate tax. Clients are the number #1 priority and will give them 110% each time.
Doreen Dieser, Partner CPA
  • Credential & Education: Bachelor of Science in Accounting and Business Administration at Winona State University. Licensed as - Certified Public Accountant
  • Member: Minnesota Society of Certified Public Accountants (MNCPA); Member of American Institute of Certified Public Accountants (AICPA) & National Association of Tax Preparers.
  • Years in the field: More than 35 years of experience in the Certified Public Accounting field.
  • Experience: Work with various accounting and tax issues, client base includes individuals, small closely held businesses and nonprofit organizations; perform income tax planning and tax return preparation for both individuals and businesses; perform accounting and auditing services as needed. My priority is to be a trusted resource for all clients and our firm staff.
Dave Mangskau, Retired
Credential & Education: Bachelor of Science in Accounting at Winona State UniversityMember: Minnesota Society of Certified Public Accountants (MNCPA); Member of American Institute of Certified Public Accountants (AICPA)Years in the field: 35 years of experience in the accounting field. Retired as of 12/31/2023Experience: 35 years of working with small businesses, individuals and agricultural clients, serving their tax accounting & consulting needs.
Kelly Montanye, CPA
  • Credential & Education: Bachelor of Science in Accounting from Winona State University Licensed as -Certified Public Accountant.
  • Member: Minnesota Society of Certified Public Accountants (MNCPA); Member of American Institute of Certified Public Accountants (AICPA)
  • Years in the field: Have been with Honstad, Dieser & Mangskau, P.L.L.P. since Dec 2007
  • Experience: I have experience in a wide range of services, including Corporate, Partnership, Individual Income tax, Trust, Estate and Non-profit accounting and taxation. I strive to be a trusted and reliable resource for clients.
Braden Heavner, Accountant
  • Credential & Education: Bachelor of Science in Accounting from Minnesota State University- Mankato
  • Years in the field: Have been with Honstad, Dieser & Mangskau, P.L.L.P. since June 2023
  • Experience: I have experience auditing financial statements and filing out corporate, partnership, and individual income tax returns. I strive to continue learning and become the best accountant I can be to help clients.
Jean Hellickson, Firm Bookkeeper
  • Years in the field: More than 35 years of experience in payroll and bookkeeping. I have been working as Bookkeeper with Honstad, Dieser & Mangskau, P.L.L.P. since November of 2016.
  • Experience: I have experience with payroll, bookkeeping and working close with all the firms needs.
Mardy Oyer, Bookkeeper
  • Credential & Education: Three years higher education with Winona State University. Continuous certified training for 36 years.
  • Years in the field: More than 40 years of experience in payroll and bookkeeping. I have been with Honstad, Dieser & Mangskau, P.L.L.P. since 1987.
  • Experience: I have worked with a variety of business and payroll clients over the years and have enjoyed the changes and challenges it has brought me. My goal is to provide a superior product and experience for our clients by giving attention to the smallest details.
Tammi Trittle, Bookkeeper
  • Credential & Education: Associate Degree in Accounting from South Central Technical College
  • Years in the field: More than 25 years of experience in payroll and bookkeeping.  I have been with Honstad, Dieser & Mangskau, P.L.L.P. since 2021.
  • Experience: I have experience with payroll and bookkeeping for individuals and businesses.  I love being a resource for our clients.  I strive to keep them abreast of new payroll changes that affect their business and be a continued resource for them.
Veronica Weitzel, Office Administrator
  • Years in the fields: I have been working as an Office Administrator with Honstad, Dieser & Mangskau, P.L.L.P. since October of 2016.
  • Experience: As an Office Administrator I am a supportive force in each area of the office. As a analytical person, good communication skills and a detail-oriented mindset, I love being in the administrative role and communicating with people through emails, phone calls or the day by day interactions. I enjoy what I am doing every day with a smile on.

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