WILLMAR, Minn. (October 26.2026) — The Partners of Christianson PLLP are pleased to announce the appointment of Sara DeRoo, CPA, as Chief Executive Officer, effective January 1, 2027.
Joel Gratz, CPA, who has served as CEO since 2021, will transition from the firm’s top leadership role to further his focus on serving clients and supporting industry growth initiatives as a leader within the agribusiness industry.
“As Christianson continues to grow, the CEO leadership role will require a full-time focus on strategy and operations, while our industry leaders devote increased attention to client service and business development. I am grateful for the opportunity to focus on my work advising and supporting farmers, producers, and agribusiness leaders. I have complete confidence in Sara’s ability to lead Christianson into the future,” said Gratz.
DeRoo added, “I am honored by the trust placed in me by the Partner Board and excited to serve as Christianson’s next CEO. Our firm has a strong foundation, outstanding employees, and tremendous opportunities ahead. I look forward to working alongside our partners and team members as we continue to grow.”
About Sara DeRoo
DeRoo brings over two decades of experience in public accounting, firm leadership, and talent development to her new role as Chief Executive Officer. Since joining Christianson in 2008 and becoming partner in 2015, she has become a trusted advisor, respected industry leader, and key driver in the firm’s growth and innovation. As part of this leadership transition, DeRoo will step away from her role as the firm’s inaugural Chief Talent Officer.
As Christianson’s Chief Talent Officer, she oversaw and strengthened talent strategy, recruiting, leadership development, and workforce planning. She also led the firm’s audit and attestation practice and oversees the Quality Control Committee, helping ensure the highest standards of service and professional excellence across the organization.
DeRoo currently serves as Board Chair of the Minnesota Society of Certified Public Accountants (MNCPA). A passionate advocate for developing the next generation of accounting professionals, she has championed internship programs, student outreach efforts, job shadow opportunities, and workforce development initiatives throughout Greater Minnesota.
In recognition of her leadership and contributions to the profession, DeRoo was named one of Forbes’ Best-In-State CPAs in both 2025 and 2026.
As CEO, DeRoo will focus on advancing Christianson’s strategic vision, strengthening operational excellence, investing in people and technology, and supporting the firm’s continued growth initiatives. Her deep commitment to clients, employees, and communities positions her well to lead Christianson into its next chapter while remaining true to the values that have defined the firm for generations.
About Christianson
Christianson PLLP is a full-service accounting, tax, consulting, and advisory firm serving clients across a variety of industries, including agribusiness, renewable energy, community businesses, and mutual insurance. With offices throughout Minnesota and a team dedicated to delivering forward-thinking solutions, Christianson helps clients navigate challenges, seize opportunities, and achieve long-term success. Christianson is also a member of CLA Global, a worldwide organization of independent accounting and advisory firms.
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