A “lawyer’s lawyer,” Aaron focuses his practice on representing and advising other lawyers on matters of ethics and professional responsibility. Aaron previously worked for the firm for three years before transitioning to the public sector where he worked as an attorney at the Minnesota Office of Lawyers Professional Responsibility. There, he investigated and prosecuted matters involving attorney misconduct. Aaron rejoined Christensen Law Office PLLC in July 2019. He also supports the firm’s trademark litigation and business litigation clients.

Aaron is an Adjunct Professor of Law at Mitchell Hamline School of Law, which is also his alma mater. In law school, he was a CALI award recipient, earned Dean’s List honors, and served on the editorial board of the Mitchell Hamline Law Review Volume 42. Before law school, Aaron worked for more than four years in retail banking and consumer deposit compliance.

In his free time, Aaron enjoys golfing, four-wheeling, downhill skiing, and spending time with his family and friends. He is also an avid fan of the Minnesota Twins, Vikings, Wild, and Timberwolves.



Membership & Affiliations

Awards & Recognition

Super Lawyers Rising Star




Aaron D. Sampsel, “Professional Quandaries and Quagmires – Attorney Liens: What You Can and Cannot Claim” (Minn. Lawyer Sept. 30, 2019).