Mark C. Dietzen

Laura Hammargren is a top attorney recognized by Best Lawyers in the practice area(s) of Mass Tort Litigation / Class Actions - Defendants. Laura, who practices law in Minneapolis, Minnesota, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Laura is held by other top lawyers in the same geographic and legal practice area.

Joseph Anthony founded Anthony Ostlund as a boutique specializing in business litigation with an emphasis on financial fraud, securities, employment, anti-trust and commercial real estate litigation. Consistent with his founding vision, Joe works hard to attract and retain top-flight business trial lawyers to provide consistently high-quality representation for the firm's clients. Joe has tried a significant number of cases and arbitrations to verdict in Minnesota and throughout the country. ...

Cory Whalen is a partner and shareholder at the law firm of SiebenCarey. He practices in all areas of personal injury litigation. He was selected as one of America's best lawyers in the area of product liability litigation by the Best Lawyers of America. Selection to Best Lawyers of America is based on an exhaustive and rigorous peer-review survey comprised of more than four million confidential evaluations by the top attorneys in the country. Cory is certified as a life member of both the Mi...

Mark provides legal services to professionals, including attorneys, accountants, architects, engineers, and title agents. He also represents product manufacturers and various companies in the construction and finance industries. His work involves primarily contested matters, including civil litigation, arbitration, mediation, and representation of individuals and companies before government licensing agencies. He is also one of the firm’s leaders, serving as a member of its Management C...

Tony has spent a large part of his career handling large loss and catastrophe litigation including fires and explosions, product liability, property and casualty litigation. He has handled a range of complex insurance coverage disputes. Tony is often called upon to go to fire scenes and take control of fire investigation to protect his clients’ interests. He has substantial trial experience, having tried cases in state courts throughout the Midwest and in federal court. He also has subs...

When faced with a challenge that seems impossible, I am determined to find a solution. I keep going. That is my personal commitment to you, and persistence pays off. I advise a diverse range of businesses of all sizes, and individuals at all levels—at every stage—regarding: business formation mergers and acquisitions reorganizations distribution, supply and other commercial transactions employment relationships general contract matters. Whether you are struggling with contract iss...

Jana Aune Deach is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Jana Aune, who practices law in Minneapolis, Minnesota, has been recognized since 2014. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jana Aune is held by other top lawyers in the same geographic and legal practice area.

Rob focuses his practice on insurance coverage and complex environmental litigation— especially cases involving environmental claims made under a wide variety of insurance policies. When the environmental claims involve a catastrophic event, he represents insurers and insured in both defending against such claims and their efforts to recover funds from legally responsible third parties. He’s currently leveraging that experience by providing his advice and counsel to insurers faced...

Joel T. Wiegert is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law. Joel T., who practices law in Minneapolis, Minnesota, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Joel T. is held by other top lawyers in the same geographic and legal practice area.

Philip P. Caspers is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Intellectual Property and Litigation - Patent. Philip P., who practices law in Minneapolis, Minnesota, has been recognized since 2001. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Philip P. is held by other top lawyers in the same geographic and legal practice area.