Diane M. Johnsen

4.4 (40 reviews )

Phoenix Arizona United States

Appellate Practice Commercial Litigation Environmental Law

Recognized in Best Attorney USA since 2005

602-351-8000 Website

About Diane

Diane M. Johnsen is a top attorney recognized by Best Lawyers in the practice area(s) of Appellate Practice, Commercial Litigation and Environmental Law.Diane M., who practices law in Phoenix, Arizona, has been recognized since 2005. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Diane M. is held by other top lawyers in the same geographic and legal practice area.

Diane M. Johnsen is a top attorney recognized by Best Lawyers in the practice area(s) of Appellate Practice, Commercial Litigation and Environmental Law.

Diane M., who practices law in Phoenix, Arizona, has been recognized since 2005. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Diane M. is held by other top lawyers in the same geographic and legal practice area.

Practice Areas

Appellate Practice

Commercial Litigation

Environmental Law

Education

Duke University

Awards & Recognition

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Reviews

4.4 / 5

40 Reviews

1,043 Profile Views

Juanita DuBuque

Feb 02, 2026

Solid work and professional service from Diane M. Johnsen in Phoenix for Arizona residents

I've worked with a few lawyers in Phoenix over the years, but Diane M. Johnsen stands out for their honesty and thoroughness. They were clear about the process and kept me updated at all times. I felt...

Kari Pagac

Feb 02, 2026

A very good experience overall with the entire team at Diane M. Johnsen's legal practice

I appreciate how Diane M. Johnsen handled my case. No fluff, just straight to the point and very effective representation for my Appellate Practice law matter. They are obviously very experienced and...

Kevin Kohler

Feb 02, 2026

Many thanks to Diane M. Johnsen for the hard work and dedication to my legal matter

Super helpful and professional staff at Diane M. Johnsen's office. Thanks again for everything you did for me! It was a long journey, but you made it much easier with your constant support and legal e...

Patricia Lockman

Feb 02, 2026

Professional service and clear communication provided by Diane M. Johnsen in Phoenix

Needed help with Appellate Practice law and Diane M. Johnsen delivered on their promises. They're professional, efficient, and easy to talk to. Good choice for anyone in Arizona looking for high-quali...

Jackie Adams

Feb 02, 2026

So glad I called Diane M. Johnsen to handle my Appellate Practice law case in Phoenix

Diane M. Johnsen has been doing this since Recognized in Best Lawyers since 2005, and it definitely shows in their work. They're pros through and through and I wouldn't trust anyone else with my legal...