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

1,036 Profile Views

Tyrone Bednar

Feb 02, 2026

Would recommend Diane M. Johnsen for sure to anyone in Phoenix needing legal help

I wasn't sure who to call for my Appellate Practice law problem, but I'm so glad I went with Diane M. Johnsen. They really listened to me and understood my situation. It was such a relief to have some...

Karen Nienow

Feb 02, 2026

Really helpful and compassionate service from everyone at Diane M. Johnsen's firm

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...

Valerie Connelly

Feb 02, 2026

Diane M. Johnsen did a great job handling my complex Appellate Practice law case from start to finish

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...

Aubrey Crist-Ferry

Feb 02, 2026

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

Marcus Heaney

Feb 02, 2026

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

It's hard finding a reliable lawyer these days, but Diane M. Johnsen in Phoenix is definitely one of the good ones. Would use them again if needed without hesitation. They are professional, responsive...