John O. Shirley

John O. Shirley

Energy Law Government Relations Practice
Recognized in Best Attorney USA since 2011

About John

John Shirley practices in the area of business law, having represented public utilities before the Louisiana Public Service Commission for over twenty years. His practice consists of representing electric, gas, water and sewer utilities, motor carriers, telecommunications companies, and wind and other renewable energy companies before the Louisiana Public Service Commission. He also consults and lobbies elected public service commissioners, the Louisiana Bond Commission, executive staff and the Louisiana legislature on behalf of his clients.Prior to joining the firm, he was the founding partner of Shirley, Ezell, Guarisco & Marionneaux, LLC.

John Shirley practices in the area of business law, having represented public utilities before the Louisiana Public Service Commission for over twenty years. His practice consists of representing electric, gas, water and sewer utilities, motor carriers, telecommunications companies, and wind and other renewable energy companies before the Louisiana Public Service Commission. He also consults and lobbies elected public service commissioners, the Louisiana Bond Commission, executive staff and the Louisiana legislature on behalf of his clients.Prior to joining the firm, he was the founding partner of Shirley, Ezell, Guarisco & Marionneaux, LLC.

Prior to joining the firm, he was the founding partner of Shirley, Ezell, Guarisco & Marionneaux, LLC.

Professional Affiliations

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Reviews

4.5 / 5

38 Reviews

1,054 Profile Views

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Katrina Pfeffer

Jan 29, 2026

I was completely overwhelmed until I found John O. Shirley for my Energy Law case

Last year, I found myself in a really difficult spot with a Energy Law problem in Baton Rouge. I had no idea where to start and was honestly terrified of the process. John O. Shirley was recommended t...

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Laura Herzog

Jan 29, 2026

A very good experience overall with the entire team at John O. Shirley's legal practice

It's hard finding a reliable lawyer these days, but John O. Shirley in Baton Rouge is definitely one of the good ones. Would use them again if needed without hesitation. They are professional, respons...

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Alma Ruecker

Jan 29, 2026

Highly recommend John O. Shirley for anyone needing expert Energy Law help in Louisiana

Honestly, I can't thank John O. Shirley enough for everything they've done for me. They really know their stuff when it comes to Energy Law and it shows in the results. 10/10 would recommend to anyone...

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Neil Carroll-Quitzon

Jan 29, 2026

I was completely overwhelmed until I found John O. Shirley for my Energy Law case

I don't usually write reviews, but the help I got from John O. Shirley during my Energy Law case in Louisiana deserves to be shared. It was a messy situation, and I was getting nowhere on my own. Thei...

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Jane Hessel

Jan 29, 2026

So glad I called John O. Shirley to handle my Energy Law case in Baton Rouge

I wasn't sure who to call for my Energy Law problem, but I'm so glad I went with John O. Shirley. They really listened to me and understood my situation. It was such a relief to have someone so knowle...