John Dissen
John Dissen at Hennessy Porsche North Atlanta

John Dissen

Porsche Certified Brand Ambassador

Hennessy Porsche North Atlanta

990 Mansell Rd
Roswell, GA 30076

5.0
111 Reviews

I am an Atlanta native who has worked in the high line automotive industry since 1998 and pride myself on being my client’s trusted resource. Having personally bought over 40 cars, boats, and motorcycles, I consider myself not only an enthusiast but also someone who is familiar with the excitement as well as the apprehension associated with the buying process. My goal is to provide my clients exceptional service in the form of attention to detail, integrity and product knowledge.

5.0

111 Reviews

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111 Reviews of John Dissen

October 23, 2025

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We just purchased our third Porsche from Hennessy Porsche. John Dissen made the whole process a pleasure. They take customer service seriously. More

by smosley
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Yes

October 21, 2025

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I have been working with John Dissen and the team at Hennessey Porsche for 10 years. They have the utmost integrity and always go the extra mile to make sure their customers are delighted. More

by Tom S
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Yes

September 05, 2025

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I had a wonderful experience buying my new at Hennessy Porsche at the North Atlanta location thanks to John Dissen. John was incredibly patient and knowledgeable, answering all my questions without makin More

by camillerogers11
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Recommend Dealer
Yes

Other Employees Tagged: Michael Carvajal

August 17, 2025

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This was my first experience with buying a Porsche, and John made the entire process so easy and smooth every step of the way. From the initial test drive, to the build process, to the final delivery and w More

by Steven M
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Yes

May 02, 2025

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I had a great experience purchasing my vehicle from Hennessy Porsche. John Dissen was a consummate sales professional throughout my experience…easy to work with, communicated well, and guided me throu More

by Irish Potatohead
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Recommend Dealer
Yes

Other Employees Tagged: John Sargent

March 24, 2025

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Our experience at Hennessy Porsche was great. John Dissen was nothing short of amazing. Excellent communication through out the process. Delivery experience was as expected for Porsche. They More

by joeconsolo
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Recommend Dealer
Yes

Other Employees Tagged: Drew Borges

February 03, 2025

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John Dissen and Hennessy Porsche make buying a Porsche simple and easy. John is very honest and up front with answers to any questions I have had. I feel very comfortable trading with John. More

by edailey72
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Yes

December 30, 2024

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I bought my first vehicle from Hennessy years ago and I have had the same great experience every time. I recently purchased my fourth car not just because of the quality but because of the service and expe More

by Epkang
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Yes

Other Employees Tagged: John Sargent

November 21, 2024

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SalesmanJohn Dissen did a superb job of finding thr car we were looking for even though this took several months. He was always available to answer our questions and made the purchase a breeze. None better More

by Ron
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Yes

Other Employees Tagged: Joel Hughes, Emerson Knauss

October 31, 2024

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I had a very pleasant and productive visit to Hennessy Porsche as my sales representative, John Dissan, was exceptional and very professional, in coordinating my Cayenne purchase. I look forward in workin More

by Henry Bassett
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Recommend Dealer
Yes

Other Employees Tagged: John Sargent

Dec 18, 2024

Hennessy Porsche North Atlanta responded

Henry, we're thrilled to hear that John provided such an exceptional and professional experience while coordinating your Cayenne purchase. We truly appreciate your trust in Hennessy Porsche and look forward to continuing to serve you throughout your ownership. Enjoy your beautiful new vehicle!

Dec 18, 2024

Henry Bassett responded

John Dissan continues to support me beyond the sale of the Cayenne, as he has been very helpful in addressing my questions pertaining to the utilization of the vehicle during my early stages of ownership.

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