Rated 5 out of 5
5 out of 5 stars (based on 98 reviews)
Very good0%

Worth Every Penny!

Rated 5 out of 5
October 7, 2021

Sam, and his crew made what was a pretty complex and lengthy process go nice and smooth for me! Sam walked me through every step of the process and told me what to expect along the way. Returned every phone call and text almost immediately, once even from behind the wheel of a ship!
Looking forward to working with you in the near future.
You guy’s have a great service here, keep up the great work!


With Sam first time was the charm

Rated 5 out of 5
October 6, 2021

Having been in business for many years before pursuing my OUPV credential I always appreciated working with (and paying for) outside expertise that made the end result better and easier for me. That was my experience with Sam at DMS. Clean, clear communication and a bullseye on the goal. Thanks Sam and we’ll see you again at Master upgrade time!

Craig G Royston


Rated 5 out of 5
September 21, 2021

Went to get my T.O.A.R. Great class! Really exceeded my expectations. A real “Hands on” class where you actually learn something.
Sam is always willing to help with any questions long after you’ve completed the class without “nickel and diming” you.
Cannot recommend Diamond marine services enough!

Michael Parenteau

Excellent work on my complicated application

Rated 5 out of 5
September 21, 2021

Sam and the crew crushed it on securing my 200 Ton masters.
I personally had a complicated application with deadline needs and various moving parts. They reviewed all the paperwork and caught all the mistakes before sending it out and getting it done in a very timely manner.
Customer service and communication was top notch.
I have been and will be recommending them to all professional mariners.

Gabriel Russell

What a Relief!

Rated 5 out of 5
September 18, 2021

Sam’s assistance in navigating the USCG and Homeland Security system of twists and turns was so worth the price. Anyone looking to obtain their MMC need look no further. This is your one stop shop for assistance. THANK YOU!

Doug C.


Rated 5 out of 5
August 26, 2021

I cannot thank DMS enough. They tutored me along the way, and flawlessly handled all transactions with the MMC/USCG. Couldn’t have done it without them.

Captain Drew

TOAR Assessments

Rated 5 out of 5
August 9, 2021

Had a blast doing the assessments in Boston. The tug used is a very cool old tug. I had never ran a single screw boat of any real size and I had no problems what so ever the boat handles like a dream making the assessments go very smoothly. The coolest part is the class is centered around the boat handling aspects of the TOAR. Everyone got to have their turn docking and undocking, towing on the hip through a bridge, making up a tow, landing the barge along side another barge it was a really fun and informative experience. Capt. Birk was really great to work with.

Cole Ward

Great Experience!

Rated 5 out of 5
August 7, 2021

Sam was a pleasure to work with,. He was very knowledgeable and friendly. I am glad I found Diamond Marine Services to help me take my captain’s license online exams but also process the entire US Coast Guard application. which went smoothly.. Thanks to their help, I just received my 100 GRT license in the mail today. Would recommend their services to anyone serious about getting their license quickly!

Newly Licensed Captain Marc


Rated 5 out of 5
July 30, 2021

DMS took all the guess work out of it. Getting it right the first time was so worth it and made for a smooth process.


Great service and communication.

Rated 5 out of 5
July 12, 2021

The application process can be confusing but Sam makes it very easy. Diamond marine is there for help and to answer questions every step of the way. Thanks so much Sam and Diamond.

Captain Craig Frerichs

Filed my paperwork

Rated 5 out of 5
July 11, 2021

Great people filed my paperwork fast and got my oupv quick from the coast guard I’d highly recommend them thanks guys

Captain Steve

No Title

Rated 5 out of 5
June 23, 2021

Excellent service. Highly recommend.

Master’s License Renewal

Rated 5 out of 5
June 14, 2021

After 50 years in the marine industry, this was the smoothest application process I’ve been through. I’m already passing the word to others in my industry. It was three weeks from application to approval. I highly recommend this service.

Captain Brian Styke

A Big Thanks in appreciation of the service and assistance.

Rated 5 out of 5
June 3, 2021

A special Thanks to Sam,
Give my Aloha and thank you Sam I your assistance of my MMC Credential License and another Special Thanks to Neil Smith of refer to Daimondmarineservices , lm very appropriative and expertise in the service. I would highly recommend and 5-star rate.

Captain Jerry K Kaehu

The easiest and the best

Rated 5 out of 5
June 3, 2021

Used Diamond Marine Services to get my OUPV and they were there all the. way. Sam made the whole process almost to easy. They are the best and highly recomend them.

Allen Bedsole

Thank you Sam

Rated 5 out of 5
May 26, 2021

Wonderful experience! Sam gets the job done!

Tyler Putney

Thanks for the help!

Rated 5 out of 5
May 26, 2021

Sam knows the USCG credential system inside and out! He is a great resource for easing the pain of license renewals.
Highly recommend!

Michael Buelsing

Captain's License Renewal Exam and Assistance on Completing the Administrative Process

Rated 5 out of 5
May 3, 2021

Sam was exceedingly helpful with the mechanics of the Final Exam (and very patient, I would add, as I struggled with the connectivity of my devices to the web-site).
Sam also assisted in helping me complete the USCG request for additional information as we completed the Renewal process…successfully I must add.
I strongly recommend using DMS to help any mariner through this government process. It became painless and actually easy to complete.

Ed Sterbenc

Master of Towing Endorsement

Rated 5 out of 5
April 14, 2021

I recently took the TOAR course for my Master of Towing Endorsement. I had issues with the NMC and Diamond Marine stepped in and handled everything. I told them the problem I was having and they took over. It was so stress free, and easy. They definitely went above and beyond!

Peter Kaple


Rated 5 out of 5
April 12, 2021

100 Stars service Thank You


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