About Us

Established in the Boat Building & Maintenance Industry for over 22 years, we service vessels of all types in and around the Sydney basin. We pride ourselves on our quality workmanship, extensive experience and great customer service, all of which underpin every job we undertake. Our large workshop and yard offers the capability to store and work on a variety of vessels and we also provide a fully mobile service Sydney-wide.


We provide Commissioning services to all boats and have 20 years experience in commissioning quality yachts from Jeanneau, Arvor and …

Servicing & Maintenance

Let us take care of your annual servicing and maintenance including cleaning, polishing and antifoul, anodes and varnishing maintenance

Installations & Customised Products

We are experienced in all installations including interior re-fits, plumbing, holding tanks, bow thrusters and custom moulded products

Now Hiring! Cosine Marine Pty Ltd is looking for qualified Trades (Painter / Panel Beaters)

A few of our trusted clients


“Thanks for fitting me in with such short notice. It was a job well done and the result is far better than how it looked before.”

Paul – Timber veneer repair

“Carl and the team from Cosine were great to deal with.”

Jeff – Jeanneau SO 349