Guillermo “Memo” Castro is the founder and president of 40 Grados Sur, a shipyard that has been the building facility of Antares Catamarans since 2010. In the past, Memo has managed his own established boatyard and managed the production of the Open 30 sailboat with an innovative moving keel, the Milonga 35 – a tender designed by German Frers, and a 42-foot classic Marco Polo trawler.

By the age of 50, Memo has spent a lifetime as a professional sailor, both as crew member and skipper. Memo’s career includes intensive training with North Sails Argentina, where he later set up a new Rigging and Deck Handling Management division. In this role he advised on and set up ideal rigging and deck hardware, working with leading brands such as Lewmar, Sparcraft and others.

Memo gained building experience by managing the refurbishment and construction projects of a number of cruising and racing yachts and has worked with all available materials including carbon fiber, FRP, wood and steel.