George Tsavliris is strongly associated with one of shipping’s largest salvage firms, Tsavliris Salvage. But it is less well known that he spent his early career as an underwriter in London.

Fifty years after underwriting his first ship, Tsavliris has returned to the marine insurance business as non-executive chairman of Oneglobal Greece & Cyprus.

Oneglobal Greece & Cyprus, which says it is the first dedicated marine broker in the two countries with a Lloyd’s of London licence, has built a client base representing 850 ships, including 350 that it...