Birgitte Ringstad Vartdal is one of many Norwegian executives to have made the leap from shipping to renewables.

However, fewer have made the leap both ways.

"I came into shipping from renewable energy, and many other [shipping] colleagues had a background in energy," she told TradeWinds.

In 2010, aged 33, Ringstad Vartdal was headhunted from Torvald Klaveness to replace Geir Karlsen as chief financial officer at John Fredriksen's Golden Ocean.