NSS Spółka z o.o. is a Polish company functioning in the shipbuilding industry. It is owned by Olsen Gruppen AS. Since 2007 NSS has been working for Norwegian shipyards, incl. Bergen Group BMV, Nymo AS and Havyard Leirvik AS. Since 2009 the company has focused more on the Polish market. It repairs, reconstructs and extends ships. The company also manufactures cranes and offshore structures. In 2011 NSS entered the shipbuilding market.