Since 2005, Gustaf has been immersed in the marine business, beginning with four years as a service engineer specializing in RORO, hatch covers, and cranes. This was followed by four years as a hydraulic designer focusing on new builds and conversions of RORO and linkspans. After managing hydraulic design, electric design, and programming for several years, Gustaf transitioned to Manta Marine in 2021. There, he managed process design, electric design, and programming before returning to the service area where his marine career first began.