Yes, Jan worked extensively across a wide range of industries throughout his life, consciously opting for interim contracts in later years to maintain flexibility while building his creative career.

His complete professional trajectory includes:

• Military Service (1988–1989): Served in Spich, Germany, as a sharpshooter and Stormtrooper (of Death).
• Manufacturing & Wholesale (1989–1998): Started as a production worker for medical sealing systems at Helvoet Pharma NV (1989–1991), operated his own self-employed gadget wholesale business (1991–1995), and worked as head warehouse manager at Super Soldi NV in Gent (1995–1998).
• Sales, PR, & Quality Control (1998–2002): Handled telesales and festival representation for the Vlaamse Uitgeversmaatschappij (1998), served as regional manager and PR officer for 0-Internet NV Gent (1998–1999), worked as a final quality inspector for Volvo Cars Gent (2000), and managed warehouse systems for Garage Croonen Opel (2001–2002).
• Interim Industrial Team Lead (2002–2004): Worked as a temporary team leader, machine operator, and quality control officer across companies including TKA Houthalen, Electro-Nite, and Recmix Genk.
• Concert Promotion & Event Management: Built a reputation as a concert organizer in the metal scene, managing productions such as the Gentse Bieste (during the Gentse Feesten) and the Operation: Citadel festival in 1998, as well as pioneering the Ferrum metal community.
• Music Production (2004–Present): Dedicated over two decades to composing and producing independent electronic and metal music, releasing around 800 tracks under aliases such as Gloomer, Gloomer2000, and Jan Gloomy