Ruud Schilders has worked at these customers:
- Rijkswaterstaat, Rotterdam (2019 – present)
- APM Terminals, Maasvlakte (2018 – present)
- Amgen, Breda (2012 – 2019)
- Equens / equensWorldline, Utrecht (2016 – 2018)
- Forever Direct, Roosendaal (2015 – 2018)
- Equens, Utrecht (2010 – 2012)
- SPS, Reeuwijk (2008-2009)
- IBM, Amsterdam (2005-2008)
- T-Mobile, Den Haag (2004 – 2005)
- LogicaCMG, Hoofddorp (2002 – 2004)
- Shell Gabon, Gamba, Gabon (2001 – 2002)
- Unilever, Rotterdam (1999 – 2001)
- GE Plastics, Bergen op Zoom (1998 – 1999)