Wilco is the principal product owner of axe-core and axe DevTools at Deque Systems. He is based in the Netherlands and has worked in accessibility for over 18 years. During this time, Wilco has worked in auditing, consulting, standards authoring, and accessibility tool development. Notable work includes being project manager of WCAG 3, founding chair of ACT Rules Community, lead developer of axe Linter and WCAG-EM report tool, and industry advisor to the EU's Web Accessibility Directive Expert Group.