Campbell joined Broadway Malyan in 2018 as the first Independent Chair of the Broadway Malyan Employee Ownership Trust (EOT). He chairs a Board of six other EOT Trustees who are drawn from across the business. The EOT was set up in 2016 to hold a majority shareholding in the business on behalf of all employees.

He is Chief Executive of independent charitable think tank Ownership at Work, delivering a multi-strand research programme into the economic and social impact of sharing ownership and participation with workers and employees.

Campbell has supported and/or helped to run employee and worker-owned organisations since 2008. He was the founder-MD of an employee owned consultancy firm which he ran for eight years and has sat on the Operating and/or Trustee Boards of multiple EO organisations. Campbell is a relentless advocate for deeper understanding of shared ownership through public speaking, business support, specialist training and roles with Government, universities and business standards setters.