Mr Calkin is the Managing Director of F. B. Hall & Co. Limited, a company with over 50 employees and 100 years of operations providing plumbing, gas and drainage services in the Waikato region. Mr Calkin is a Certifying Plumber, Drainlayer and Gasfitter with 35 years of experience in the industry. Mr Calkin has undertaken a number of governance roles in cycling including local club president, regional coordinator positions, a board member of BMX New Zealand Incorporated and various committees and projects with Cycling NZ. Mr Calkin is also a member of the Waikato Chamber of Commerce. Mr Calkin is a former member of the NZPM Future Governance Programme and is a member of the Institute of Directors in New Zealand (Inc.). Mr Calkin is Chair of the Health and Safety Committee and is a member of the Audit and Risk Committee.