Siân Matthews is a corporate director. Until 2009, she was a partner and head of the Private Services Group at Bennett Jones LLP and she began her legal career at Macleod Dixon LLP in Calgary.

Siân is also a director of Cidel Bank Canada, The Calgary Foundation and the Southern Alberta Opera Association, and a past director and Chair of the Governance Committee of the Calgary Municipal Lands Corporation, a past director and Chair of the Governance Committee of the Heritage Park Society and a past director of the Calgary Opera Association. She is also a director of several private corporations.

Siân is the past Chair of Canada Post Corporation, where she had also served as Chair of the Strategic Initiatives Oversight Committee, Chair of the Corporate Social Responsibility and Environmental Risks Committee and a member of the Audit Committee, Governance Committee, Human Resources Committee and Pension Committee.

Siân has nationally recognized legal expertise in the areas of taxation and governance and has been distinguished by her peers by inclusion on the Best Lawyers in Canada and the Lexpert Leading Practitioners lists.

Siân is a member of the Law Society of Alberta and has a Bachelor of Arts degree from the University of Waterloo, a Juris Doctor degree from the University of Ottawa and an ICD.D designation.