Lennie was appointed deputy minister for Western Economic Diversification Canada (WD) on November 1, 1997. Prior to joining WD, Lennie worked for the Alberta government for 26 years and was deputy minister of Federal and Intergovernmental Affairs from 1990 to 1997. She has had extensive involvement in constitutional and aboriginal constitutional negotiations and intergovernmental negotiations on social, economic, international trade, and internal trade policy.
A graduate of the University of Alberta, she has received numerous awards for her accomplishments in public service and in the area of business and management, including the Lieutenant Governor's Gold Medal for Excellence in Public Service in 2002 and the YWCA Women of Distinction Award in 1997.
Lennie is currently on the board of directors of the Canada West Foundation, which explores public policy issues of interest to western Canadians.
- Stuart Thomson, "Longtime public servant among those named to Order of Canada; Lennie played role in Meech Lake, Charlottetown accord discussions". Edmonton Journal, December 31, 2016.
- "Senior Alberta employee takes federal position". Edmonton Journal, March 20, 1997.
- "YWCA honours fourteen women; Winners of Women of Distinction Awards". Edmonton Journal, May 16, 1997.
- "Order of Canada's newest appointees include Paralympian, Supreme Court judge and astrophysicist". CBC News, December 30, 2016.
- Oryssia J. Lennie, Deputy Minister, Western Economic Diversification Canada
- Oryssia Lennie - Board of Directors - Canada West Foundation