Greg was first elected as the MLA for Yorkton in the 2007 provincial election. He was re-elected in 2011 and 2016. Born in Regina, Greg is a long-time resident of Yorkton and a man who has always been involved in his community. Prior to being elected, Greg owned and operated Ottenbreit Waste Systems, a private environmental and waste disposal business. He is an avid motorsports enthusiast and commercial pilot.
Greg has been married to his high school sweetheart, Leone, for over 33 years. They have two daughters, Katelin, son-in-law Mark and two grandchildren, Raya and Malaya, and Rayanne, son-in-law Austin, granddaughter Wynnslet, and grandsons Otto and Crew.
In 1998, Greg and Leone started "Brayden Ottenbreit Close Cuts for Cancer" – an event that encourages volunteers to shave their heads to raise money for cancer research and local initiatives. The charity is named in honour of their son, Brayden, who lost his battle with cancer in 2000 at age 5. Nearly $1 million has been raised for cancer research and local cancer initiatives. In recognition of these efforts, they received the Community Merit Award in 2016, presented by the Yorkton Chamber of Commerce.
Because of their community involvement and volunteerism, Greg and Leone were recognized in 2005 with the Saskatchewan Centennial Medal. Greg was recognized again in 2012 with the Hal Rogers Fellow Award, the highest honour presented by the Kinsmen of Canada.
On August 13, 2019, Greg was appointed Minister of Highways and Infrastructure, and Minister Responsible for the Water Security Agency. He previously served as Minister Responsible for Rural and Remote Health for five years.
Greg has also served as the Legislative Secretary to the Minister of Social Services (Community-Based Organizations initiative), Legislative Secretary to the Minister of Environment (Recycling), and Legislative Secretary to the Premier (Vulnerable Youth). He has served as Deputy Government Whip, Government Whip, and as a member of the Standing Committee on Human Services.