They will work with OTP winter sport director Peter Judge, who formally assumed the role after the Sochi Games. The longtime CEO of the Canadian Freestyle Ski Association was originally named to the position last June.
Their job will be to help Canadian athletes to Olympic and Paralympic success at the 2018 Winter Games and beyond.
"This is a passionate and determined group of high achievers who have played a variety of key roles in Canada's high-performance sport system," OTP chief executive officer Anne Merklinger said in a release. "With Peter at the helm, I am confident this accomplished group of technical leaders will foster the critical relationships required for Canada's winter sport organizations, coaches and athletes, to win more medals."
Allison spent the last four years with the United States Olympic Committee. He's a former high-performance director, team leader, coach and athlete with the CFSA.
Ellis, meanwhile, has served as athletic director for Canada's skicross team over the last six years and has worked in a variety of roles with Alpine Canada since 1999.
They will work to identify the resources that athletes and coaches require to achieve excellence while working with the technical staff of the various national sport organizations. In addition to monitoring the progress of the sports, they will provide support and counsel to high-performance directors and coaches, and provide solutions to gaps in high-performance plans and programs.
A third high-performance adviser will be named later this spring.