Blankenau began his post–school volleyball career training at the Team Canada Full Time Training Center in
Gatineau. He spent the 2012/13 and 2014/15 season there, spending a season at
Greek club MAS Niki Aiginio in between. In 2015, he signed a contract with
Dutch club
Abiant Lycurgus, helping them win the championship. For the 2016/17 season, he joined
SWD Powervolleys Düren in
Germany.
National team Blankenau joined the senior national team in 2014. He was a member of the
Canadian national team that finished 5th at the
2016 Summer Olympics. In June 2021, Blankenau was named to the
Canada's 2020 Olympic team. ==Honours==