Sir Leo Arthur Hielscher, AC (born 1 October 1926) is an Australian senior public servant and administrator.

[1] Leo Hielscher was educated at Brisbane State High School and University of Queensland (BComm, AAUQ).

Sir Leo is also the inaugural Chairman of Austsafe Ltd (an industry Superannuation fund); Chairman of the Independent Superannuation Preservation Fund, and the Queensland Health Reform Advisory Panel, a Commissioner of the Local Government Reform Commission and a Director of the American Australian Association Ltd. As a Company Director, Sir Leo has considerable experience at Board level and has been associated with a number of public and private sector Boards.

Sir Leo was awarded an Eisenhower Fellowship in 1973, a Knight Bachelor in 1987, an Honorary Doctorate of Griffith University in 1993, and a Companion of the Order of Australia (AC) in 2004.

They have three children, Barry Allan (deceased 1967), Ross and Kerri, and three grandchildren, Claire, Emily and Lyndon.