Born in Dresden, Germany, Koenig emigrated to Canada with his family in 1937, when they fled Nazi Germany. They settled in 145-acre (0.59 km2) farm along the Grand River, outside what is now known as Cambridge, Ontario. In 1948, a local representative for the Canadian department of agriculture needed the family's tractor to demonstrate a new tree-planting machine. As the young Koenig pulled the machine across a field, he noticed a small film crew from the NFB's former agricultural film unit, recording the demonstration. After filming was complete, he approached the men, who included director Raymond Garceau, and told them he loved films, especially animation, and hoped to work in filmmaking. They suggested he send in a job application and approximately six weeks later he received a letter offering him the position of a junior splicer for $100 per month.[2][3]
His younger brother Joe Koenig was also a filmmaker.
Koenig made major contributions to a range of notable projects. He was also the cinematographer for Arthur Lipsett's Experimental Film (1963) and N-Zone (1970), both admired by George Lucas.
Koenig retired from the NFB in 1995 to Westport, Ontario, where he made furniture and remained sporadically active in film.
He received numerous honours awards during his career, including a 1984 Genie Award for Best Theatrical Short as producer of Ted Baryluk's Grocery and six Canadian Film Awards: Film of the Year and Best Arts and Experimental Film for City of Gold, Film of the Year and Best General Information Film for Lonely Boy, Best TV Information Film for Stravinsky and Best Documentary Short Film for The Hottest Show on Earth (1977).
Koenig died June 26, 2014, in Toronto[3][4] at the age of 86.