He says his team chooses from "hundreds and hundreds" of doodle ideas to work with and is on track to have completed about 300 by the end of 2012.
Germick says the Canadarm doodle took "several tens of hours" to complete.
The Canadarm had its first mission on Nov. 13, 1981 on the U.S. space shuttle Columbia.
"For doodles we really try to sort of celebrate things that are exciting to Google as a culture and we think will be exciting for our users," says Germick.
"We're big proponents of technology and innovation and knowing this is one of the really cool things that Canada has done for space technology we thought it would be the perfect thing to celebrate."