Walsh performed in regional theater in the 1960s, first as a prop man. Being partially deaf in one ear and with an accent harkening from Vermont made it clear to Walsh: "I wasn't going to do
Shaw and
Shakespeare and
Molière — my speech was simply too bad." He brought a "delightfully menacing presence" to his characters. He was a no-nonsense worker bee in the film industry. Walsh characterized himself as approaching "each job thinking it might be my last, so it better be the best work possible. I want to be remembered as a working actor. I'm being paid for what I'd do for nothing." and the 1978 crime film
Straight Time, in which he played a vicious parole officer opposite Dustin Hoffman. He characterized
Blade Runner as being especially difficult and tiresome to make, given director
Ridley Scott's insistence on perfection. As a hard-bitten police commander, Walsh's character brings Deckard (Harrison Ford) out of retirement to "retire" cyborgs, telling Deckard, "I need your magic."
Pauline Kael praised Walsh's performance: "his broad buffoonery helps to ground the picture, to keep it jaundiced and low-down." He then reteamed with the Coen brothers for
Raising Arizona (1987) as a memorable "yakking machine shop worker". He appeared in an episode of the
NBC drama series
Gibbsville in 1976 and
Little House on the Prairie in 1981. Later appearances included the series
Sneaky Pete and
The Righteous Gemstones. He was a member of the
Screen Actors Guild,
Actors Equity, the
Academy of Motion Picture Arts and Sciences, and
The Television Academy. ==Legacy and accolades==