Most colleges and universities have employment listings on their web sites, so if there are specific places you're interested in, go directly to their sites to start. You could also search more generally for "academic computing" jobs. If there's a specific field you have expertise in, or just a strong interest in, you could also email the heads of departments or labs to ask them if they might have a need you could fulfill (often they don't even list such openings, especially if they're temporary or part-time); those folks are not exactly inundated with emails from interested job-seekers, so your email will stand out and is unlikely to perturb them.

Whoa, that's really cool. I had no idea. Thanks for this!