Event staffing company for live events, sports and concerts.
Why I recommend it: From your list. I couldn't confirm pay, W-2 status, hiring locations or how to apply: its page I could read has only a company description. Check the site's careers or staff signup before you rely on it.
Staffing firm that places contract and contract-to-hire workers in finance, accounting and technology. You upload a résumé or apply to listings.
Why I recommend it: The most tech-relevant staffing agency on this list. Its page doesn't mention part-time roles, W-2 status or candidate fees. Ask the recruiter. Expect to need relevant experience.