[jimz]

Forgot to answer your actual question: Delta does directly handle its ramp operations at ATL, as well as at BOS, CVG, DTW, MSP, MIA, and SEA. But in the US there are state and federal labor laws to consider and where possible, they, like the other major airlines, offload a lot of staffing generally to Unifi or similar specialist staffing agents. Unifi used to be part of Delta until spun off and sold around 2018 if I remember correctly. Beforer then they were called Delta Global Staffing and primarily handled temp hiring. Now it is 49% owned by Delta but covers hiring for United and Alaska and a few others where possible, and provides the training and certs and all that as well, temp or full time, where possible, including some ramp positions at ATL. SLC, LAX, LGA, JFK are all Delta hubs and positions for ramp agents are entirely absent on Delta's career's page, but on Unifi there are pages and pages that cover almost everywhere in North America where Delta flies. Compare Unifi's open careers page: https://unifi.avature.net/careers to Delta's: https://delta.avature.net/en_US/careers and it should be pretty obvious as to the difference.

This is a bit of generally not very useful osint info but a subdomain search on HR platforms can reveal at least to some degree the labor situation at a lot of entities. avature has over 4000 subdomains in their dns records on securitytrails alone. Not all are for staging or VPN access or SMTP. Some are no longer active, but most do resolve. That's medium potatoes at best compared to the 10k+ at bamboohr. Although if you are doing OSINT you're probably not going for a job at a lot of these staffing agencies anyway. Ever since I was asked to leave a Cutco presentation in 2011 I haven't applied for a job since and I've been poached multiple times and am basically retired at 37. But this is a neat trick and I like dataset gathering for its own sake, and it definitely gives off an interesting view of the economy that may or may not reflect how any one feels about how things are going.

(If I need a job, I prefer fangraphs or baseballprospectus anyway, but they aren't hiring anyone who filed tax returns as professional gambler, sadly)