DMA Industries interview questions

Third party recruiter (Whalen Search Group) reached out to me via LinkedIn. They forwarded my resume to the DMA Industries. Had two zoom calls with the hiring manager and with their CEO and COO. They flew me onsite for an in-person interview. Then ghosted me, I reached out to both DMA and Whalen Search Group for a follow-up but received a very rude email from Whalen. Overall, this company has no regard for candidates as I took two days of PTO to interview here, and they couldn't even give me the courtesy of a "Thanks but no thanks email".