As a lawyer I would not simply respond with an evaluation; you have to show that the job is "in your field" and 3.4 years of IT experience is not equivalent to an IT degree. I would include a memorandum of law must be prepared to show that as a matter of law, the mech eng. degree is "in the field" of IT, due to the job duties.
Also, an expert affidavit might be obtained that goes over any core coursework that is common between IT and mech eng, (perhaps by finding an IT-related degree) etc.
We've been seeing a lot of scrutiny on this issue, as well as the "third party job shop" issue, the "specialty occupation" issue, and the "organizational complexity" issue.
But simply responding with a mech eng evaluation is probably a very risky move.
Hassan M. Ahmad, Esq.
The HMA Law Firm