A loan processors job might differ depending on the company and it's policies.
Most processors are the contact between their office and the lending office.
The take the information a loan officer provide, enter it into the compaies software processing (LOS) Before submitting the loan to the lender they decide where the loan would best be approved.
They then check to see if the loan documents that are there meet the minimum requirements to submit to the lender's underwriting department.
If so they perpare the loan for submission that include the loan application with all the RESPA documents signed as required and dated as required, along with the appraisal, credit report, title documents with any supplements, and escrow documents with any possibe amendments.
Once the loan is approved, if there are conditions or stips the processor then work with the loan officer to obtain these conditions so as to obtain final approval of the loan file.
This takes a lot of time in coordinating with the loan officer, the applicant, other professionals such as the appraiser, escrow, title and other needed to get the loan into final approval.
Once all the documents required by the underwriter has been submitted and approved by the underwriter the processor then coordinate and order the loan docs to be sent, signed and notorized with the title company, escrow company and doc signer if needed.
Those are the basics that a processor do. Ther might be other things that a processor will need to do to get a loan application file approved, but are too many to list here.
A good processer anticipate problems and solve them before theybecome problems.
Normally a person start out as a junior processor. In this position the junior processor do the mundane things like order the appraisal, credit report, open title and escrow for all files before the file is given to the processor.
Some companies require that the loan officer do these things before passing the loan file application to the processor.
I hope this has been of some use to you, good luck.