tipically follows like this
US BCIS
RE: Dr. XXX, Job Verification
Dear Sir/Madam;
This is to certify that Dr XXX(Employee ID XXX) is a fulltime permanent employee at the XXXat the University of XXX. He is currently working as Research Associate at the Department of XXX. He joined this position on XXX and was offered to work on this position for an indefinite time. Along with the salary, Dr XXX is awarded several benefits such as health insurance, retirement plans, and tuition reduction. we also wish to certify that Dr. XXX (ur boss) and the Director of Research at the XXX had full authority to hire Dr. XXX as a Permanent Research Employee in their research laboratory.
If you have any questions, please contact me XXX
Sincerely,