Dear Dr. XXXXXX:
Dr. XXXX XXX is due to be reviewed for (select as appropriate: Associate Professor with tenure/promotion to the rank of Professor) in academic year YYYY-YYYY. We are developing a list of external evaluators for (select as appropriate: his/her/their) case, and you were recommended as an eminent scholar in (select as appropriate: his/her/their) field. I am emailing you now to ask about your availability.
Would you be willing to serve as an external evaluator for Dr. XXX, and if so, would you be able to evaluate (select as appropriate: his/her/their) case and submit your review letter no later than (date)?
We would send you Dr. XXX’s CV, (his/her/their) personal statement, examples of (select as appropriate: his/her/their) scholarship, and the department’s promotion criteria by (date).
Thank you very much for your consideration, and I would be grateful if you could respond by (date) concerning your availability.