Complete your application. Fill out all the required fields and answer any questions to the best of your ability.In my experience HR can take any time from a week up to a month to respond with a letter and formal offer or acceptance. Following receipt of a tentative selection letter, you must complete preemployment requirements. You've landed the job! Now it's time to write your acceptance letter. We will build out your profile as you apply for a job — so fill out all the fields completely, honestly, and accurately. After completing one year of neurosurgery residency training, I decided to follow my passion for medical writing.