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Grad recommendations aren’t the same as the ones you gathered for college. Programs want people who can vouch for your ability to do graduate-level work — usually professors and research supervisors. Here’s who to ask, and how to set them up to write you a strong letter.
Professors who know your work
The strongest grad recommendation comes from a professor who supervised your research, advised a thesis, or taught you in a small upper-level course — someone who can speak to how you think, not just that you earned an A. Academic letters carry the most weight for research programs.
Research or lab supervisors
A PI, postdoc, or grad student who oversaw your lab or research work can attest to exactly the skills grad programs want: independence, rigor, persistence. Hugely valuable even if they’re not your professor of record.
A manager — only when relevant
For professional programs (MBA, MPH, MSW), a supervisor who can speak to your judgment and impact may fit. For a research PhD, an academic letter almost always beats a job reference.
Hand your recommenders a packet
The easier you make it, the better the letter. Give each recommender what they need to write a specific, persuasive letter rather than a generic one:
Phrase the ask as "Would you be able to write me a strong letter of support?" — it gives a lukewarm recommender a graceful way to decline, which protects you from a flat letter. Ask weeks ahead of the earliest deadline, and send a gentle reminder a week out. A specific letter from someone who knows your research beats a glowing one from a famous name who barely knows you.
Build the application: see the full grad application, write your statement of purpose, and contrast with undergrad recommendation letters.