John Cullen is an Associate at Assembly Ventures and a 2023 Venture for America Fellow. He graduated from Georgetown's McDonough School of Business and leads market sector research reports and event operations.
At firms with a similar stage, sector and check size.





One email when John's firm raises a fund, adds a partner or shows new activity.

Raising a pre-seed or seed round? We write $1M to $5M first checks and help founders with distribution. A partner reads every deck.
Send your deckJohn Cullen is an Associate at Assembly Ventures and a 2023 Venture for America Fellow. He graduated from Georgetown's McDonough School of Business and leads market sector research reports and event operations.
Assembly Ventures has not reported a check size. It invests at seed, series a, series b.
Email [email protected], the firm's inbox for founders, and name John in the subject. A warm intro from a founder Assembly Ventures backed works better.
Fellow at Venture for America.
Last updated 2026-10-15. Is this you? Ask for a correction.