Originally from Queens, New York, Sirotkin went to the Wharton School of the University of Pennsylvania and the Sturm College of Law.
Sirotkin met Sally Fox while taking a class in preparation for the Colorado bar exam.
[13][4] Before Fox died, she suggested Sirotkin seek appointment to her seat in the Senate.
[14] Following Fox's death, the Chittenden County Democratic Party voted to recommend that Governor Peter Shumlin appoint Sirotkin to the vacant seat in the Senate.
[20] Sirotkin came in sixth place, winning election for a full term in the Senate.