A Chase Bank employee siphoned more than $271,000 from customer accounts, authorities said yesterday.

Donnie McMillan, 26, who worked at the bank branch at 214 Broadway, accessed the personal data — including Social Security numbers — of at least 30 clients before withdrawing the cash. He then allegedly provided 50 other customer profiles to two unidentified accomplices.

Another Chase employee uncovered the alleged scam, and McMillan was arrested Friday.