Fred Alger & Company Inc., a broker-dealer based in New York City, is expanding its business with the addition of two new officers, Alger announced Tuesday.

Eric Seidman has been appointed vice president, and Jeff Vigilante assistant vice president in the defined contribution investment-only channel. The additions will enhance Alger’s ability to partner with and support defined contribution investment-only platforms, financial advisors, and intermediaries, Alger says.

Seidman was most recently vice president, account manager in retirement investment solutions at Prudential Financial Inc.

Vigilante was a retirement specialist for the defined contribution investment only channel at Prudential Investments.