He said that his retirement is bittersweet since he's worked there for so long.
"I certainly don't want to be carried out, and in a few cases I've seen that happen with colleagues," said Hallenstein.
He said that he's had some great mentors in his professional career, through the JCC, other agencies and Niskayuna, but that he is ready to retire.
"It's just time, you know?" said Hallenstein.
He said that he wants to be remembered as a mensch, which is a Yiddish word that means "a person of integrity and honor."
Hallenstein's career isn't over. He plans on using his abilities in a professional role to assist not-for-profits and small businesses develop their resources.
Mark Weintraub will take over for Hallenstein on Monday, July 6, as executive director. Hallenstein plans on helping him make the transition over the next month or so.