Boston’s new Mayor Martin “Marty” Walsh announced January 4 via Twitter that he has chosen Daniel Arrigg Koh ’03 as his Chief of Staff.
> Excited to welcome Chief of Staff [@dank](https://twitter.com/dank) to the Walsh Administration: [http://t.co/AG9GF4arbP](http://t.co/AG9GF4arbP) [#bosmayor](https://twitter.com/search?q=%23bosmayor&src=hash) [#bospoli](https://twitter.com/search?q=%23bospoli&src=hash)
> — Martin J. Walsh (@marty_walsh) [January 4, 2014](https://twitter.com/marty_walsh/statuses/419570957867839488)> I’m honored to join [@marty_walsh](https://twitter.com/marty_walsh) as we begin this new chapter in Boston’s history. [#bosmayor](https://twitter.com/search?q=%23bosmayor&src=hash)
> — Daniel Arrigg Koh (@dank) [January 4, 2014](https://twitter.com/dank/statuses/419551359491260416)
Walsh became Boston’s 54th mayor at 10 a.m on Monday, January 6 when he was sworn into office.
Koh was the general manager of HuffPost Live, a live-streaming network run by the Huffington Post. Koh previously served as chief of staff for Arianna Huffington at the Huffington Post. Immediately prior, he served as an Advisor to outgoing Boston Mayor Thomas Menino.
After graduating from Andover, Koh attended Harvard College and Harvard Business School.