 GLENDALE, Calif.--BUSINESS WIRE--PS Business Parks, Inc. NYSE:PSB the Company announced today that its Board of Directors elected M. Christian Mitchell to the Board of Directors effective October 4, 2021. Mr. Mitchell, 66, serves as a Managing Partner of THG Advisory Services, LLC, an alternative investment and advisory firm. Mr. Mitchell is a retired senior partner at Deloitte Touche LLP where he served as the national or regional managing partner for various practices of the fir 