On March 8, 2017, the Board of Directors of Proteostasis Therapeutics, Inc. elected Brett Hagen, the company's Vice President of Finance, Controller, Assistant Treasurer and Principal Accounting Officer, to the additional position of Principal Financial Officer. Mr. Hagen, age 43, has been serving as the company's Controller since May 2016, Principal Accounting Officer since August 2016, Assistant Treasurer since October 2016, Vice President of Finance since February 2017, and Principal Financial Officer since March 2017. Previously, Mr. Hagen served as the controller for BIND Therapeutics, Inc., Vice President, Finance/Segment Controller of Boston Private Financial Holdings, Manager of SEC Financial Reporting and Technical Account of The Princeton Review, Controller of BioProcessors Corporation and held a number of positions at PricewaterhouseCoopers LLP.