Effective as of January 1, 2023 and as unanimously decided by the Board of Directors (the “Board”) of TCR2 Therapeutics Inc. (the “Company”), Peter Olagunju was appointed as Chief Operating Officer of the Company. Mr. Olagunju previously served as the Company's first Chief Technical Officer from August 5, 2021 until December 31, 2022 where he oversaw process development, manufacturing, quality control and technical operations for the Company's TRuC-T cell programs and emerging pipeline. Prior to joining the Company, from March 2020 to July 2021, Mr. Olagunju was Senior Vice President of Technical Operations at FerGene Inc., where he led the technical operations function for the commercialization of a gene therapy for bladder cancer.

Before that, from 2015 to March 2020, Mr. Olagunju held several roles of increasing responsibility at bluebird bio Inc., including serving as Vice President of Global Patient Operations where he was the program lead and functional head of manufacturing supporting the European approval for ZYNTEGLO®, a transformational gene therapy for Transfusion dependent Thalassemia. Earlier in his career, he held senior positions in Commercial Technical Operations and served as the Head of Quality at Dendreon Corp. and ZymoGenetics Inc. Mr. Olagunju will be entitled to those severance and benefits provided in connection with his existing employment agreement with the Company, as described in the Company's definitive proxy statement for its 2022 annual meeting of stockholders filed with the Securities and Exchange Commission on September 1, 2022.

In connection with his promotion to Chief Operating Officer, Mr. Olagunju's annual base salary will be increased to $450,000 and he will be eligible for an annual bonus with a target amount of 40% of his base salary. Mr. Olagunju is also eligible to participate in the Company's employee benefit plans available to its employees, subject to the terms of those plans.