On August 5, 2023, Casa Systems, Inc. appointed Philip E. Paro, Jr. to serve as the Company?s principal accounting officer and to the positions of Vice President and Chief Accounting Officer, effective as of September 5, 2023 the (?Effective Date?). Edward Durkin, the Company?s Chief Financial Officer and principal accounting officer, will no longer serve as the principal accounting officer effective as of the Effective Date, but will remain the Company?s Chief Financial Officer. In connection with Mr. Paro?s appointment as Vice President and Chief Accounting Officer, the Company entered into an offer letter (the ?Paro Agreement?) which provides for a starting annual base salary of $285,000.04, a yearly discretionary performance bonus, with the target amount being 40% of Mr. Paro?s base salary, and, subject to the approval of the Compensation Committee of the Board of Directors of the Company, a one-time sign-on equity award consisting of $101,000 of restricted stock units of common stock of the Company, subject to the terms and conditions of the Company?s 2017 Stock Incentive Plan and the applicable restricted stock unit agreement.

Mr. Paro will also be eligible to participate in the Company?s sponsored benefits provided to other Company employees of similar rank and tenure, subject to the terms and conditions of such policies and programs. The foregoing summary of the Paro Agreement is qualified in its entirety by reference to the full Paro Agreement filed herewith as Exhibit 10.1 and incorporated by reference herein. Prior to joining the Company, Mr. Paro, age 41, served as Director, Global Controller at The Companies, d/b/a Tomorrow.io, since May 2022. From January 2021 until May 2022, Mr. Paro served as the Worldwide Controller for Fuze until and immediately following its acquisition by 8x8 .

Prior to that, he was the Director and then Senior Director, Revenue Operations at Actifio from January 2017 until January 2021, until its acquisition by Google Cloud. He also previously served in financial positions at Fleetmatics (NYSE: FLTX) until its acquisition by Verizon, Hologic, and Acme Packet until its acquisition by Oracle. He earned a bachelor of science in accounting and a master of science in administrative studies from Boston College.