Unitil Corporation announced the planned retirement of Mark H. Collin, Senior Vice President, Chief Financial Officer and Treasurer, effective May 1, 2019, capping a remarkable career spanning 34 years in the utility, financial management and regulatory spheres. Mr. Collin has served as Unitil's corporate Treasurer since 1998 and has been the Chief Financial Officer since 2003. Prior to joining Unitil in 1988 Mr. Collin worked for the New Hampshire Public Utilities Commission as an economist and utility analyst.

Concurrently, Unitil is announcing the hiring of Christine L. Vaughan, CFA as Senior Vice President, Financial and Regulatory Services, effective January 2, 2019, as Mr. Collin's planned successor. As part of Unitil's long term succession plan, Mr. Collin will formally step down as Chief Financial Officer and Treasurer on March 1, 2019, and will work with Ms. Vaughan in order to assure a smooth transition period prior to his retirement. Ms. Vaughan will assume the title of Senior Vice President, Chief Financial Officer and Treasurer of the Company on March 1, 2019.

Ms. Vaughan most recently served as Vice President, Rates and Regulatory and Treasurer for Eversource Energy in Massachusetts, where she had been employed since 2004. Ms. Vaughan previously worked as a management consultant at Arthur D. Little and an engineer at DuPont and BASF.