Board of Directors

Dr. B. David Green - Chairman

Dr. Green provides both technical and strategic guidance for program development, performance, maturation, and transition to application across all Enterprises in our company. His responsibilities include investments, partnerships, acquisitions and divestitures. He played a central role in our company becoming 100% employee owned in 2011. After beginning at PSI in 1976, he has held positions of increasing technical and management responsibility before becoming President in 2007. He holds a B.S in Chemistry from the University of Pennsylvania and a Ph.D. in Physical Chemistry from M.I.T.

Mr. William E. Walsh- President, Finneigeas, LLC
William E. Walsh is the President of Finneigeas, LLC, a sole proprietorship providing consulting support in the areas of general management, strategic planning and business development. He started this business in 2008 and provides support primarily to companies in the defense sector.

From 2004 to 2008 Mr. Walsh was Vice-President and General Manager of Lockheed Martin-Marion in Marion, MA, a $125M business unit of the Lockheed Martin Corp. The Marion business was formerly Sippican, Inc. Mr. Walsh was President and CEO of Sippican from 1994 to 2004.

Mr. George E. Caledonia- Past President and CEO of Physical Sciences

George Caledonia has served on the PSI Board of Directors since 1997 and as Chairman of the Board from 2009 to 2020. He began his career at PSI in 1973 and became President of the Company in 1988 and CEO in 1999 until his retirement in 2007. Prior to PSI, Mr. Caledonia was at Avco Everett Research Laboratory.

Mr. Caledonia is a member of the American Chemical Society and was an Associate Fellow of the American Institute of Aeronautics and Astronautics and was a member of the American Physical Society and the American Geophysical Union. In 1979, he was co-winner of the Marcus O'Day Memorial Award presented by the Air Force Geophysics Laboratory.

Mr. Steven R. Genestreti - Chief Financial Officer, Treasurer

Steve joined PSI in 1990 with a background in high tech manufacturing. Steve became CFO in 1997 and became a Director in 2009. He oversees PSI’s financial and administrative management, including Finance and Accounting, Human Resources, Legal, Tax and Treasury functions. Steve played a lead role in the acquisition of PSI’s subsidiaries and in the spinoff and financing of several PSI technologies. He holds a BS in Finance from the University of New Hampshire and an MBA from Babson College.

Dr. William A. Ribich - President, Technology Solutions Group
At Foster-Miller, Dr. Ribich has held senior management positions including Vice President of Marketing, Vice President of Internal Research and Development, and Board member of the parent company and subsidiaries. He was named President in January 2001. Under his direction, Foster-Miller grew by 240% before its acquisition by QinetiQ in November 2004.

After its acquisition by QinetiQ, Dr. Ribich continued to direct Foster-Miller and led the formation and growth of the Technology Solutions Group. It provides a range of defense/security products including robots, armor, and precision air drop systems as well as sophisticated technical services to the DoD, Government and commercial clients.

Mr. Donald Romine

Mr. Romine is results-oriented senior executive with extensive experience in business growth and development, leadership in the development and execution of strategy, building an effective leadership team, and cultivating a healthy organization culture. He has demonstrated success spanning over 40 years in key leadership roles that include business development, technical leadership, international experience, and whole-enterprise financial responsibility.

In 1993, in collaboration with the company founder and key consultants, Mr. Romine developed a Purchase & Sale transaction to transfer 100% ownership of the company to the Web Industries ESOP Trust. This transaction was completed in 2000. Web Industries ESOP was first established in 1985. Mr. Romine continues to serve as one of three internal ESOP trustees.

Dr. William J. Marinelli - President and Chief Operating Officer

Bill Marinelli came to PSI from a postdoctoral position at Cornell University after receiving a PhD in Physical Chemistry from the University of California, Berkeley. His research activities at PSI ranged from upper atmospheric chemistry and chemical kinetics to spectral imaging technologies supporting chemical, biological, radiological, nuclear, and explosives defense. As a senior manager, he had oversight responsibilities for many of PSI’s efforts in materials development, tactical imaging, energy and propulsion technology, and nuclear detection. In his current role as President and Chief Operating officer, he leads PSI corporate business planning activities while having direct oversight of technology transition within its Applications Division.

Lauren Jennings, Esq.

Laruen Jennings has 35 years in corporate legal practice at Boston law firms, with including managing partner for eight years. Since January 2021, she has been an independent advisor to business owners and executives, consulting corporate attorney and law firm management consultant.

Ms. Jennings has been on various boards of directors, including: Physical Sciences Inc. – 2021-present, Board Chair and Treasurer of Island Readers & Writers - 2008-2017, Board Chair and Director of The Boston Philharmonic Orchestra – 2005-2010, Director of The Commonwealth Institute - 2016-2019, and Chair Municipal Advisory Council, Frenchboro, Maine – 2016-present

Dr. Harlan Spence

Professor Spence serves or has served as Principal Investigator (PI) or co-I on numerous NASA, NSF, NOAA, DARPA, and DOD theory, analysis, hardware, and mission contracts and grants of increasing scope and complexity for over ~35 years of his professional career. He is a Fellow of the American Association for the Advancement of Science.

Dr. Spence recently served on the Board of Trustees of the University Corporation for Atmospheric Research, is a member of the NAS Space Studies Board, and is a member of the American Geophysical Union’s Space Physics and Aeronomy Advocacy Committee. In 2010, Dr. Spence was named the third Director of the Institute for the Study of Earth, Oceans, and Space (EOS) at UNH. As Director, Dr. Spence is a member of UNH’s Provost Council. During his more than a decade as EOS Director, Dr. Spence oversaw a major reorganization of the Institute’s business service center.