Denis Brennan

picture3E-mail: Contact Denis Brennan


Dr. Brennan is the Town Historian  for the Town of Niskayuna.  He brings a unique blend of historical appreciation and business practicality to his role.
Dr. Brennan and his wife have been residents of Niskayuna since 1978 and all four of their children attended and graduated from the Niskayuna School system.  After an initial career in business and a second career as an academic historian, the position of Niskayuna Town Historian offered him an opportunity to engage history from a different perspective – as a Public Historian, who seeks to engage with the public and make historical insight directly accessible and useful.  History is about more than knowing what occurred in the past, but about understanding what occurred in the past.  Thoughtful historical preservation (whether documents or domiciles) enhances that objective.
Professional Experience
  • Niskayuna Town Historian, 2018 – present
  • Visiting Professor and Lecturer at Union College, 2004 – 2019
  • Adjunct Faculty (at various local colleges), 1999 – 2004
  • Accountant and Office Manager in NYC, Schenectady, Troy, Waterford, 1964 - 1997
  • Ph.D. in History, State University at Albany, 2003
  • M.A. in History, State University at Albany, 1992
  • B.A. in History, Phi Beta Kappa, State University at Albany, 1989
Board Memberships

Board/Committee Job title Membership Status
Historical Committee Town Historian Active Membership
Architectural Review Board Liason Active Membership
Historic Preservation Committee Chairperson Active Membership