Peter Petrigno holds a Bachelor of Science in Secondary Education and Political Science from Boston State College, complemented by a Master of Education degree and post-graduate studies at the University of New Hampshire. He spent nearly two decades as a social studies teacher and department head, culminating in recognition as New Hampshire Teacher of the Year in 2000 and the Nashua NH area’s No Bell Outstanding Educator’s Award in 2003. Petrigno's career also includes founding the North End Historic District Committee, which successfully influenced zoning ordinances in Boston. Following his retirement from teaching, he continued to engage in education as an adjunct professor and was elected to the New Hampshire House of Representatives in 2018.

Peter Petrigno's political philosophy is deeply rooted in localism and community preservation, as evidenced by his efforts to limit gentrification in Boston's North End. His unique ideological positioning combines progressive community advocacy with a localized approach to economic policy. Petrigno's rhetorical style emphasizes the importance of neighborhood identity and historical preservation, often framing issues in a way that highlights the tension between development and community integrity. His legislative record reveals an unexpected convergence with opposing factions on environmental regulations, showcasing a highly calculated approach to protecting regional industrial interests. Petrigno's career as an educator informs his policy stances, revealing a strategic thinker who balances ideological consistency with pragmatic community needs.