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Training Instructors

Experience That
Belongs in the Room.

Meet the practitioners, legal professionals, leaders, and specialists behind Aspirant training.

Meet the Faculty

Instructor Faculty

Direct Experience.
Clear Instruction.

Every profile uses the same structure so agencies can quickly understand the instructor’s role, background, focus, and courses.

John String headshot
Founder

John String

Executive Leadership, Internal Affairs, Policy, Accreditation, and Organizational Performance

John String is a public-safety executive and co-founder of Aspirant Consulting Group. He serves as Chief of Police and Director of Public Safety for Narberth Borough and previously served as a lieutenant and patrol watch commander with the Lower Merion Township Police Department. His experience includes staff and inspections, accreditation, field training, canine operations, policy, internal investigations, and organizational leadership. John holds graduate training in public administration and is a graduate of Northwestern University's School of Police Staff and Command, the MALEEDS Regional Command College, and the FBI-LEEDA Leadership Trilogy.

Heidi A. Ramsey headshot
Leadership and Resiliency Instructor

Heidi A. Ramsey

Leadership, Resilience, Employee Wellness, and At-Risk Personnel

Heidi A. Ramsey retired after 23 years with the Ohio State Highway Patrol, where her work included training, labor relations, legal services, human resources, leadership development, and employee wellness. She developed programs including SIGNAL, the Public Safety Leadership Academy, and Ohio ASSIST. Heidi is an attorney and an instructor for law-enforcement executives at the FBI National Academy. She holds a Juris Doctor with an employment-law concentration, a Master of Business Administration, and a Bachelor of Arts. Her instruction connects leadership expectations with the human realities of high-stress public-safety work.

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Training Instructor

Patrick Dolly

Field Training, Supervision, Curriculum Development, and Policy Implementation

Patrick Dolly is a police sergeant and training professional with experience across Pennsylvania and New Jersey. His work includes patrol supervision, curriculum development, academy instruction, policy implementation, background investigations, use-of-force review, and leadership of an agency field training program. He is a certified law-enforcement instructor in both states and has taught recruits, field training officers, supervisors, and command-level leaders. Patrick holds a Master of Science in Justice Administration and a Bachelor of Criminal Justice. His courses emphasize consistent evaluation, useful documentation, coaching, accountability, and the supervisory systems that make field training defensible.

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Senior Leadership and Training Consultant

Mark T. Williams

Frontline Supervision, Organizational Development, and Command Leadership

Mark T. Williams is a patrol sergeant with more than 20 years of progressive law-enforcement experience. He oversees around-the-clock operations and personnel across patrol, communications, records, and administrative functions. Mark also teaches at Chestnut Hill College and the Temple University Police Academy, where he develops curriculum for future public-safety professionals. He holds a Master of Science in Organizational Development and Leadership, is a graduate of Northwestern University's School of Police Staff and Command, and is pursuing doctoral study in public administration. His instruction is grounded in the daily responsibilities of frontline and command leadership.

Matt Petrillo headshot
Instructor of Crisis and Strategic Communications

Matt Petrillo

Crisis Messaging, Media Relations, Public Narratives, and Organizational Credibility

Matt Petrillo is Director of Communications for Temple University's Department of Public Safety. He previously spent more than a decade in television journalism, including reporting for CBS News Philadelphia on breaking news, crime, public safety, and major incidents. That combination gives him firsthand knowledge of how information is gathered, framed, and distributed under pressure. Matt's instruction focuses on message discipline, media relations, internal coordination, strategic storytelling, and the choices that shape trust before, during, and after a crisis. He helps leaders understand what to say, when to say it, and how communication decisions affect operations and credibility.