David Harrison: Email & Phone Number

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Physical Security Subject Expert at General Dynamics Information Technology|Arlington, Texas, United States

Position:

Physical Security Subject Expert at General Dynamics Information Technology

Location:

Arlington, Texas, United States

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Last updated: 2026-05-26

Updated: 2026-05-26

Found email addresses for David Harrison:

Business emails:

d************n@gdit.com

Personal emails:

d***@northwell.edu,

h***@secretservice.gov

Found phones for David Harrison:

+1-323-***-**47,

+1-480-***-**47,

+1-623-***-**72,

+1-623-***-**49

A different David Harrison?

Work Experience 37 years

Physical Security Subject Expert at General Dynamics Information Technology

Aug 2024 - Current

Assistant to the Special Agent in Charge, Counter Surveillance Divison at U.S. Secret Service

Apr 2021 - Apr 2023

Assistant to the Special Agent in Charge, Counter Surveillance Division at U.S. Secret Service

Oct 2017 - Apr 2021

Special Agent Operations and Training Backup, Counter Surveillance Division at U.S. Secret Service

Feb 2017 - Oct 2017

Special Agent Bravo Squad Backup, Counter Surveillance Division at U.S. Secret Service

Feb 2014 - Feb 2017

Special Agent, Presidential Protective Division at U.S. Secret Service

Apr 2009 - Feb 2014

Special Agent, Dignitary Protection Division at U.S. Secret Service

Feb 2009 - Apr 2009

Special Agent, Washington Field Office at U.S. Secret Service

Apr 2002 - Feb 2009

Officer, Secret Service Uniformed Division-White House Branch at U.S. Secret Service

Nov 1995 - Apr 2002

Assistant Buyer at Lenox Hill Hospital

Jun 1993 - Oct 1995

U.S. Navy, Petty Officer 3rd Class at US Navy

Oct 1989 - Sep 1992

Their professional focus is Access Control, Aerial Surveillance, and Aircraft Surveillance Tracking across 3 core areas.

Education

Bachelor of Administration of Justice at George Mason University

Associate's degree at Northern Virginia Community College

Bachelor of Applied Science - BASc at George Mason University

Frequently Asked Questions

What is David Harrison's email address?

SignalHire found verified email addresses for David Harrison, both business and personal. Their business email is d************n@gdit.com, and personal emails include d***@northwell.edu, and h***@secretservice.gov.

What is David Harrison's phone number?

SignalHire found multiple verified phone numbers for David Harrison: +1-323-***-**47, +1-480-***-**47, and +1-623-***-**72.

How do I contact David Harrison at General Dynamics Information Technology?

You can reach David Harrison through SignalHire by unlocking their verified email and direct phone number (free signup, no credit card needed). SignalHire is the fastest route if you need their contact details immediately.

What is David Harrison's professional background?

David Harrison has 37 years of professional experience. They have held roles including Assistant to the Special Agent in Charge, Counter Surveillance Divison, Assistant to the Special Agent in Charge, Counter Surveillance Division, and Special Agent Operations and Training Backup, Counter Surveillance Division at companies such as U.S. Secret Service, U.S. Secret Service, and U.S. Secret Service. Their education includes Bachelor of Administration of Justice from George Mason University, and Associate's degree from Northern Virginia Community College.

Is David Harrison's contact information up to date?

Yes. David Harrison's SignalHire profile was last updated on 26 May 2026, reflecting their current position as Physical Security Subject Expert at General Dynamics Information Technology in Falls Church, Virginia, United States.

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