Gary Schierman: Email & Phone Number

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Cyber Detection Engineer at WarCollar Industries, LLC|Warrenton, Virginia, United States

Position:

Cyber Detection Engineer at WarCollar Industries, LLC

Location:

Warrenton, Virginia, United States

View Gary Schierman's Email

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Last updated: 2026-10-25

Updated: 2026-10-25

Found email addresses for Gary Schierman:

Business emails:

g********n@warcollar.com

Personal emails:

g***********n@protonmail.com,

t******n@gmail.com,

g********n@gmail.com

Found phones for Gary Schierman:

+1-623-***-**27,

+1-480-***-**72,

+1-323-***-**12,

+1-909-***-**33

Prospect analytics

Current work details

DepartmentComputer & Network Security

Availability

TimezoneEST

Best time to contact12:00 PM – 4:00 PM

A different Gary Schierman?

Work Experience 43 years

Cyber Detection Engineer at WarCollar Industries, LLC

Apr 2024 - Current

Penetration Tester at WarCollar Industries, LLC

Jun 2023 - Apr 2024

Team Lead for Cloud-focused Cyber Team at MANTECH

Sep 2022 - Jun 2023

Cyber Engineer, Expert at MANTECH

Apr 2022 - Jun 2023

Senior Principal Cyber Threat Analyst - APT Hunt SME at MANTECH

Aug 2019 - Jun 2023

Cyber Threat Network Analyst at AT&T

Jan 2019 - Aug 2019

Cyber Threat Hunter at TSYS

Sep 2018 - Jan 2019

Cyber Threat Analyst at ManTech International Corporation

Oct 2017 - Sep 2018

Cleared Cyber Security Specialist at Federal Government

Jan 1989 - Sep 2017

SIGINT Analyst at US Army

Sep 1983 - Jul 1987

Gary Schierman started working in 1983, then the employee has changed 6 companies and 9 jobs. On average, Gary Schierman works for one company for 4 years 4 months.

Gary is proficient in Czech and German. Their professional focus is active ts/sci clearance, Analytical Skills, and Azure Sentinel across 3 core areas.

Gary holds Certified Forensic Analyst (GCFA), Splunk Certified User, and Micro Certification - Incident Management certifications.

Education

BSci at Eastern Washington University

University of Puget Sound

Defense Language Institute Foreign Language Center

Frequently Asked Questions

What is Gary Schierman's email address?

SignalHire found verified email addresses for Gary Schierman, both business and personal. Their business email is g********n@warcollar.com, and personal emails include g***********n@protonmail.com, t******n@gmail.com, and g********n@gmail.com.

What is Gary Schierman's phone number?

SignalHire found multiple verified phone numbers for Gary Schierman: +1-623-***-**27, +1-480-***-**72, and +1-323-***-**12.

How do I contact Gary Schierman at WarCollar Industries, LLC?

You can reach Gary Schierman 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 Gary Schierman's professional background?

Gary Schierman has 43 years of professional experience. They have held roles including Penetration Tester, Team Lead for Cloud-focused Cyber Team, and Cyber Engineer, Expert at companies such as WarCollar Industries, LLC, MANTECH, and MANTECH. Their education includes BSci from Eastern Washington University, and University of Puget Sound.

Is Gary Schierman's contact information up to date?

Yes. Gary Schierman's SignalHire profile was last updated on 25 October 2026, reflecting their current position as Cyber Detection Engineer at WarCollar Industries, LLC in Reston, Virginia, United States.

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Jack Welsh

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David Kerr

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Dimis Christophy

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Matthew Wood

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Doug Emerald

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Andrew Shenouda

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