Marcus Jeffery

Marcus Jeffery: Email & Phone Number

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Cyber Security Engineer at AT&T|San Francisco, California, United States

Position:

Cyber Security Engineer at AT&T

Location:

San Francisco, California, United States

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Last updated: 2026-03-03
Updated: 2026-03-03

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Work Experience 14 years

Cyber Security Engineer at AT&T

Jan 2025 - Current

Cyber Security Analyst at BrightGate Technologies

Mar 2018 - Sep 2024

Information Security Engineer at Netsecure Systems

Jan 2016 - Feb 2018

Cyber Security Consultant at SiliconLink Group

Jul 2014 - Dec 2015

Security Operations Center Analyst at Emergent Logic

Jun 2013 - Jun 2014

Network Security Engineer at Skyvolt Digital

Jun 2012 - May 2013

Marcus Jeffery started working in 2012, then the employee has changed 5 companies and 5 jobs. On average, Marcus Jeffery works for one company for 2 years 3 months.

Their professional focus is Accessible Design, Cloud Security, and Computer Literacy across 3 core areas.

Education

Master's Degree at New York University - Polytechnic School of Engineering

Bachelor's Degree at University of Illinois Urbana-Champaign

Frequently Asked Questions

What is Marcus Jeffery's email address?

SignalHire found a verified business email address for Marcus Jeffery: m******y@att.com.

What is Marcus Jeffery's phone number?

SignalHire found a verified phone number for Marcus Jeffery: +1-***-***-0528.

How do I contact Marcus Jeffery at AT&T?

You can reach Marcus Jeffery 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 Marcus Jeffery's professional background?

Marcus Jeffery has 14 years of professional experience. They have held roles including Cyber Security Analyst, Information Security Engineer, and Cyber Security Consultant at companies such as BrightGate Technologies, Netsecure Systems, and SiliconLink Group. Their education includes Master's Degree from New York University - Polytechnic School of Engineering, and Bachelor's Degree from University of Illinois Urbana-Champaign.

Is Marcus Jeffery's contact information up to date?

Yes. Marcus Jeffery's SignalHire profile was last updated on 3 March 2026, reflecting their current position as Cyber Security Engineer at AT&T in Dallas, TX, United States.

Marcus Jeffery Namesakes

Name
Company
Position
Marcus Jeffery
Technician
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