Greg Maddock: Email & Phone Number

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Founder at SimClient AI|St Peters, Missouri, United States

Position:

Founder at SimClient AI

Location:

St Peters, Missouri, United States

View Greg Maddock's Email

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Last updated: 2026-07-03

Updated: 2026-07-03

Found email addresses for Greg Maddock:

Business emails:

*****@gmail.com

Personal emails:

g**********k@att.com,

g****5@att.com,

g******k@att.com

Found phone for Greg Maddock:

+1-***-***-1586

A different Greg Maddock?

Work Experience 28 years

Founder at SimClient AI

Dec 2025 - Current

Acting Director / Principal Leader– Corporate Security / Cybersecurity at AT&T

Dec 2018 - Current

Principal Leader – Vendor Management & Third-Party Security Governance at AT&T

Jun 2011 - Feb 2018

Vendor Management - Technology Development at AT&T

Oct 2006 - Jun 2011

Various at AT&T

Jul 1998 - Jan 2006

Greg Maddock started working in 1998, then the employee has changed 1 company and 4 jobs. On average, Greg Maddock works for one company for 5 years 5 months.

Their professional focus is Access Control, AI Automation, and Analytic Problem Solving across 3 core areas.

Greg holds Neurolinguistic Programming Master Practitioner, Certified Hypnotist (CH), and Information Security Leadership Track (CISSP Domains) certifications.

Education

Bachelors at Missouri Technical College

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