Justin L.
AeroLeads people directory · profile

Justin L. Email & Phone Number

Expert Cybersecurity - FirstNet | Linux Enthusiast | Problem Solver at AT&T
Location: Louisville, Kentucky, United States 4 work roles 1 school
LinkedIn matched
✓ Verified August 2026 3 data sources Profile completeness 86%

Contact Signals

LinkedIn Profile matched
3 free lookups remaining · No credit card
Current company
Role
Expert Cybersecurity - FirstNet | Linux Enthusiast | Problem Solver
Location
Louisville, Kentucky, United States
Company size

Who is Justin L.? Overview

A concise factual answer block for searchers comparing this professional profile.

Quick answer

Justin L. is listed as Expert Cybersecurity - FirstNet | Linux Enthusiast | Problem Solver at AT&T, a with 218956 employees, based in Louisville, Kentucky, United States. AeroLeads shows a matched LinkedIn profile for Justin L..

Justin L. previously worked as Expert Cybersecurity - FirstNet at At&T and Principal Cybersecurity at At&T. Justin L. holds General Studies from Graham Institute.

Company email context

Email format at AT&T

This section adds company-level context without repeating Justin L.'s masked contact details.

AT&T

Review company-level records connected to Justin L. before choosing the right outreach path.

Profile bio

About Justin L.

I enjoy solving technology and business problems. Throughout my career, I have accumulated many years of experience in cybersecurity, systems engineering, administration, customer and executive facing presenting, and policy and process engineering.

Current workplace

Justin L.'s current company

Company context helps verify the profile and gives searchers a useful next step.

AT&T
At&T
Expert Cybersecurity - FirstNet | Linux Enthusiast | Problem Solver
dallas, texas, united states
Website
Employees
218956
AeroLeads page
4 roles

Justin L. work experience

A career timeline built from the work history available for this profile.

Expert Cybersecurity - Firstnet

Current

Remote

I act as the architectural lead for a team of eight developers who are building a security governance platform for the multi-billion dollar FirstNet program. Additionally, I run the vulnerability management program, for FirstNet, which resulted in reducing the overall vulnerability footprint by 60% in the first year. I also participated in contractual negotiations with 14 vendors to enforce tighter vulnerability remediation timelines. I regularly author and present vulnerability metrics and… Show more I act as the architectural lead for a team of eight developers who are building a security governance platform for the multi-billion dollar FirstNet program. Additionally, I run the vulnerability management program, for FirstNet, which resulted in reducing the overall vulnerability footprint by 60% in the first year. I also participated in contractual negotiations with 14 vendors to enforce tighter vulnerability remediation timelines. I regularly author and present vulnerability metrics and read outs for executive leadership and government agencies supporting the FirstNet program. Other responsibilities include, writing security policy, and partnering with peer security organizations to spread enhanced security outside of FirstNet. Show less

Jan 2022 - Present

Principal Cybersecurity

Louisville, Kentucky, United States

As an Android security SME, I performed pre-release security testing of Android devices. I also built an automated, remotely accessible, Android security testing platform. Leveraging decommissioned hardware, open source software and custom scripting. This reduced testing time by 50% and saved the company over $1,000,000 annually by not purchasing commercial alternatives. Acted as a representative for AT&T as part of the GSMA eSIM working group. Finally, I authored AT&T’s internal security… Show more As an Android security SME, I performed pre-release security testing of Android devices. I also built an automated, remotely accessible, Android security testing platform. Leveraging decommissioned hardware, open source software and custom scripting. This reduced testing time by 50% and saved the company over $1,000,000 annually by not purchasing commercial alternatives. Acted as a representative for AT&T as part of the GSMA eSIM working group. Finally, I authored AT&T’s internal security policy in regards to UICC/SIM technology. Show less

May 2018 - Jan 2022

Principal System Engineer

At&T Digital Life

Remote

In this role, I supported development and lab environments for the Digital Life suite of products which included system administration, application support, and security administration. I also created tools to automate configuration to align systems with security hardening requirements; this annually saved approximately 400 hours of manual labor. Furthermore, I developed a utility to eliminate metadata waste when provisioning customer which saved 20 terabytes of storage a year and reduced… Show more In this role, I supported development and lab environments for the Digital Life suite of products which included system administration, application support, and security administration. I also created tools to automate configuration to align systems with security hardening requirements; this annually saved approximately 400 hours of manual labor. Furthermore, I developed a utility to eliminate metadata waste when provisioning customer which saved 20 terabytes of storage a year and reduced outages related to metadata capacity exhaustion. I increased performance of real time video streaming by 300% by identifying silent firewall degradation. I also performed audits of all alarm strings, reducing our false alarm rate by over 90%. Finally, I backported the entire software stack to RHEL5 in order to enable TLS1.1 support in order to meet new security requirements. Show less

May 2016 - May 2018

Senior: Advanced Technical Support

Remote

In this role, I provided last line of support for the Ericsson Multiservice Proxy (MSP) application. This platform constituted 4000 servers processing traffic for 130,000,000 customers on the AT&T mobility network. I also acted as liaison to the Chief Security Office. This included fixing vulnerabilities on our servers, creating tools to ease the mitigation process, documenting non-compliance and serving on the governance board in order to shape Corporate Unix security policy. Finally, I… Show more In this role, I provided last line of support for the Ericsson Multiservice Proxy (MSP) application. This platform constituted 4000 servers processing traffic for 130,000,000 customers on the AT&T mobility network. I also acted as liaison to the Chief Security Office. This included fixing vulnerabilities on our servers, creating tools to ease the mitigation process, documenting non-compliance and serving on the governance board in order to shape Corporate Unix security policy. Finally, I designed and built a production support lab for our Digital Life platform, leveraging virtualization technology. This $100,000 lab was functionally equivalent to the performance testing environment that cost $5,000,000. Show less

Jul 2009 - May 2016
Team & coworkers

Colleagues at AT&T

Other employees you can reach at att.eu. View company contacts for 218956 employees →

1 education record

Justin L. education

  • Graham Institute
    Graham Institute
    General Studies
FAQ

Frequently asked questions about Justin L.

Quick answers generated from the profile data available on this page.

What company does Justin L. work for?

Justin L. works for AT&T.

What is Justin L.'s role at AT&T?

Justin L. is listed as Expert Cybersecurity - FirstNet | Linux Enthusiast | Problem Solver at AT&T.

Where is Justin L. based?

Justin L. is based in Louisville, Kentucky, United States while working with AT&T.

What companies has Justin L. worked for?

Justin L. has worked for At&T and At&T Digital Life.

Who are Justin L.'s colleagues at AT&T?

Justin L.'s colleagues at AT&T include Noam Erlichman, Jeffrey Scott Callanta, Veterans Project, S Tony Clayborne, and Anthony Dayton.

How can I contact Justin L.?

You can use AeroLeads to view verified contact signals for Justin L. at AT&T, including work email, phone, and LinkedIn data when available.

What schools did Justin L. attend?

Justin L. holds General Studies from Graham Institute.

Find 750M verified contacts

Search by job title, company, industry, location, and seniority. Export verified B2B contact data when you need it.

People with similar names

Check these profiles if this is not the Justin L. you were looking for.

View similar profiles