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Lee JohnsonLJ
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Lee Johnson

@leejohnson1

Principal Cyber Security Engineer at ManTech securing 70,000+ endpoints with Cisco ISE and vulnerability management.

United States
Message

At ManTech, I architect, deploy, configure, and support Cisco Identity Services Engine and Comply-to-Connect capabilities across Unclassified, Secret, and Top Secret environments. I support security operations across 70,000+ endpoints, using Tenable Security Center to identify deficiencies and validate remediation.

I also validate security controls against NIST SP 800-53 and maintain remediation tracking and authorization documentation. Earlier, I assessed network architectures across 300+ sites at New Gen Technologies and supported secure enterprise network and infrastructure work at Leidos and General Dynamics Information Technology.

Experience

Work history, roles, and key accomplishments

ManTech logoMA
Current

Principal Cyber Security Engineer

Jun 2025 - Present (1 year 4 months)

Architect, deploy, configure, and support enterprise Cisco ISE and Comply-to-Connect security capabilities across multiple classification levels. Assess cybersecurity posture and vulnerability data using Tenable Security Center, support continuous monitoring, and validate security controls against NIST SP 800-53.

JL

IT Consultant

Johnson Data Solutions, LLC

May 2015 - May 2020 (5 years)

Provided independent IT and cybersecurity consulting to commercial clients across retail and distributed-enterprise environments. Implemented and supported secure network infrastructure incorporating Cisco Meraki and Fortinet technologies.

Telos logoTE

Network Engineer/Site Lead

Telos

Dec 2017 - Jul 2018 (7 months)

Served as Network Engineer and Site Lead, overseeing network operations and site activities.

UT

Business Process Analyst

Unified Business Technologies

Jun 2017 - Sep 2017 (3 months)

Analyzed business processes to identify improvements and support organizational efficiency.

PS

System Administrator

Personnel Recovery Management System

Jul 2016 - Dec 2016 (5 months)

Administered systems and provided technical support for the Personnel Recovery Management System.

Michigan State University logoMU

System Administrator

Jun 2014 - Jul 2015 (1 year 1 month)

Administered systems and provided technical support for university operations.

7-Eleven logoEL

NEC POS Technician

Apr 2013 - Jun 2014 (1 year 2 months)

Provided technical support for NEC point-of-sale systems.

Sears Holdings logoSH

Help Desk Analyst

Jan 2014 - Apr 2014 (3 months)

Provided help desk support for employees and customers.

JP Morgan Chase logoJC

Network Technician

Aug 2013 - Dec 2013 (4 months)

Provided network technical support and maintenance.

Hewlett-Packard logoHE

Technical Support Representative

Feb 2013 - Aug 2013 (6 months)

Provided technical support to customers for HP products.

CompuCom logoCO

Network Administrator III

CompuCom

Jan 2013 - Feb 2013 (1 month)

Administered network systems and provided technical support.

SS

StaRComm Lead Technician

Stallion Oilfield Services

Apr 2012 - Dec 2012 (8 months)

Led technical operations for StaRComm communications systems.

Education

Degrees, certifications, and relevant coursework

CompTIA, Inc. logoCI

CompTIA, Inc.

CertMaster Learn Network+, Network+

Completed CompTIA CertMaster Learn Network+ training.

Michigan State University logoMU

Michigan State University

Bachelor of Science, Media and Information

Bachelor of Science in Media and Information with a concentration in Media Management from Michigan State University.

Western Governors University logoWU

Western Governors University

Master of Science, Information Technology Management

Master of Science in Information Technology Management from Western Governors University.

CompTIA, Inc. logoCI

CompTIA, Inc.

CertMaster Learn Cloud+, Cloud+

Completed CompTIA CertMaster Learn Cloud+ training.

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