Information Systems Security Engineer, Level 3

AT&T

. Provide expert guidance and evaluate work products for security engineers supporting secure networking, computing, and enclave environments .

Posted 10/5/2026full-timeColumbia • Maryland • United StatesSeniorLead💰 $118,700 - $243,300 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive expertise in Information Assurance and Security Engineering, with a strong focus on secure system architecture, vulnerability management, and compliance with DoD standards. Proven ability to lead teams, interact with stakeholders, and implement security solutions that protect high-value assets.

Highest-signal resume keywords

ISSE ExperienceDoD 8570 ComplianceTS/SCI ClearanceKnowledge of 800-53 ControlsVulnerability Testing Tools

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Information AssuranceSecurity ArchitectureVulnerability ManagementIncident ResponseNetwork Security TechnologiesMalware IdentificationAccess Control SystemsMicrosoft WindowsLinux Operating SystemsSecurity Event Dashboards

Soft Skills

Excellent Communication SkillsLeadership SkillsTeamwork Skills

Tools & Technologies

SIEM TechnologiesSplunkVirtualization TechnologiesFirewallsIDS/IPS

Certifications & Qualifications

DoD 8570 IASAE Level 2

Industry Keywords

Information SecuritySecure NetworkingCompliance TestingSecurity Policy DevelopmentIntellectual Property Development

Tech Stack

Tools & technologies

FirewallsLinuxSplunkTypeScript

About the role

Key responsibilities & impact

Provide expert guidance and evaluate work products for security engineers supporting secure networking, computing, and enclave environments
Recommend system-level solutions for secure system development and maintenance
Monitor and suggest improvements to information assurance policy
Interact with customers, IT staff, and high-level corporate officers to define and achieve IA objectives
Ensure information-system architecture and design are functional and secure
Prevent, detect, and resolve risks to high-value assets
Architect, design, implement, support, and evaluate security-focused tools and services
Provide software vulnerability remediation advice to developers and development teams
Implement vulnerability testing tools for continuous monitoring and patch verification
Test and evaluate products in a lab environment
Review certification and accreditation documentation for completeness and compliance
Provide security policy and procedure development input
Evaluate and recommend emerging security products and technologies
Participate in projects developing new intellectual property
Promote security and customer trust within the organization

Requirements

What you’ll need

Twenty (20) years of experience as an ISSE on programs and contracts of similar scope, type, and complexity
Bachelor’s degree in Computer Science, Information Assurance, Information Security System Engineering, or related discipline from an accredited college or university is required
A Master’s degree ... may be substituted for two (2) years of experience, reducing the requirement to eighteen (18) years of experience
Four (4) years of additional ISSE experience may be substituted for a Bachelor’s degree
DoD 8570 compliance with IASAE Level 2 is required
TS/SCI with polygraph clearance required
Knowledge of 800-53 controls, testing information systems for compliance, and creation of test cases
Knowledge of incident response and creation, execution, and reporting of activities
Knowledge of firewalls, IDS/IPS, intrusion detection, VLANs, routing, and network security technologies
Knowledge of virtualization technologies, including virtual firewalls, networking, and segmentation
Knowledge of SIEM technologies such as Splunk and creation of security event dashboards
Knowledge of malware identification, containment, and eradication
Knowledge of access control systems, PKI, multi-factor authentication, and entitlements management
Proficiency in Microsoft Windows and Linux operating systems
Excellent written and verbal communication skills
Excellent leadership and teamwork skills
No relocation is offered

Benefits

Comp & perks

Medical/Dental/Vision coverage
401(k) plan
Tuition reimbursement program
Paid Time Off and Holidays (at least 23 days of vacation each year and 9 company-designated holidays)
Paid Parental Leave
Paid Caregiver Leave
Additional sick leave beyond what state and local law require may be available
Adoption Reimbursement
Disability Benefits (short term and long term)
Life and Accidental Death Insurance
Supplemental benefit programs: critical illness/accident hospital indemnity/group legal
Employee Assistance Programs (EAP)
Extensive employee wellness programs
Employee discounts up to 50% off on eligible AT&T mobility plans and accessories, AT&T internet (and fiber where available) and AT&T wireline phone