Information Systems Security Engineer Level 3
$118.7k - $243.3k/yr
Expert
Bachelor's, Master's
Columbia, MD, USA
In PersonOnsite at the designated work location five days per week; no relocation is offered.
CybersecuritySecurity Engineering & Architecture, Security Governance, Risk & Compliance
No H1B Sponsorship
US Top Secret Clearance Required
About the job
Requirements
- Twenty years of experience as an Information Systems Security Engineer on programs and contracts of similar scope, type, and complexity are required.
- A bachelor's degree in Computer Science, Information Assurance, or Information Security System Engineering, or a related discipline, from an accredited college or university is required.
- A master's degree in Computer Science, Information Assurance, Information Security System Engineering, or a related discipline may substitute for two years of experience, reducing the experience requirement to eighteen years.
- Four years of additional Information Systems Security Engineer experience may substitute for a bachelor's degree.
- DoD 8570 compliance with Information Assurance Systems Architecture and Engineering Level 2 is required.
- A Top Secret/Sensitive Compartmented Information clearance with polygraph is required.
- Knowledge of 800-53 controls, information system compliance testing, and test-case creation.
- Knowledge of incident response and creating, executing, and reporting incident-response activities.
- Knowledge of firewalls, intrusion detection and prevention systems, VLANs, routing, and other network security technologies.
- Knowledge of virtualization technologies, including virtual firewalls, networking, and segmentation.
- Knowledge of Security Information and Event Management technologies such as Splunk and creating security-event dashboards.
- Knowledge of malware identification, containment, and eradication.
- Knowledge of access control systems, Public Key Infrastructure, 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.
Responsibilities
- Provide expert guidance and evaluate work products for one or more security engineers supporting engineering teams in the design, development, implementation, evaluation, and integration of secure networking, computing, and enclave environments.
- Advocate for and recommend system-level solutions for the secure development and maintenance of systems.
- Monitor and suggest improvements to Information Assurance policy, and interact with customers, IT staff, and high-level corporate officers to define and achieve required Information Assurance objectives.
- Ensure information-system architecture and design are functional and secure, including program-of-record systems, new and proposed systems, and special-purpose environments with platform IT interconnectivity.
- Prevent, detect early, and resolve risks to high-value assets.
- Architect, design, implement, support, and evaluate security-focused tools and services.
- Provide software vulnerability remediation advice to software developers and software development teams.
- Implement security vulnerability testing tools for continuous monitoring and patch verification.
- Test and evaluate products in a lab environment.
- Review certification and accreditation documentation and provide feedback on its completeness and compliance.
- Provide input into the development of security policies and procedures.
- Evaluate and recommend new and emerging security products and technologies.
- Participate in projects that develop new intellectual property.
- Promote security within the organization and advocate for customer trust.
About the company
AT&T sells mobile phone plans and home internet to households and businesses across the US, and runs a wireless business in Mexico. Its business rests on two networks: a nationwide 5G wireless network and a fiber internet network that is replacing its old copper phone lines. Companies and government agencies also buy private networks, security and connectivity services from its business unit. Most revenue comes from monthly service plans plus device installment payments, and the company pushes customers to combine phone and home internet. AT&T Inc. began in 1983 as Southwestern Bell, took the AT&T name after buying its former parent in 2005, and is based in Dallas, Texas.
Company Size
10,001+
Company Stage
IPO
Headquarters
Dallas, Texas
Founded
1983
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Simplify's Take
What believers are saying
- Fiber is AT&T's main growth bet: it targets over 40 million fiber locations by December 2026.
- Fiber growth includes acquisitions: AT&T's February 2026 purchase of Lumen's consumer fiber unit added over 1 million customers.
- AT&T is investing in offices: a $1.35 billion Plano campus, announced January 2026, will house nearly 6,000 staff.
What critics are saying
- Debt stays high for years: AT&T expects about three years after its EchoStar purchase to restore its 2.5x debt target.
- The workforce is shrinking: AT&T's headcount fell from about 141,000 to 133,000 in the year to December 2025.
- FirstNet depends on Washington: a federal authority oversees AT&T's first-responder contract and needs renewal from Congress.
What makes AT&T unique
- AT&T runs the national first-responder network: its FirstNet federal contract lasts until 2042.
- AT&T bought more airwaves in July 2026: its $23 billion EchoStar deal added spectrum across about 400 markets.
- AT&T sells phone and home internet together: 42.5% of its advanced internet homes also used AT&T wireless.
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Benefits
- Health Insurance
- Dental Insurance
- Vision Insurance
- 401(k) Retirement Plan
- 401(k) Company Match
- Paid Vacation
- Paid Sick Leave
- Paid Holidays
- Paid Parental Leave
- Adoption Assistance
- Disability Insurance
- Life Insurance