A

AT&T

Runs US wireless and fiber internet networks

Information Systems Security Engineer

Full-TimeDeadline 1/31/27
$98.1k - $143.2k/yr
Senior
Bachelor's
Columbia, MD, USA
In PersonOn-site five days per week; no relocation is offered.
CybersecuritySecurity Governance, Risk & Compliance
No H1B Sponsorship
US Top Secret Clearance Required

About the job

Requirements
  • Seven years of experience as an Information Systems Security Engineer on Federal Government programs and contracts of similar scope, type, and complexity is required.
  • A bachelor's degree in Computer Science, Information Assurance, Information Security System Engineering, or a related discipline is required; four years of additional Information Systems Security Engineer experience may substitute for the bachelor's degree.
  • DoD 8570 compliance with IASAE Level 2 is required.
  • Knowledge of servers, virtualization, routers, switches, firewalls, VLANs, routing, and network segmentation.
  • Demonstrated experience authoring and maintaining System Security Plans, Security Control Traceability Matrices, and Plans of Action and Milestones.
  • Solid understanding of continuous monitoring, reauthorization, and configuration management processes.
  • Hands-on familiarity with Tenable, Splunk, STIG Viewer, and customer security compliance management tools.
  • Knowledge of Windows, Linux, and network security control implementation.
  • Excellent communication and teamwork skills, and willingness to train junior team members.
  • May be required to respond to after-hours requests in a 24/7 environment.
Responsibilities
  • Perform or review technical security assessments of computing environments to identify vulnerabilities and non-compliance with Information Assurance standards and regulations, and recommend mitigation strategies.
  • Serve as the technical security engineer for assigned systems and System Security Plans, ensuring full lifecycle Risk Management Framework compliance.
  • Provide technical input for Authorization to Operate packages, risk acceptance decisions, and continuous monitoring efforts.
  • Implement and validate security controls from NIST Special Publication 800-53, and serve as a technical security liaison with technology framework teams.
  • Ensure controls are mapped, implemented, and tested in the Security Control Traceability Matrix, and respond to Security Assessment Reports.
  • Collaborate with the vulnerability scanning team to ensure scan compliance, address and retest findings, and accurately reflect them in the system's risk posture.
  • Support continuous monitoring, including vulnerability tracking and control reassessments, and serve as a technical security liaison with technology frameworks.
  • Coordinate with Information Systems Security Officers and system administrators to document and remediate vulnerabilities, control deficiencies, and Plan of Action and Milestones items.
  • Lead or support reauthorization efforts, ensuring system technical artifacts are updated, validated, and submitted on schedule.
  • Evaluate and document security-relevant changes, assessing configuration updates, patches, and system modifications for Risk Management Framework impact.
  • Interface with the Security Architect to ensure designs, configurations, and security mitigations align with approved architectures and customer mandates.
  • Work with Technology Framework teams to complete system documentation.
  • Test and evaluate configurations in a laboratory environment.
  • Provide security operations support as needed.
Desired Qualifications
  • Python

About the company

A

AT&T

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Website

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 Jobs

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

Growth & Insights and Company News

Headcount

6 month growth

-7%

1 year growth

-7%

2 year growth

-7%
Yahoo Finance
Oct 22nd, 2026
AT&T lifts EPS outlook to $2.40 after record 696K home internet net adds in Q3

AT&T raised its full-year adjusted earnings per share outlook to about $2.40, up from $2.25-$2.35, after a third quarter of record subscriber growth. Adjusted EPS was $0.65, up 20% from $0.54 a year earlier. Total revenue rose 5.3% year over year, and service revenue grew 3.8%, its best performance in more than four years. Adjusted EBITDA climbed 5.4%, with a margin of 38.7%. The company added a record 696,000 advanced home internet customers, including 416,000 on fibre. Postpaid phone net adds were 379,000. Net debt to adjusted EBITDA rose to 3.13x from 2.68x, reflecting the $23 billion EchoStar spectrum purchase. AT&T returned $4.8 billion to shareholders in the quarter, and expects free cash flow of more than $18 billion for the year.

Yahoo Finance
Oct 21st, 2026
AT&T CEO downplays SpaceX spectrum threat as Q3 revenue rises 5.3% to $32.3B

AT&T chief executive John Stankey told analysts investors shouldn't "over-rotate" on SpaceX's plan to become a US mobile carrier. SpaceX is buying a block of low-band spectrum to turn Starlink into a carrier. Stankey said AT&T runs six to eight carriers of low-band spectrum in a typical metro area. He noted 40% to 45% of mobile traffic in a city such as Chicago starts indoors, where satellite signals struggle. He called low-Earth-orbit satellites "fantastic" for rural areas. AT&T's third-quarter revenue rose 5.3% to $32.3 billion, with adjusted earnings per share of $0.65. It raised its 2026 adjusted EPS outlook to about $2.40 and expects at least $18 billion in free cash flow. Shares fell over 4% in morning trade.

Yahoo Finance
Oct 21st, 2026
AT&T shares fall 5%, wiping out $8B, despite earnings beat and raised EPS outlook

AT&T shares fell about 5% before the market opened on October 21, erasing roughly $8 billion of value, even after the company beat third-quarter earnings and raised its 2026 adjusted earnings per share (EPS) outlook to about $2.40, from $2.25 to $2.35. Adjusted EPS was $0.65, against a $0.60 consensus estimate. Revenue rose 5.3% to $32.3 billion, and free cash flow reached $5.0 billion. Investors appear to have focused on wireless. AT&T added 379,000 postpaid phone subscribers, in line with forecasts but down from 432,000 in the second quarter, while churn rose to 0.92% from 0.86%. SpaceX's push into US wireless also weighs on the stock. Verizon reports on October 26 and T-Mobile on October 28.

Yahoo Finance
Oct 21st, 2026
AT&T Q3 revenue rises 5.3% to $32.3B as it adds 769K internet customers and lowers capex outlook

AT&T reported third-quarter 2026 revenue of $32.3 billion, up 5.3% year over year, as it added more than 1 million Advanced Connectivity customers for a second consecutive quarter. Internet net adds hit a record 769,000, including 442,000 fiber and 327,000 fixed wireless. Postpaid phone net adds were 379,000. Adjusted EBITDA rose 5.4% to $12.5 billion, and free cash flow was $5.0 billion. Net income from continuing operations fell to $1.3 billion from $9.7 billion a year earlier, which included a gain on the DIRECTV sale. A $2.6 billion non-cash impairment on its Mexico wireless business, which it agreed to sell, also weighed on results. AT&T raised its 2026 adjusted earnings per share outlook to about $2.40 and lowered its long-term capital investment outlook. It remains on track to reach more than 60 million fiber locations by the end of 2030.

Mondo Stadia
Oct 20th, 2026
NBA, WNBA, AT&T Launch fourth generation of the High-Speed ArenaNetwork.

NBA, WNBA, AT&T Launch fourth generation of the High-Speed ArenaNetwork. 20th October 2026 The National Basketball Association (NBA), Women's National Basketball Association (WNBA) and AT&T have announced the launch of the fourth generation of the High-Speed ArenaNetwork (HSAN), the latest evolution of the leagues' connectivity platform built to quickly and reliably transport live game content, highlights, replays, in-arena programming and stats to fansand business partners, while enabling the behind-the-scenes technology that helps support the game operations. Supported by more than 68,000 miles of AT&T's expansive fiber and network infrastructure, the fourth-generation HSAN will be designed to transport more than 118 concurrent, high-quality, low-latency streams per game, supporting millions of hours of basketball consumption during the 2027-28 NBA season. "Today's fans follow the game across live broadcasts, replays, highlights, social media and NBA digital platforms," said Kellyn Smith Kenny, chief marketing & growth officer, AT&T. "Together with the NBA, AT&T is helping build the connectivity foundation that moves game content quickly and reliably across the league, so fans can stay closer to the moments that matter wherever they are watching." "For nearly a decade, AT&T has helped us connect with fans in new and innovative ways, and we're excited to expand our partnership to leverage their next-generation network for HSAN to deepen that connection," said Kerry Tatlock, EVP Global Marketing Partnerships and Media, NBA. "Together, we look forward to building experiences that bring fans closer to the NBA in ways that are personalized and customized for each fan." "AT&T has been an integral partner in the WNBA's growth, helping us reach new fans and elevate the experience for our players, teams, and communities," said WNBA Chief Growth Officer Colie Edison. "As our inaugural WNBA Change maker, we look forward to continuing our work together to drive innovation, visibility, and opportunity for the next generation of players and fans." AT&T, the NBA and the WNBA have also extended their longstanding marketing partnership, continuing AT&T's role as the leagues' Official Connectivity Partner, building on a relationship that began in 2018. The extension also continues AT&T's partnership with the NBA G League, USA Basketball and NBA Take-Two Media. As part of the extended marketing partnership, AT&T and the NBA will create new fan touchpointsacross content and retail activations that debut around American Express NBA Tip-Off. Fans willhave additional opportunities to engage with NBA stars and AT&T athletes, including ShaiGilgeous-Alexander, through unique experiences, special access moments and original contentover the course of the NBA season. AT&T will also continue to connect fans with their favorite teams and players through its partnerships with the Chicago Bulls, Dallas Mavericks, Miami HEAT and LA Clippers. As a WNBA Changemaker, AT&T will maintain its prominent presence across the league, includingthrough its branding on all WNBA team jerseys and continued entitlement partnership of WNBA All-Star. AT&T will also continue its partnerships with WNBA stars A'ja Wilson and Sabrina Ionescu, building on its commitment to connect fans with the players and moments shaping the game. "I've always appreciated how basketball brings together different communities, cultures and creativity," said Shai Gilgeous-Alexander, NBA Champion, two-time NBA MVP and Oklahoma City Thunder guard. "Through my relationship with AT&T and experiences like Shai T&T, we're creating new ways for fans to connect with the game while celebrating the stories and culture that make basketball so special. I'm excited to keep building on that this season." "The WNBA's growth has been incredible to be a part of, and it takes partners who are committed to investing in the game and its future," said A'ja Wilson, Las Vegas Aces center and five-time WNBA MVP. "AT&T has consistently shown up for our league, our players and our fans, helping create experiences that bring people closer to the game. I'm excited to see AT&T continueits partnership with the WNBA and keep building even more opportunities to connect withbasketball fans everywhere." Other highlights of the partnership include AT&T's continued title sponsorship of AT&T SlamDunk at NBA All-Star, which began in 2019. The partnership also builds on the introduction of on-court apron branding during nationally televised NBA regular-season games in the 2025-26season and continues to enhance fan connectivity through Turbo Live by AT&T*. Available at select NBA arenas, Turbo Live enables fans, regardless of carrier, to access prioritized connectivity on the AT&T network, making it easier to share, engage and stay connected throughout the game.