Principal Cybersecurity - Endpoint Security

This position requires office presence of a minimum of 5 days per week and is only located in the location(s) posted. No relocation is offered. Join AT&T and reimagine the communications and technologies that connect the world. Our Chief Security Office ensures that our assets are safeguarded through truthful transparency, enforce accountability and master cybersecurity to stay ahead of threats. Bring your bold ideas and fearless risk-taking to redefine connectivity and transform how the world shares stories and experiences that matter. When you step into a career with AT&T, you won’t just imagine the future-you’ll create it. Overview: We are looking for a highly skilled Endpoint Security Engineer to join our Cybersecurity team. This role is direct and deeply technical, focusing initially on Tanium deployment, configuration, and operations in a large global enterprise environment. The candidate will own endpoint agent deployments across tens of thousands of endpoints, driving security visibility and control. If you thrive in complex environment, enjoy optimizing toolsets, and have proven experience in enterprise endpoint protection, this role is for you. Key Roles & Responsibilities: Lead the deployment, configuration, and tuning of Tanium modules, including Asset, Comply, Deploy, Threat Response, and Reveal, ensuring high availability and performance across a large global fleet. Build and maintain integrations between Tanium and other enterprise security tools to improve automation, inventory, vulnerability identification, and threat response. Deploy and manage endpoint security agents for tools such as Endpoint Detection and Response (EDR), Remote Access VPN, and Data Loss Prevention (DLP). Partner with SOC and threat intelligence teams to implement detection and response logic leveraging Tanium sensors and queries. Automate endpoint provisioning, patching, and configuration compliance using Tanium scripting and APIs, as well as PowerShell and Python for custom workflows. Conduct root cause analysis for endpoint performance telemetry issues and drive remediations through coordinated change management processes. Maintain detailed runbooks, operational playbooks, and endpoint security baselines for global deployment consistency. Function as the subject matter expert for Tanium and other endpoint security tools during security incidents, audits, and compliance initiatives. Required Qualifications: A Bachelor’s degree in Information Systems, Engineering, or Cybersecurity. 5+ years in endpoint security or endpoint systems engineering within large enterprise environments. Proven direct experience with Tanium in enterprise deployment, custom sensor creation, patch management, and compliance reporting. Strong background with endpoint security agent technologies such as EDR, DLP, VPN. Experience managing endpoint agents at scale using SCCM, Intune, JAMF, and other automation technologies. Deep understanding of Windows, MacOS, and Linux endpoint configurations, security controls, and hardening techniques. Solid scripting skills in PowerShell, Python, or Bash for endpoint automation. Ability to work with distributed, cross-functional teams on security tool deployment and integration projects. Excellent communication skills including metrics/performance documentation/presentation, technical drawing/architecture origination, and modification. Ability to operate well under pressure and urgent circumstances. Self-reliant and diligent in follow-through for assigned tasks. Familiarity with applying Artificial Intelligence (AI) or Machine Learning (ML) techniques in cybersecurity contexts (e.g., anomaly detection, threat hunting, behavioral analytics, or risk scoring). Preferred Qualifications: Tanium Certified Operator or Administrator Experience managing endpoints with more than 50,000 devices Security certifications such as CISSP, GIAC, or equivalent Education/Experience: Bachelor’s degree (BS/BA) desired in Computer Science or Cybersecurity. 7+ years of related experience. Certification is required in some areas. Supervisor: No Our Principal Cybersecurity earns between $155,000-$233,200 USD Annual, not to mention all the other amazing rewards that working at AT&T offers. Individual starting salary within this range may depend on geography, experience, expertise, and education/training. Joining our team comes with amazing perks and benefits: Medical/Dental/Vision coverage 401(k) plan Tuition reimbursement program Paid Time Off and Holidays (based on date of hire, 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 but is unprotected 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 phone. #LI-Onsite – Full-time office role- Ready to join our team? Apply today. Weekly Hours: 40 Time Type: Regular Location: Charlotte, North Carolina Salary Range: $155,400.00 - $233,200.00 It is the policy of AT&T to provide equal employment opportunity (EEO) to all persons regardless of age, color, national origin, citizenship status, physical or mental disability, race, religion, creed, gender, sex, sexual orientation, gender identity and/or expression, genetic information, marital status, status with regard to public assistance, veteran status, or any other characteristic protected by federal, state or local law. In addition, AT&T will provide reasonable accommodations for qualified individuals with disabilities. AT&T is a fair chance employer and does not initiate a background check until an offer is made. We are pioneers of making connections and have been ever since Alexander Graham Bell invented the telephone and founded our company. That was nearly 150 years ago, and we haven’t stopped innovating since. At our core, we help bring families, communities, and businesses together with the products and services they need to thrive every day. From the widespread and growing availability of 5G and Fiber to working on things we once only dreamed of—at AT&T, we create connections that change the world. Apply tot his job Apply To this Job