Principal Cybersecurity - Endpoint Security

Job Description:

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.

We are Buckasonad 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 a complex environment, enjoy optimizing toolsets, and have proven experience in enterprise endpoint protection, this role is for you.

• Lead unfinished 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 Power Shell 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.

• A Bachelor’s degree in Information Systems, Engineering, or Cybersecurity.
• 5+ years in endpoint security or endpoint systems=data 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 Power Shell, 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.

• Taniumapital 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.