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Principal Engineer, Cyber Threat Intelligence

T-Mobile USA, Inc.
Washington, United Statesfull_timeVerifiedPosted 18 Feb 2026
💰 $230,700/yr($127,800/yr$230,700/yr)

About the role

At T-Mobile, we invest in YOU!  Our Total Rewards Package ensures that employees get the same big love we give our customers.  All team members receive a competitive base salary and compensation package - this is Total Rewards. Employees enjoy multiple wealth-building opportunities through our annual stock grant, employee stock purchase plan, 401(k), and access to free, year-round money coaches. That’s how we’re UNSTOPPABLE for our employees!

As a Principal Cybersecurity Engineer, you will be at the forefront of driving security initiatives within our Cyber Threat Intelligence (CTI) team! Using your extensive expertise in cybersecurity, you will lead the charge in conducting comprehensive technical security assessments, engaging with threat actors, performing forensic examinations, and implementing rigorous vulnerability testing.

In this pivotal role, you will serve as a trusted domain expert, guiding our vision and driving tangible results to fortify our security posture across various domains, including mobile devices, IoT devices, enterprise applications, cloud infrastructure, big data environments, core and carrier network technologies, and other critical business units as necessary.

As the principal security advisor, you will collaborate closely with multi-functional teams to ensure the successful delivery of projects and services to our enterprise customers, providing invaluable insights and guidance to uphold the highest standards of security. Join us in shaping the future of cybersecurity and safeguarding our digital assets against emerging threats.

Job Responsibilities

  • The Principal Cybersecurity Engineer excels in optimizing multi-functional partnerships to meet customer requirements effectively, demonstrating leadership in organizing large-scale analysis efforts across departments. Using internal and external data resources, they make strategic business decisions and collaborate closely with key partners, fostering long-term relationships.

  • In leading information security reviews, this role works closely with Engineering & Operations Teams to address security vulnerabilities identified through PSIRTs, scans, or breaches. They proactively find opportunities for process or technology improvements within existing legacy applications or infrastructure, driving remediation efforts.

  • Investigating security needs and recommending resolutions, the Principal Cybersecurity Engineer implements, tests, and monitors security improvements, ensuring robust defenses. They maintain visibility at the Executive level, working with various groups such as application support, engineering ops, finance, and risk management.

  • Drawing upon significant experience in analyzing underlying technologies for threat identification and analysis, they proactively identify development areas and stay abreast of current trends to address major security issues. Playing a leadership role in implementing action plans, they lead security projects driven by both internal and external stakeholders.

  • Additionally, they mentor peers and junior team members, imparting expertise in security technologies, enterprise solution design, and effective customer interaction. With a deep understanding of various threat modeling approaches, they are an authority in network & information security, including Firewall policy design, SSL Certificate management, and vulnerability analysis & mitigation, ensuring an advanced understanding of IP/Security solutions applicable to the Wireless Network Architecture.

Education

  • Bachelor's Degree Computer Science or Information Technology.

    Relevant experience in lieu of degree may be considered.

Work Experience

  • 7-10 years conducting security assessments and vulnerability testing to identify and mitigate risks in digital environments

  • 7-10 years developing and implementing cybersecurity measures across various technologies including mobile and IoT devices, cloud services, and network technologies

  • 7-10 years Leading and collaborating with engineering teams to enhance security postures and strategic cybersecurity initiatives

  • Be authority in multiple security subject areas

  • Experience with high level design architecture, security technologies, networking, web services and SOA.

  • Domain expert in all facets of network & information security, including Firewall policy design, SSL Certificate management, vulnerability analysis & mitigation, and other topics as assigned.

Highly Preferred Skills

  • Proficient in conducting digital foren

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Company

T-Mobile USA, Inc.

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