Principal Engineer, Cybersecurity

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!Job OverviewThis role is critical for protecting digital assets by ensuring robust cybersecurity across software, systems, and infrastructure. It involves conducting device security assessments, code reviews, and vulnerability testing to identify and mitigate risks. The role collaborates with engineering teams and OEMs to implement security measures for mobile and IoT devices including CPEs, hotspots, trackers, routers and modems . Success is measured by the effectiveness of security controls and the reduction of vulnerabilities. The work enhances organizational resilience against cyber threats and safeguards critical business operations and customer data.Job Responsibilities:Lead end-to-end device security assessments and penetration testing across IoT, CPEs, hotspots, trackers, routers, and modems to identify and mitigate risksDevelops proactive device security measures, solutions, and strategies to enhance the security posture across various technologiesCollaborates with device engineering teams and OEMs to integrate security practices into hardware and software development including deployment processesConducts digital forensics on compromised or suspect devices to determine root cause, scope, attacker methodology and partners with threat response teamsDrives strategic security initiatives to protect against cyber threats and ensure compliance with security standardsDefine and evolve T-Mobile's device security assessment methodology, requirements, standards, and tooling roadmapMentor and upskill junior and mid-level security engineers on device security techniques and best practicesAlso responsible for other duties/projects as assigned by business management as neededEducation and Work Experience:Bachelor's Degree plus 7 years of related work experience OR Advanced degree with 5 years of related experience (Required) Acceptable areas of study include Computer Science or Information Technology. (Required)3-5 years of demonstrated hands-on experience conducting device security assessments and testing on IoT devices, routers, modems, or similar embedded platforms (Required)3-5 years of proficiency in using security tools (Ghidra, IDA Pro, dotPeek, Burpsuite, Nmap, hashcat, OllyDbg, etc.) (Required)3-5 years of hands-on knowledge of 4G LTE and 5G architecture (RAN and Core) including cloud environments, and containerized applications3-5 years of proficient experience in Python, C++, C#, PHP, and shell scripting, with experience building scalable systems and automating workflows and familiarity with AI tools (ChatGPT, Claude) (Preferred)7-10 years Conducting security assessments and vulnerability testing to identify and mitigate risks in digital environments (Preferred)7-10 years Developing and implementing cybersecurity measures across various technologies including mobile and IoT devices, cloud services, and network technologies (Preferred)7-10 years Leading and collaborating with engineering teams to enhance security postures and strategic cybersecurity initiatives (Preferred)Knowledge, Skills and Abilities:Artificial Intelligence (AI) (Required)Leadership: Strong leadership skills to guide and mentor teams in achieving robust cybersecurity defenses (Required)Collaboration: Strong capability to work collaboratively with cross-functional teams to implement security measures. (Required)Problem Solving: Proficiency in troubleshooting and resolving complex security issueseffectively. (Required)Strategic Thinking: Ability to develop and implement long-term security strategies that align with business objectives. (Required)Cybersecurity (Required)Escalation Management (Required)Security Automation (Required)Security Engineering (Required)Security Incident Management (Required)Stakeholder Management (Required)Threat Modeling (Required)Licenses and Certifications:Certified Information Systems Security Professional (CISSP) An advanced-level certification for IT pros serious about careers in information security. Offered by (ISC)², CISSP is designed to prove expertise in designing, implementing, and managing a best-in-class cybersecurity program. (Preferred) Certified Information Security Manager (CISM) Offered by ISACA, this certification is for management-focused IT professionals who are tasked with managing, designing, overseeing, and assessing an enterprise’s information security. (Preferred) Certified in Risk & Informational Systems Control (CRISC) Also by ISACA, CRISC is designed for IT professionals, project managers, and others whose job it is to identify and manage risks to IT and the business. (Preferred) At least 18 years of ageLegally authorized to work in the United StatesTravel:Travel Required (Yes/No): NoDOT Regulated:DOT Regulated Position (Yes/No): NoSafety Sensitive Position (Yes/No): NoCompensation Range: Bellevue, WA: $166,300 to $224,900Frisco, TX: $147,700 to $199,900Overland Park, KS: $139,200 to $188,400Total Target Cash Earnings Opportunity: $153,360 - $276,840National Base Pay Range: $127,800 - $230,700The Total Target Cash Earnings Opportunity represents the expected total cash compensation for this role at target performance, combining base salary and annual incentive opportunity. Actual earnings may be higher or lower depending on individual performance and overall company results. The base pay range reflects the compensation component of this opportunity. The candidate’s actual pay will be based on various factors, such as work location, qualifications, and experience, so the actual starting pay will vary within this range. To find the pay range for this role based on hiring location, T-Mobile, employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, based on their role. Corporate employees are eligible for a year-end bonus based on individual and/or company performance and which is set at a percentage of the employee’s eligible earnings in the prior year. Certain positions in Customer Care are eligible for monthly bonuses based on individual and/or team performance. The incentive component included in the Total Target Cash Earnings Opportunity reflects target performance. Actual earnings included in the Total Target Cash Earnings Opportunity reflect target performance; actual payouts may vary. At T-Mobile, our benefits exemplify the spirit of One Team, Together! A big part of how we care for one another is working to ensure our benefits evolve to meet the needs of our team members. Full and part-time employees have access to the same benefits when eligible. We cover all of the bases, offering medical, dental and vision insurance, a flexible spending account, 401(k), employee stock grants, employee stock purchase plan, paid time off and up to 12 paid holidays - which total about 4 weeks for new full-time employees and about 2.5 weeks for new part-time employees annually - paid parental and family leave, family building benefits, back-up care, enhanced family support, childcare subsidy, tuition assistance, college coaching, short- and long-term disability, voluntary AD&D coverage, voluntary accident coverage, voluntary life insurance, voluntary disability insurance, and voluntary long-term care insurance. We don't stop there - eligible employees can also receive mobile service & home internet discounts, pet insurance, and access to commuter and transit programs! To learn about T-Mobile’s amazing benefits, check out .Never stop growing!As part of the T-Mobile team, you know the Un-carrier doesn’t have a corporate ladder–it’s more like a jungle gym of possibilities! We love helping our employees grow in their careers, because it’s that shared drive to aim high that drives our business and our culture forward. By applying for this career opportunity, you’re living our values while investing in your career growth–and we applaud it. You’re unstoppable!T-Mobile USA, Inc. is an Equal Opportunity Employer. All decisions concerning the employment relationship will be made without regard to age, race, ethnicity, color, religion, creed, sex, sexual orientation, gender identity or expression, genetic information, national origin, religious affiliation, marital status, citizenship status, veteran status, the presence of any physical or mental disability, or any other status or characteristic protected by federal, state, or local law. Discrimination, retaliation or harassment based upon any of these factors is wholly inconsistent with how we do business and will not be tolerated.Talent comes in all forms at the Un-carrier. If you are an individual with a disability and need reasonable accommodation at any point in the application or interview process, please let us know by emailing View email address on click.appcast.io or calling View phone number on click.appcast.io. Please note, this contact channel is not a means to apply for or inquire about a position and we are unable to respond to non-accommodation related requests.SummaryLocation: Bellevue, WashingtonType: Full timePosted: 2026-10-16Country: United States of AmericaRequisition: REQ373832Posting ID: de11b02fd7851047242647000aaf0000