Principal Engineer, Threat Hunting

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 OverviewThe Principal Engineer, Threat Hunter is critical to protecting T-Mobile’s digital assets, serving on the Continuous Hunting and Offensive Specialists (CHAOS) team, T-Mobile’s elite offensive and defensive cybersecurity function. You will lead continuous, hypothesis- and intelligence-driven threat hunting, adversary emulation, and rapid-response vulnerability assessments across software, systems, and infrastructure to proactively identify, validate, and drive remediation of risks before adversaries can exploit them. You will collaborate with engineering teams to implement security measures across mobile devices, cloud services, and networks, including security assessments, code reviews, and vulnerability testing. Success is measured by the effectiveness of security controls, the strength of detection and response capabilities, and the reduction of vulnerabilities. Your work enhances organizational resilience against evolving threat actors and safeguards critical business operations and customer data.Job Responsibilities:Conducts security assessments, code reviews, and vulnerability testing to identify and mitigate risksDevelops proactive security measures and strategies to enhance the security posture across various technologiesCollaborates with engineering teams to integrate security practices into software development and deployment processesServes as a subject matter expert in cybersecurity, providing guidance and leadership to various business unitsDrives strategic security initiatives to protect against cyber threats and ensure compliance with security standardsEvaluates new technologies and processes for potential security vulnerabilities and recommends corrective actionsAlso responsible for other duties/projects as assigned by business management as neededRequired Qualifications:Bachelor's Degreeplus 7 years of related work experience OR Advanced degree with 5 years of related experienceAcceptable areas of study include Computer Science or Information Technology.Preferred Qualifications: 7-10 years Conducting security assessments and vulnerability testing to identify and mitigate risks in digital environments7-10 years Developing and implementing cybersecurity measures across various technologies including mobile and IoT devices, cloud services, and network technologies7-10 years Leading and collaborating with engineering teams to enhance security postures and strategic cybersecurity initiativesRequired Knowledge, Skills, and Abilities:Artificial Intelligence (AI)CybersecurityEscalation ManagementThreat ModelingSecurity AnalysisSecurity AutomationSecurity ConsultingSecurity EngineeringSecurity Incident ManagementSecurity TechnologiesStakeholder Management (Preferred)Information Security (Preferred)Information Systems (Preferred)License/Certification (Preferred):CISSP and/or CCSK and/or CCSP and/or CISA/CISM certification a plusWe pride ourselves on encouraging a culture of innovation, advocating for agile methodologies, and promoting transparency in all that we do. Join us in embodying the spirit of the 'Un-carrier' and make a tangible impact! Our team is dynamic where no day is the same, and we are diverse and inclusive passionate about growth and transformation. If you're up to the challenge, apply today!• At least 18 years of age• Legally authorized to work in the United StatesTravel:Travel Required (Yes/No):YesDOT Regulated:DOT Regulated Position (Yes/No):NoSafety Sensitive Position (Yes/No):NoTotal 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, Washington; Overland Park, Kansas; Frisco, TexasType: Full timePosted: 2026-11-06Country: United States of AmericaRequisition: REQ370475Posting ID: ff436f1099d7103e402633e72b220000