Principal Cybersecurity Engineer, Telco

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Job Overview
This role involves securing critical telecommunications technologies, including 3GPP standards, IMS, packet core, messaging, e911, and 5G networks, while leveraging modern practices like zero-trust architecture, containerization, and advanced threat detection. The engineer collaborates with cross-functional teams to assess and mitigate risks, ensuring a secure environment for enterprise applications, IoT, mobile devices, and next-generation networks. The role works with engineering teams to implement security measures for technologies including mobile devices, cloud services, and networks. 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:

• Conducts security assessments, code reviews, and vulnerability testing to identify and mitigate risks
• Develops proactive security measures and strategies to enhance the security posture across various technologies
• Collaborates with engineering teams to integrate security practices into software development and deployment processes
• Serves as a subject matter expert in cybersecurity, providing guidance and leadership to various business units
• Ensures the security of 3GPP-compliant systems, including LTE, 5G, and IMS core networks
• Evaluates new technologies and processes for potential security vulnerabilities and recommends corrective actions.
• Develops and implements cybersecurity solutions for packet core infrastructure, including EPC, UPF, and related network elements.
• Drives strategic security initiatives to protect against cyber threats and ensure compliance with security standards.
• Leads security design and implementation for critical services like e911, VoLTE, RCS messaging, and SMS/MMS platforms.
• Secures signaling protocols (e.g., Diameter, SIP, HTTP/2) and mitigate risks such as signaling fraud, DoS attacks, and SS7 vulnerabilities.
• Also responsible for other duties/projects as assigned by business management as needed

Education 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)
• 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, e911, VoLTE, IMS Core and RAN. (Preferred)
• 7-10 years Leading and collaborating with engineering teams to enhance security postures and strategic cybersecurity initiatives (Preferred)

Knowledge, Skills and Abilities:

• Proven expertise in 3GPP standards, 5G architecture, IMS core, and packet core security. ​
• Artificial Intelligence (AI) (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 & Informaitonal 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 age
• Legally authorized to work in the United States

Travel:
Travel Required (Yes/No): No
DOT Regulated:
DOT Regulated Position (Yes/No): No
Safety Sensitive Position (Yes/No): No

Compensation Range:

Bellevue, WA: $166,300 to $224,900

Frisco, TX: $147,700 to $199,900

Overland Park, KS: $139,200 to $188,400

Base Pay Range: $127,800 - $230,700

Corporate Bonus Target: 20%

The pay range above is the general base pay range for a successful candidate in the role. The successful 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.

At T-Mobile, employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, based on their role. Most Corporate employees are eligible for a year-end bonus based on company and/or individual 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. To find the pay range for this role based on hiring location, https://paylookup.t-mobile.com/paylookup?reqID=REQ358974¶dox=1

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 www.t-mobilebenefits.com.

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, 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.
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