Principal Systems Reliability Engineer, Secure Federal Operations

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!This role is responsible for designing and implementing secure, scalable, and highly reliable technology solutions across cloud platforms, networking, and cybersecurity domains. This role combines advanced expertise in system architecture, cloud engineering (Azure, AWS), and DevSecOps practices to ensure optimal performance, availability, and security of enterprise systems. Key responsibilities include managing identity and access controls, certificate lifecycle, patch management using SCCM, and automation through scripting. Additionally, the role oversees Microsoft 365 (M365) services to ensure seamless collaboration, compliance, and security across productivity platforms. Success is measured by improved security posture, operational efficiency, and enhanced service reliability, directly impacting organizational performance and customer experience.This is a hybrid position required to be in-office at least 2 days a week.T-Mobile requires U.S. citizenship for certain roles within the organization. This role requires U.S. citizenship. Individuals hired into this role will be required to submit documentation proving U.S. citizenship within the first 7 days of hire - failure to do so will result in termination.MAIN RESPONSIBILITIES:System Architecture & ReliabilityDevelop and implement system designs to improve software delivery speed and operational efficiency.Lead architecture for cross-domain programs ensuring alignment with enterprise standards.Deliver solutions that enhance service availability, scalability, latency, and efficiency.Cloud & Platform EngineeringDesign and deploy solutions on Azure and AWS.Build and operate cloud-native platforms (Kubernetes, service mesh, ingress, policy engines).Implement Infrastructure as Code (IaC) for automated deployments.Identity & Access ManagementAdminister Active Directory and integrate with cloud identity solutions.Configure 802.1X authentication for secure network access.Manage digital certificates lifecycle (issuance, renewal, revocation)Networking & SecurityManage DNS, TCP/IP networks, and network segmentation.Implement firewalls, VPNs, and Zero Trust principles.Apply cybersecurity frameworks and monitor vulnerabilities.Operating Systems & Patch ManagementMaintain and secure Windows and Linux servers.Utilize SCCM for patch management and compliance reporting.Perform OS hardening and lifecycle management.Microsoft 365 AdministrationManage M365 services including Exchange Online, SharePoint, Teams, and OneDrive.Ensure compliance, security, and availability of collaboration platforms.Implement policies for data governance and identity integration with M365.Automation & ScriptingDevelop scripts in PowerShell, Python, or Bash to automate tasks.Support CI/CD pipelines and cloud enablement.Monitoring & Incident ManagementUse APM tools (AppDynamics) and observability platforms (Splunk) for troubleshooting.Participate in incident/problem management and disaster recovery planning.KNOWLEDGE, SKILLS, AND ABILITIES:Ability to design secure, scalable, and highly available systems across hybrid and cloud environmentsIntegrationCybersecurity FrameworksAbility to lead architecture designAbility to translate business requirements into secure, scalable technical solutions.Performance tuning, capacity planningCloud ComputingQUALIFICATIONS:Bachelor’s degree in Computer Science, Engineering, Information Technology, or related field OR equivalent experienceAdvanced degree with 5+ years of related experience preferred7+ years of progressive experience in systems architecture, platform engineering, or site reliability engineeringHands-on experience with Azure and AWS cloud platformsExpertise in Active Directory, DNS, 802.1X, and certificate lifecycle managementStrong background in Windows and Linux operating systemsProficiency in TCP/IP networking and network security principlesAdministration of Microsoft 365 (M365) services (Exchange Online, SharePoint, Teams)Automation and scripting using PowerShell, Python, or Bash preferredExperience working in a cloud environment (public/private).Knowledge of containerization (Docker, Kubernetes) preferredExperience in incident and problem management, root cause analysis, and disaster recovery planning preferredMINIMUM REQUIREMENTS:US citizenship (without dual citizenship).At least 18 years of age and legally authorized to work in the United States.Active security clearance or ability to obtain one.T-Mobile requires U.S. citizenship for certain roles within the organization. This role requires U.S. citizenship. Individuals hired into this role will be required to submit documentation proving U.S. citizenship within the first 7 days of hire - failure to do so will result in terminationBase Pay Range: $114,800 - $207,200Corporate 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=REQ345685¶dox=1At 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, 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 ApplicantAccommodation@t-mobile.com or calling 1-844-873-9500. 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: Herndon, VirginiaType: Full time