Principal Systems Engineer; Government

This is a full-time onsite role based in the location(s) posted and is performed from the designated work location five days per week. No relocation is offered. AT&T Global Public Sector is a trusted provider of secure, IP enabled, cloud-based, network solutions and professional services to the Federal Government. We are dedicated to recruiting, developing and empowering a diverse, high-performing workforce that is passionate about what they do, committed to our shared values and dedicated to our customers’ mission.

The Principal Systems Engineer – OSS Design & Architecture is a senior individual contributor responsible for supporting the design, development, integration, and documentation of Operations Support Systems (OSS) capabilities for a critical government program. The position works closely with the program’s engineering team to ensure OSS capabilities are effectively integrated into the overall system architecture. This role focuses on translating technical and operational requirements into practical OSS designs, interfaces, and system capabilities.

The Principal Systems Engineer will perform detailed systems engineering analysis across network management, monitoring, service assurance, configuration, inventory, performance management, fault management, security, reporting, and related operational support functions. The position requires strong hands‑on systems engineering experience and the ability to work across network, security, operations, test, and vendor environments to develop technically sound, scalable, supportable, and testable OSS solutions.

• Support the Chief Engineer and Systems Lead in the development and maturation of the end-to-end OSS architecture.
• Develop and document system architecture, functional requirements, system interfaces, data flows, dependencies, and integration requirements associated with OSS capabilities.
• Translate program, technical, operational, security, and performance requirements into detailed system and subsystem requirements.
• Develop and maintain OSS‑related content supporting the High‑Level Design (HLD) and Low‑Level Design (LLD).
• Define and document interfaces between OSS platforms, network infrastructure, security systems, operational tools, and other components of the solution.
• Evaluate OSS products, technical approaches, and vendor solutions against defined requirements and architectural objectives.
• Perform technical trade studies and engineering analyses to evaluate design alternatives and support technical decision‑making.
• Identify technical gaps, dependencies, integration issues, and architectural risks and develop recommended technical solutions.
• Develop system requirements and interface definitions necessary to support end‑to‑end service monitoring, management, troubleshooting, and performance analysis.
• Work with operations personnel to understand operational workflows and translate those needs into technical OSS requirements and capabilities.
• Coordinate with test engineering personnel to establish OSS‑related verification requirements, integration scenarios, test objectives, and acceptance criteria.
• Participate in architecture reviews, design reviews, engineering working groups, technical interchange meetings, and system integration activities.
• Prepare and review technical documentation including architecture diagrams, interface definitions, requirements, engineering analyses, design specifications, and technical decision documentation.
• Maintain traceability between program requirements, system requirements, architecture, detailed design, implementation, and verification activities.

Customer Specific Clearance (#clearable)

• Bachelor’s degree in Systems Engineering,…