Principal/Sr Principal Infrastructure Engineer

RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Top Secret TRAVEL: Yes, 10% of the Time Description At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people's lives around the world today, and for generations to come. Our pioneering and inventive spirit has enabled us to be at the forefront of many technological advancements in our nation's history - from the first flight across the Atlantic Ocean, to stealth bombers, to landing on the moon. We look for people who have bold new ideas, courage and a pioneering spirit to join forces to invent the future, and have fun along the way. Our culture thrives on intellectual curiosity, cognitive diversity and bringing your whole self to work — and we have an insatiable drive to do what others think is impossible. Our employees are not only part of history, they're making history. We have an opening for a Principal/Senior Principal Infrastructure Engineer to join our Product Security Engineering team supporting the secure development and operation of production infrastructure and software products for space systems. In this role, you will help design, build, automate, secure, and sustain the infrastructure and shared services that enable mission-critical software development and operations. You will work alongside infrastructure, software, DevOps, and cybersecurity engineers to operate reliable platforms, modernize engineering workflows, and ensure our systems remain secure, resilient, and maintainable throughout their lifecycle. This position is 100% on-site in Dulles, Virginia . Job Responsibilities • Own the deployment, operation, maintenance, and lifecycle management of production infrastructure and shared platform services across Windows, Linux, network, and virtualized environments. • Work as part of an integrated infrastructure team, collaborating with fellow engineers, ISSOs, and ISSEs to translate operational and security requirements into maintainable solutions and resolve vulnerabilities, configuration findings, and production issues. • Administer Microsoft Active Directory, Group Policy, DNS, RADIUS, and other core identity and network services supporting production systems. • Deploy, configure, patch, harden, monitor, and troubleshoot Windows and Linux servers in accordance with organizational security, availability, and performance requirements. • Administer VMware ESXi/vSphere environments, including virtual machines, storage, networking, capacity planning, availability, upgrades, and lifecycle management. • Configure, maintain, and troubleshoot Cisco network infrastructure, including switching, routing, VLANs, segmentation, access controls, and connectivity between systems and services. • Develop and maintain Ansible playbooks, scripts, and reusable automation to standardize provisioning, configuration management, system administration, and other recurring tasks. • Apply Infrastructure-as-Code and GitOps practices using version control, peer review, automated validation, configuration baselines, and controlled deployment of infrastructure changes. • Implement and maintain monitoring, logging, alerting, backup, recovery, and operational health capabilities for production infrastructure services. • Troubleshoot complex infrastructure issues across compute, virtualization, networking, storage, authentication, and application dependencies, including root-cause analysis and corrective action. • Maintain infrastructure architecture, configuration standards, runbooks, and as-built documentation while driving automation, modernization, reliability, security, and reduction of technical debt.   Basic Qualifications: • Principal: 5 Years with Bac