Jobs at Sigma Defense Systems LLC

Develop and test software for electronic warfare systems using C++, Python, Bash, and Linux. Responsibilities include requirements and design specification development, implementation, test planning, system testing, and installation support within a multidisciplinary team. The role requires knowledge of virtualization, containerization, RF signals, and radar technologies, along with the ability to obtain an active Secret clearance.

Leads a team of approximately 20 software engineers developing and maintaining instrumentation radar and threat radar model software. Provides technical leadership, staffing, mentoring, performance management, process improvement, quality assurance, budgeting, proposal support, and customer review participation. Collaborates with program, systems, hardware, quality, recruiting, and human resources teams while ensuring compliance with ISO, CMMI, cybersecurity, and software development standards.

Develops, negotiates, reviews, staffs, and administers bilateral and multilateral international defense agreements. Advises senior leaders, coordinates legal, policy, technical, and international stakeholders, resolves agreement issues, tracks milestones, prepares signature packages, and ensures compliance with disclosure, export-control, fiscal-law, and international-agreements requirements. The role supports RDT&E, acquisition, technology cooperation, logistics, Foreign Military Sales, and security cooperation initiatives.

Develops, negotiates, reviews, staffs, and administers bilateral and multilateral international defense agreements supporting RDT&E, acquisition, technology cooperation, logistics, FMS, and security cooperation. Drafts agreement language, coordinates legal, policy, technical, and international stakeholders, resolves staffing issues, tracks milestones, advises senior leadership, and ensures compliance with disclosure, export control, fiscal law, and international agreements requirements.

Maintains cybersecurity for secure Department of Defense information systems through RMF, vulnerability management, continuous monitoring, STIG compliance, A&A support, POA&M tracking, documentation, audits, and secure Cross Domain Solution operations. Coordinates remediation with system administrators, network engineers, and government stakeholders while maintaining system security baselines and compliance artifacts.

Administer Windows Server and RHEL environments supporting secure Department of War operations. Install, configure, patch, troubleshoot, and maintain physical and virtual servers; manage accounts, storage, services, backups, and system baselines. Implement DISA STIGs, support Cross Domain Solution operations, monitor system health, resolve incidents, and maintain documentation. Collaborate with cybersecurity and network engineering teams on approved infrastructure changes, testing, integration, and disaster recovery.

Support the Government Lead in implementing program initiatives, oversee vendor execution, coordinate reporting and stakeholder communication, resolve team issues, manage risk, and assist budgeting, forecasting, and program infrastructure activities.

Develop and maintain GitLab CI/CD pipelines, GitOps workflows, and reusable automation. Build Azure infrastructure using Bicep or Terraform, integrate security validation, and support deployments across multiple environments. Troubleshoot issues spanning source code, Linux, applications, networking, virtualization, containers, and Azure infrastructure. Collaborate with development and infrastructure teams to automate release processes and improve reliability. The role requires U.S. citizenship, Security+ and AZ-104 certifications, an associate degree, and an active or obtainable TS/SCI clearance.

Systems Engineer III supporting an upcoming Navy contract. Responsibilities include systems engineering at the system level, requirements definition, system design, risk and performance analysis, testing, lifecycle support, Windows and Linux administration, configuration management, and implementation of network, hardware, and software security controls. The role requires U.S. citizenship, an active TS/SCI clearance, and a bachelor's degree in mechanical, electrical, or computer engineering.

Leads the design, maintenance, evolution, troubleshooting, and configuration management of tactical networks supporting the DISA AISR-DT Block 2 architecture. Develops network configurations, integration plans, monitoring and recovery strategies, and architecture modifications. Coordinates configuration delivery and system access while interfacing with government customers, civilian partners, and leadership. Ensures network performance, security, compliance, and responsiveness to changing operational demands.

Develop, test, and deliver software for the Remotely Operated Tracking Radar 1 system at the China Lake Range. The role supports radar hardware functionality, testing, evaluation, and validation missions for the Naval Air Warfare Center Weapons Division. Responsibilities include real-time C++ development using Red Hat Linux, servo software, data filtering, and Eclipse or Qt development environments. The engineer works under a Senior Software Lead and contributes to radar, optical sensor, and servo-related software development.

Develop and deploy Java applications and microservices on RHEL/Linux, support containerized hosting and VMware hypervisors, create scripts and deployment automation, follow Agile processes, harden systems to DISA STIG/RMF guidance, and produce test plans and engineering documentation for PEO C4I baselines.

Provides senior cybersecurity engineering support across system lifecycles, implementing DoD RMF and Zero Trust controls. Performs ACAS vulnerability assessments, remediation validation, continuous monitoring, Azure security architecture, Azure Policy administration, and Defender for Cloud security posture management. Develops Xacta automation and Infrastructure as Code workflows for evidence collection, compliance validation, and continuous authorization. Collaborates with cloud, DevSecOps, architecture, and security teams while supporting assessments and authorization activities.

Supports U.S. Navy enterprise networks through systems design, development, integration, configuration, troubleshooting, automation, patching, and lifecycle engineering. Develops Ansible, PowerShell, Python, and Bash tools; integrates Windows, Linux, and virtualized environments; performs root cause analysis; and supports DoD cybersecurity compliance, STIG implementation, RMF validation, testing, installations, and readiness reviews.

Design, build, secure, automate, and operate enterprise Kubernetes infrastructure on Azure, primarily AKS. Responsibilities include cluster architecture, Terraform and Bicep infrastructure as code, Helm and GitOps deployments, networking, identity, RBAC, secrets management, observability, security, resiliency, backup, recovery, lifecycle management, and technical mentorship.

Develop, modernize, test, and sustain mission-critical Java and web applications for government environments. Support TypeScript and Vue.js modernization, Oracle procedures and database functions, security compliance, STIG activities, certificate management, troubleshooting, documentation, and Agile development. Collaborate with government stakeholders and technical teams through peer programming, sprint ceremonies, demonstrations, and technical reporting.

Implement and assess cybersecurity controls across information systems and Microsoft Azure environments. Support DoD RMF activities, Zero Trust implementation, ACAS vulnerability scanning, remediation tracking, Azure Policy administration, Microsoft Defender for Cloud assessments, Xacta documentation, infrastructure automation, continuous monitoring, and security-control evidence collection. Collaborate with cloud engineers, system administrators, DevSecOps teams, ISSOs, and cybersecurity personnel while documenting configurations and remediation activities.

Designs, implements, and supports complex Microsoft Azure network infrastructure, including VNets, routing, firewalls, segmentation, private connectivity, hybrid connectivity, and network security controls. Troubleshoots routing, DNS, firewall, latency, and application communication issues; analyzes traffic flows and logs; supports Zero Trust architectures and infrastructure automation. Collaborates with cloud, cybersecurity, infrastructure, application, and systems teams in regulated DoD and Azure Government environments.

Deploys, administers, monitors, and troubleshoots Azure Virtual Desktop environments, including host pools, session hosts, images, applications, FSLogix profiles, scaling plans, networking, identity, and security controls. Develops automation using PowerShell, Azure CLI, and infrastructure-as-code tools. Supports Windows desktop environments, user experience optimization, vulnerability remediation, Azure governance, and secure access requirements in regulated or DoD environments.

Design and execute system-level tests for DoD systems, develop requirements and test plans, implement and maintain automated test frameworks, integrate tests into CI/CD pipelines, troubleshoot software defects, and support system installation and verification.