Jobs at Sigma Defense Systems LLC

Serves as senior technical authority for architecting, modernizing, integrating, and sustaining containerized systems across Navy environments. Leads microservices architecture, container orchestration, CI/CD and DevSecOps automation, system troubleshooting, configuration management, requirements traceability, cybersecurity remediation, and cloud transition planning. Develops DoDAF-compliant architecture views and applies MBSE tools including Cameo, MagicDraw, and Enterprise Architect. Coordinates Agile engineering activities and supports modernization and sustainment across shipboard and shore environments.

Leads full-lifecycle software engineering, integration, modernization, and deployment for mission-critical systems. Responsibilities include Agile planning, technical leadership, architecture development, requirements traceability, configuration management, CI/CD and DevSecOps execution, troubleshooting, cybersecurity coordination, and DoDAF-compliant architecture modeling. The role applies MBSE methods, microservices, RESTful APIs, containerization, cloud transition strategies, and secure software delivery while coordinating with government stakeholders and engineering teams.

Facilitates Scrum ceremonies, coordinates cross-functional engineering teams, tracks sprint progress and dependencies, removes impediments, maintains Jira boards and documentation, and supports backlog management and stakeholder communication. The role promotes Agile practices, continuous improvement, engineering collaboration, system integration, testing, network deployment, and alignment with program milestones and mission objectives.

Provides application and tactical network systems integration analysis, solution development, testing, documentation, and automation. Acts as liaison among systems engineering, testing, and application teams; develops HACSIM and CANES integration documentation; maintains tactical network mockups; supports lab testing and issue mitigation; and automates repeatable integration processes using PowerShell, Ansible, Git, and Bitbucket. Requires U.S. citizenship, a bachelor's degree, relevant experience, certifications, and an active Secret clearance or higher.

Provides integration solution analysis and develops integration designs for tactical network systems. The role coordinates between systems engineering, testing, and application providers; supports lab testing and issue mitigation; maintains engineering mockups; prepares technical and configuration documentation; and automates repeatable integration processes using PowerShell, Ansible, Git, and Bitbucket. The position supports continuous integration and delivery for CANES integration systems and requires U.S. citizenship, certifications, a bachelor’s degree, and Secret clearance eligibility.

The Network Security Engineer II implements DoD cybersecurity policies across CANES systems, designs and troubleshoots vulnerability solutions, hardens Windows and Linux environments, and supports patching, scanning, incident response, log analysis, audits, and validation events. The role also engineers SIEM, ACAS, and Trellix ESS configurations, automates platform updates, maintains cybersecurity documentation, and submits configuration changes through GitLab, GitHub, and Spork.

Enforce DoD cybersecurity policies across CANES environments; harden Windows and Linux systems, applications, network devices, and hardware; manage vulnerabilities, patching, scanning, logging, incident response, and audit readiness; maintain cybersecurity documentation and artifacts; support validation events and installations; and automate configurations using ACAS, Trellix ESS, SIEM platforms, GitLab, GitHub, and Spork/Spork+.

Manages configuration management records and Service Request Form validation, routing, tracking, and reporting. Serves as a subject matter expert for application system integration, CMPro workflows, queries, and portfolio management. Maintains application lists and process artifacts, coordinates risk assessment and review materials, supports application providers, monitors process deficiencies, recommends resolutions, and provides status metrics and updates to management.

Provides Tier 2, 24/7 network help desk support for MQ-9 communications systems and global network architectures. Troubleshoots routing, switching, multicast, firewall, circuit-to-packet, and network device issues; monitors performance; configures and maintains network equipment; analyzes logs and isolates root causes; documents tickets, station logs, diagrams, and IP schemes; supports testing, configuration updates, and network improvements.

Creates and maintains technical documentation, including user manuals, test plans, technical specifications, procedure manuals, and process documentation. Researches complex subject matter, collaborates with subject-matter experts and development teams, edits content, organizes documentation repositories, and develops alternative media formats. The role requires strong writing skills, attention to detail, independent work, multitasking, and the ability to obtain an active Secret clearance.

Leads a multidisciplinary technical team as Scrum Master and site lead, coordinating customer priorities, Agile ceremonies, dependencies, risks, impediments, delivery commitments, and status reporting. Interfaces with technical personnel, program leadership, and government customers while supporting software, cloud, DevSecOps, cybersecurity, infrastructure, networking, and application-support activities. Promotes collaboration, accountability, continuous improvement, and mission alignment across distributed teams.

Develop and support secure web applications for DoD and regulated environments. Build React and TypeScript interfaces, Python-based REST APIs, PostgreSQL databases, authentication and RBAC systems, and Windows Server deployments. Maintain JSON schemas, troubleshoot software, optimize performance, support offline environments, and document architecture and operational procedures. Collaborate with developers, testers, administrators, subject matter experts, and end users to deliver application features.

Provides Tier 1 and Tier 2 technical support for FMV applications and services. Troubleshoots playback, streaming, access, latency, buffering, connectivity, and application issues; documents and tracks incidents; communicates resolutions; escalates complex problems; validates application updates; and maintains troubleshooting documentation. The role supports DoD or intelligence-related operational users and requires Security+ certification plus an active or obtainable Secret clearance.

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.