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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr. Systems Engineer, Platform/Infrastructure - **Company:** The Modern - **Location:** Sterling, VA, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Active Directory, Application Programming Interfaces (APIs), Systems Engineering, Microsoft Azure, Cloud Computing, Cloud Engineering, Cyber Security, System Configuration, Extract Transform Load (ETL), Data Visualization, Linux, IBM Cloud Computing, Identity and Access Management, PostgreSQL, Log Files, Automation of Marketing, MongoDB, MySQL, OAuth, OpenID, OpenLDAP, Queueing Systems, Cloud Services, Ansible, Security Assertion Markup Language (SAML), Data Streaming, System Testing, Systems Integration, Virtualization Technology, Enterprise Application Integration, Google Cloud, Cloud Platform System, DevOps Tools - Open-source, System Availability, Grafana, Gitlab, Event Driven Architecture, Kubernetes, Deployment Automation, Rancher, Non-relational Database, Graphql, Api Gateway, Terraform, Oracle Cloud Infrastructure, Splunk, Jenkins, Servicenow - **Published:** July 24, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=469278fa1adbf0ac ## About the Role * Must possess an active DoD TS/SCI security clearance with CI Polygraph. * Must meet DoD 8140 requirements, including Security+ CE certification. * Bachelor's or master's degree in a STEM field. * 10+ years of experience working with Linux platforms and COTS applications in cloud environments. * Experience with cloud architecture, system design, and enterprise application integration. * Experience supporting relational and non-relational databases including PostgreSQL, MySQL, and MongoDB. * Experience supporting IdAM technologies including Active Directory, SAML, OpenLDAP, OAuth 2.0, and OIDC. * Experience with DevOps tooling including Ansible, Terraform, Jenkins, and GitLab. * Familiarity with containerized development environments including Rancher and Kubernetes. PREFERRED SKILLS AND QUALIFICATIONS * Experience with Model-Based Systems Engineering (MBSE) environments and tools. * Experience optimizing cloud-hosted solutions and supporting Azure, Google Cloud Platform (GCP), Oracle Cloud Infrastructure (OCI), IBM Cloud, or similar environments. * Experience configuring and instrumenting monitoring and visualization tools such as Grafana and Splunk. * Experience implementing and integrating ServiceNow solutions. * Familiarity with customer security requirements and processes within classified environments. * Experience supporting virtualization technologies and application streaming or layering techniques. * Experience designing APIs including REST or GraphQL and event-driven systems. * Experience maintaining API gateways and catalogs within cloud-based environments. * Experience integrating complex systems using APIs, message queues, streaming platforms, and ETL pipelines. * Experience leading from a total system perspective across cloud services, infrastructure, and security domains. *Applicants selected will be United States citizens and may be subject to a government security investigation for access to classified information.* ## Description MGS is seeking a Sr. Systems Engineer, Platform/Infrastructure to deploy, administer, and sustain Linux-based platforms and COTS applications within secure cloud environments in support of national security missions. In this role, you will design and maintain cloud architecture, troubleshoot complex system and application issues, and integrate enterprise services to ensure platform reliability and mission readiness. Working alongside engineering, cybersecurity, and infrastructure teams, you will keep critical environments running and implement improvements that directly enable mission delivery., * Deploy, administer, and maintain Linux platforms and COTS applications within cloud-hosted environments. * Design and support cloud architecture and system integrations, including workflow, ticketing, and automation platforms such as ServiceNow. * Troubleshoot complex system, application, and infrastructure issues using log file analysis and root-cause analysis techniques. * Administer relational and non-relational databases including PostgreSQL, MySQL, and MongoDB. * Support Identity and Access Management (IdAM) solutions including Active Directory, SAML, OpenLDAP, OAuth 2.0, and OIDC. * Implement and maintain DevOps automation using Ansible, Terraform, Jenkins, and GitLab. * Support containerized environments utilizing Rancher, Kubernetes, or similar technologies. * Conduct system testing and validation to ensure operational readiness. * Create and maintain technical documentation, implementation guides, and operational procedures. ## Related Videos - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [MySQL Protocol Features You Should Be Aware Of](https://www.wearedevelopers.com/videos/100267-mysql-protocol-features-you-should-be-aware-of) - [Keeping applications secure by evolving OAuth 2.0 and OpenID Connect](https://www.wearedevelopers.com/videos/100152-keeping-applications-secure-by-evolving-oauth-2-0-and-openid-connect) - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) - [Discover the open source trio you didn’t expect: .NET and PostgreSQL on Linux](https://www.wearedevelopers.com/videos/2042-discover-the-open-source-trio-you-didn-t-expect-net-and-postgresql-on-linux) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) ## Related Articles - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [7 Cloud Computing Trends Coming in 2025 for Developers](https://www.wearedevelopers.com/magazine/412-7-cloud-computing-trends-coming-in-2025-for-developers)