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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # System Engineer III - **Company:** Reflexive Concepts - **Location:** San Antonio, TX, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Amazon Web Services, Systems Engineering, Confluence, JIRA, Command-Line Interface, Configuration Management, Information Systems, Linux, Elasticsearch, Network Interface Controllers, Data Flow Control, Monitoring of Systems, Nagios, Redis, Prometheus, Service-Oriented Architecture, Systems Architecture, Systems Integration, Virtualization Technology, Grafana, Kubernetes, Information Technology, Rancher, Apache Nifi, DODAF, Data Pipelines, Docker - **Published:** October 17, 2026 - **Apply:** https://www.careerbuilder.com/job-details/system-engineer-iii-san-antonio-tx--36f78b42-3210-44e6-88e5-4cc075b3117b ## About the Role * Twenty (20) years' experience as a SE in programs and contracts of similar scope, type, and complexity * Bachelor's degree in System Engineering, Computer Science, Information Systems, Engineering Science, Engineering Management, or related discipline from an accredited college or university + Five (5) years of additional SE experience may be substituted for a bachelor's degree Required: * Security+ certification (or ability to obtain within six months) * Linux and command-line proficiency * Hardware, software, network, and data-flow troubleshooting * Clear communication and documentation skills * Ability to follow and maintain SOPs, prioritize incidents, and work independently in a 24×7 environment * Experience with Jira, Confluence, Rancher, Elasticsearch, Redis, NiFi, Docker, Kubernetes, AWS, and virtualization * Experience with monitoring tools such as Nagios, Grafana, and Prometheus * Demonstrated experience planning and leading Systems Engineering efforts * Ability to work rotating 12-hour day or night shifts on a two-week schedule (Central time zone) ## Description Reflexive Concepts is seeking a skilled System Engineer to join our Watch Desk team! Specifically, we are looking for two (2) Watch Desk Engineers to monitor and maintain mission systems around the clock.The Work:Monitor system health, availability, performance, and data pipelinesInvestigate alerts and incidents and perform authorized recovery actionsEscalate unresolved issues to the appropriate teamsMaintain tickets, shift logs, SOPs, metrics, and reportsProvide concise status updates and effective shift handoffsResponsibilities:Develop and review systems engineering documentation, including System Engineering Plans, Initial Capabilities Documents, requirements specifications, and Interface Control DocumentsElicit, derive, allocate, and manage system and derived requirements, with formal change control and traceability to source requirementsDefine, design, and control hardware and software interfaces, captured in a common interface format and shared repositoryDevelop system architectures, design alternatives, and operational concepts using DoDAF and SOA; conduct trade studies and Analysis of Alternatives (AoA)Plan and coordinate system integration and verification activities across multiple teamsAssess, mitigate, and monitor program risks, including through earned value management (EVM) dataManage configuration and the system baseline across the lifecycle; serve on the Configuration Control Board (CCB) and Integrated Product TeamsSupport DoD Certification & Accreditation, JCIDS documentation, and derived Information Assurance requirementsPerform quantitative analysis of non-functional performance (reliability, maintainability, survivability, etc.) and use models, simulations, and prototyping to reduce riskProvide technical direction for development, integration, and testing; review WBS, work packages, and IMP; apply agency, national, and international standardsQualifications:Twenty (20) years' experience as a SE in programs and contracts of similar scope, type, and complexityBachelor's degree in System Engineering, Computer Science, Information Systems, Engineering Science, Engineering Management, or related discipline from an accredited college or university Five (5) years of additional SE experience may be substituted for a bachelor's degreeRequired:Security+ certification (or ability to obtain within six months)Linux and command-line proficiencyHardware, software, network, and data-flow troubleshootingClear communication and documentation skillsAbility to follow and maintain SOPs, prioritize incidents, and work independently in a 24×7 environmentExperience with Jira, Confluence, Rancher, Elasticsearch, Redis, NiFi, Docker, Kubernetes, AWS, and virtualizationExperience with monitoring tools such as Nagios, Grafana, and PrometheusDemonstrated experience planning and leading Systems Engineering effortsAbility to work rotating 12-hour day or night shifts on a two-week schedule (Central time zone) Reflexive Concepts is seeking a skilled System Engineer to join our Watch Desk team! Specifically, we are looking for two (2) Watch Desk Engineers to monitor and maintain mission systems around the clock.The Work:Monitor system health, availability, performance, and data pipelinesInvestigate alerts and incidents and perform authorized recovery actionsEscalate unresolved issues to the appropriate teamsMaintain tickets, shift logs, SOPs, metrics, and reportsProvide concise status updates and effective shift handoffsResponsibilities:Develop and review systems engineering documentation, including System Engineering Plans, Initial Capabilities Documents, requirements specifications, and Interface Control DocumentsElicit, derive, allocate, and manage system and derived requirements, with formal change control and traceability to source requirementsDefine, design, and control hardware and software interfaces, captured in a common interface format and shared repositoryDevelop system architectures, design alternatives, and operational concepts using DoDAF and SOA; conduct trade studies and Analysis of Alternatives (AoA)Plan and coordinate system integration and verification activities across multiple teamsAssess, mitigate, and monitor program risks, including through earned value management (EVM) dataManage configuration and the system baseline across the lifecycle; serve on the Configuration Control Board (CCB) and Integrated Product TeamsSupport DoD Certification & Accreditation, JCIDS documentation, and derived Information Assurance requirementsPerform quantitative analysis of non-functional performance (reliability, maintainability, survivability, etc.) and use models, simulations, and prototyping to reduce riskProvide technical direction for development, integration, and testing; review WBS, work packages, and IMP; apply agency, national, and international standardsQualifications:Twenty (20) years' experience as a SE in programs and contracts of similar scope, type, and complexityBachelor's degree in System Engineering, Computer Science, Information Systems, Engineering Science, Engineering Management, or related discipline from an accredited college or university Five (5) years of additional SE experience may be substituted for a bachelor's degreeRequired:Security+ certification (or ability to obtain within six months)Linux and command-line proficiencyHardware, software, network, and data-flow troubleshootingClear communication and documentation skillsAbility to follow and maintain SOPs, prioritize incidents, and work independently in a 24×7 environmentExperience with Jira, Confluence, Rancher, Elasticsearch, Redis, NiFi, Docker, Kubernetes, AWS, and virtualizationExperience with monitoring tools such as Nagios, Grafana, and PrometheusDemonstrated experience planning and leading Systems Engineering effortsAbility to work rotating 12-hour day or night shifts on a two-week schedule (Central time zone)