TISTA Science and Technology Corporation

Data Engineer

• Design logical and physical data models for supply chain products and the VALIP lakehouse (Delta Lake, Unity Catalog)
• Design databases for migrations to VA sites and the cloud
• Set data governance, quality, lineage and access standards in line with VA data policy
• Tune performance across SQL Server, Oracle, Postgres and Databricks
• Perform database administration, backups, patching and environment refreshes for senior-level roles

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Data Architect

AI Engineer

• Build and validate machine learning models for inventory and demand forecasting
• Document model validation
• Automate identification and validation of product substitutions during supply disruptions
• Build LLM and agentic workflows within a governed, auditable AI operating model
• Run MLOps on Databricks, including MLflow, model serving, and monitoring
• Deliver dashboards and analytics for supply chain stakeholders

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Data/AI Developer

Scrum Master

• Facilitate sprint planning, daily scrum, backlog refinement, sprint review, and retrospective in two-week sprints
• Keep sprint backlogs, impediments, risks, and Agile metrics current in VA Jira
• Coach the team and the VA Product Owner on SAFe 6.0 practice
• Feed team objectives, capacity, and dependencies into PI Planning
• Escalate risks and blockers to the Release Train Engineer and program leadership

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Full-stack Engineer

• Design and build HL7, FHIR, EDI, XML and API interfaces on InterSystems HealthShare/IRIS and OpenShift
• Own interface control documents and integration test plans and results
• Build bi-directional interfaces between legacy and modernized financial and asset systems
• Set integration standards, code review and CI/CD for the integration team
• Lead and mentor integration engineers

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Integration Lead Engineer

DevOps Engineer

• Facilitate PI Planning, system demos, and Inspect & Adapt
• Maintain iteration and PI calendars
• Coach Scrum Masters
• Manage cross-team risks and dependencies
• Maintain ServiceNow release calendar entries
• Coordinate with VA Release Agents
• Assemble release packages, including test results, scans, and documentation
• Lead go-lives and post-release closure
• Report release and flow metrics to the Program Manager

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Release Train Engineer – Release Manager

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Release Train Engineer / Release Manager

Business Analyst

• Run backlog refinement
• Decompose initiatives into epics, features and user stories with acceptance criteria
• Maintain the requirements package and full traceability from requirements to tests in VA tools
• Facilitate elicitation sessions, workshops and stakeholder reviews with VA logisticians and clinicians
• Draft requirements analysis proposals for new intake requests, including scope, level of effort and labor mix
• Analyze data and build reports and process models
• Support UAT and release validation

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SDET

• Write test plans, cases, and scripts from user stories and acceptance criteria
• Build and maintain automated test suites using Selenium, Cypress, Playwright, and Postman in CI/CD
• Perform functional, integration, regression, and Section 508 testing
• Support user acceptance testing (UAT)
• Maintain the requirements traceability matrix
• Log defects in VA tools
• Report test results and coverage for release readiness

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Test Automation Engineer

Solutions Engineer

• Build AS-IS and TO-BE architecture models in VA-prescribed DoDAF/UAF formats
• Own the SAFe Architectural Runway
• Own each product's Solution Architecture Package
• Align designs to the VA Technical Reference Model, Zero Trust strategy, and VAEC/VA Platform One hosting
• Advise on FHIR, ESB/EAI, API, and VALIP integration patterns
• Advise on cloud migration
• Support ATO decisions
• Support DevSecOps maturity assessments
• Support decommissioning alternatives

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Solutions Architect – Cloud, Data

• Build AS-IS and TO-BE architecture models in VA-prescribed DoDAF/UAF formats
• Own the SAFe Architectural Runway and each product's Solution Architecture Package
• Align designs to the VA Technical Reference Model, Zero Trust strategy, and VAEC/VA Platform One hosting
• Advise on FHIR, ESB/EAI, API, and VALIP integration patterns
• Advise on cloud migration
• Support ATO decisions
• Support DevSecOps maturity assessments
• Support decommissioning alternatives

• Build and maintain CI/CD pipelines using GitHub Actions, GitLab, and Jenkins
• Manage artifact promotion controls
• Administer Linux and Windows servers
• Administer OpenShift projects and non-production environments
• Run configuration management
• Maintain the product configuration management plan
• Manage branching, tagging, and versioning
• Administer Jira, Confluence, and GitHub for the program
• Support application monitoring and alerting
• Support patching and after-hours deployment windows
• Design platform standards as a subject matter expert
• Lead hardening and vulnerability-scan remediation
• Mentor others

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• Develop functional testing scenarios and detailed functional test cases
• Build, lead, and deliver test plans, estimates, strategy, and hands-on testing in Salesforce and integrated systems
• Manage project deadlines, time, and schedule in a fast-paced federal environment
• Review and generate complex test plans
• Generate test case data, build procedures, and create testing scripts based on functional specifications
• Execute and coordinate tests
• Log, validate, debug, and document defects
• Maintain DSTRs
• Define level of effort for building test cases
• Assist test lead/manager with functional testing approaches, tools, automation, and documentation
• Interact with federal and contractor functional leads to clarify requirements and scenarios
• Assist federal and contractor resources with User Acceptance Testing
• Respond to developers' questions regarding test results, bugs, and defects
• Communicate frequently with customers and team members, facilitate discussions, and exercise professional judgment

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Salesforce Test Engineer

Security Engineer

• Integrate SAST/DAST, dependency, container and secrets scanning into CI/CD using GitHub, GitLab, Jenkins and SonarQube
• Harden infrastructure-as-code and configurations with Ansible on AWS, Azure and OpenShift
• Run vulnerability scans using ACAS/Nessus
• Track remediation and meet CISA BOD 22-01 timelines
• Produce and maintain ATO evidence, including SSP sections, POA&Ms and control documentation
• Validate controls before release
• Run WASA and Fortify scans
• Sign off on security release criteria

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Open roles

Data Architect

Data/AI Developer

Scrum Master

Integration Lead Engineer

Release Train Engineer – Release Manager

Release Train Engineer / Release Manager

Business Analyst

Test Automation Engineer

Solutions Architect – Cloud, Data

Solutions Architect – Cloud, Data

Scrum Master

Scrum Master

DevOps Engineer

Salesforce Test Engineer

DevSecOps Engineer – Security Specialist