TISTA Science and Technology Corporation

Full-stack Engineer

• Design, code, test and deploy features and defect fixes in two-week sprints
• Build REST APIs and integrations with VA enterprise services, including ESB, HL7, FHIR and VALIP
• Write unit and integration tests
• Keep code scanning with SonarQube and Fortify passing in CI/CD
• Refactor legacy applications for VAEC and container hosting
• Provide Tier 3 fixes, including code changes, defect corrections and security remediation
• Follow secure coding per VA Handbook 6500
• Follow Section 508 accessibility standards

Explore Full Stack Developer at TISTA Science and Technology…. Review requirements and application details.

Full Stack Developer

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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AI Engineer

• Build and validate ML models for inventory and demand forecasting
• Document model validation
• Automate identification and validation of product substitutions during supply disruptions
• Build LLM and agentic workflows inside 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

Cloud Engineer

• Provision and operate VAEC environments, OpenShift clusters and RHEL hosts
• Automate infrastructure and deployments with Terraform, Ansible and CI/CD pipelines
• Carry out cloud migrations, disaster recovery and capacity planning
• Manage cloud networking, firewall rules, IAM and monitoring
• Produce architecture, data-flow and cloud security documentation

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SDET

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

Explore Test Automation Engineer at TISTA Science and Technology…. Review requirements and application details.

Test Automation Engineer

• Design, code, test, and deploy features and defect fixes in two-week sprints
• Build REST APIs and integrations with VA enterprise services, including ESB, HL7, FHIR, and VALIP
• Write unit and integration tests
• Keep code scanning tools such as SonarQube and Fortify passing in CI/CD
• Refactor legacy applications for VAEC and container hosting
• Provide Tier 3 fixes, including code changes, defect corrections, and security remediation
• Follow secure coding requirements under VA Handbook 6500
• Follow Section 508 accessibility standards

• 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

• Provision and operate VAEC environments, OpenShift clusters, and RHEL hosts
• Automate infrastructure and deployments with Terraform, Ansible, and CI/CD pipelines
• Carry out cloud migrations, disaster recovery, and capacity planning
• Manage cloud networking, firewall rules, IAM, and monitoring
• Produce architecture, data-flow, and cloud security documentation

Data Engineer

• Plan and run data migrations from legacy systems (VistA, Maximo, DMLSS) to modern platforms
• Write data migration plans
• Build ETL/ELT pipelines in Databricks using PySpark and Spark SQL
• Build ETL/ELT pipelines in VALIP
• Write and maintain data mapping and validation plans
• Reconcile and validate data after each load
• Mask and sanitize production data for lower environments
• Support data extraction and analytics requests
• Support decommissioning data archives

Explore Data Engineer – Migration Specialist at TISTA Science and Technology…. Review requirements and application details.

Data Engineer – Migration Specialist

• Design logical and physical data models for supply chain products and the VALIP lakehouse using Delta Lake and Unity Catalog
• Design databases for migrations to VA sites and the cloud
• Establish data governance, quality, lineage, and access standards aligned with VA data policy
• Tune performance across SQL Server, Oracle, Postgres, and Databricks
• For senior-level roles, administer databases, including backups, patching, and environment refreshes

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Data Architect

DevOps Engineer

• 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

Explore DevOps Engineer at TISTA Science and Technology…. Review requirements and application details.

• 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

Explore Release Train Engineer – Release Manager at TISTA Science and Technology…. Review requirements and application details.

Release Train Engineer – Release Manager

• 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

Open roles

Full Stack Developer

Business Analyst

Data/AI Developer

Cloud Engineer

Test Automation Engineer

Full Stack Developer

Data/AI Developer

Cloud Engineer

Data Engineer – Migration Specialist

Data Architect

DevOps Engineer

Data/AI Developer

Release Train Engineer – Release Manager

Data Architect

Data Engineer – Migration Specialist