TISTA Science and Technology Corporation

Security Engineer

• Architect enterprise data platforms supporting large-scale cybersecurity operations across cloud and on-premises environments
• Design and implement scalable ETL/ELT data pipelines integrating structured and unstructured data from multiple enterprise systems
• Lead enterprise architecture modernization initiatives, replacing legacy platforms with secure, cloud-enabled data solutions
• Develop secure REST APIs and enterprise integrations for high-volume data exchange and system interoperability
• Establish DevSecOps and CI/CD practices to automate deployments, improve release quality, and support multi-environment hosting
• Optimize database performance, data models, and platform scalability for terabytes of daily data processing and thousands of concurrent users
• Implement data governance, quality, security, and observability standards aligned with FISMA, RMF, and NIST compliance requirements
• Mentor engineers, drive solution architecture, and coordinate cross-functional teams throughout the project lifecycle
• Develop executive dashboards, analytics, and data visualizations for senior leadership and operational decision-making
• Support business development and proposal efforts by authoring technical solutions, architecture documentation, proof-of-concepts, and RFP/RFI responses

Explore Senior Cybersecurity Specialist at TISTA Science and Technology…. Review requirements and application details.

Senior Cybersecurity Specialist

Systems Engineer

• Install, configure, and maintain IBM mainframe operating systems, including IBM z/OS
• Install, upgrade, and maintain ISV products using tools such as SMP/E
• Customize system parameters, libraries, and subsystems to meet organizational requirements
• Apply maintenance including PTFs and APARs
• Plan and execute system IPLs
• Troubleshoot system issues, analyze dumps, and resolve software-related problems
• Support storage management processes including DASD, SMS, and DFSMS
• Maintain documentation for system configurations, procedures, and changes
• Collaborate with application teams, operations, and vendors on problem resolution and enhancements
• Participate in an on-call rotation and support after-hours maintenance windows

Explore Technical Applications/Systems Analyst, IBM Mainframe at TISTA Science and Technology…. Review requirements and application details.

Technical Applications/Systems Analyst, IBM Mainframe

SDET

• Develop and review comprehensive test plans
• Execute test plan activities
• Create test cases, test data, procedures, and test scripts based on functional requirements
• Coordinate and perform functional, integration, and regression testing
• Oversee the defect management process and report issues
• Share testing progress with the scrum team and product management
• Present product demonstrations to scrum team members, product owners, and management for acceptance and feedback
• Track project timelines and report task progress
• Identify blockers or impediments affecting work deliverables
• Engage in scrum ceremonies and contribute to the team’s overall success
• Organize and manage testing-related user stories and tasks on the scrum board
• Serve as liaison between business, design, development, and testing teams on EDI-related questions and clarifications
• Support test leads/managers in defining and enhancing testing strategies, selecting tools, exploring automation, and improving documentation
• Collaborate with federal and contractor leads to clarify requirements and testing scenarios
• Assist federal and contractor teams with User Acceptance Testing
• Communicate regularly with customers and team members, facilitate discussions, and apply professional judgment

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

Senior EDI Test 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 ACAS/Nessus vulnerability scans
• Track vulnerability remediation and meet CISA BOD 22-01 timelines
• Produce and maintain ATO evidence, including SSP sections, POA&Ms and control documentation
• Validate security controls before release
• Run WASA and Fortify scans
• Sign off on security release criteria

Explore DevSecOps Engineer – Security Specialist at TISTA Science and Technology…. Review requirements and application details.

DevSecOps Engineer – Security Specialist

Full-stack Engineer

• Serve as the main technical contact to VA for assigned products
• Guide build planning, sprint execution and releases
• Maintain each product's architecture package, AS-IS/TO-BE models, interface control documents and change requests
• Lead backlog refinement with the VA Product Owner
• Decompose epics into features and stories with acceptance criteria
• Oversee CI/CD in VA-approved tools
• Drive ATO upkeep and security remediation
• Lead Tier II/III troubleshooting and sustainment
• Provide technical input to PI Planning
• At Senior level, lead several teams or a sub-product line
• Mentor other technical leads
• Represent the product at program governance

Explore Technical Lead at TISTA Science and Technology…. Review requirements and application details.

Technical Lead

• Install, configure, and maintain IBM mainframe operating systems, including IBM z/OS
• Perform installation, upgrades, and maintenance of ISV products using tools such as SMP/E
• Customize system parameters, libraries, and subsystems to meet organizational requirements
• Apply maintenance including PTFs and APARs
• Plan and execute system IPLs
• Troubleshoot system issues, analyze dumps, and resolve software-related problems
• Support storage management processes including DASD, SMS, and DFSMS
• Maintain documentation for system configurations, procedures, and changes
• Collaborate with application teams, operations, and vendors on problem resolution and enhancements
• Participate in an on-call rotation and support after-hours maintenance windows

Explore Senior System Engineer, IBM Mainframe at TISTA Science and Technology…. Review requirements and application details.

Senior System Engineer, IBM Mainframe

Analyst

• Administer and monitor the Microsoft Admin Center and Entra ID environment in support of enterprise agreement governance
• Track identity, licensing, and entitlement status across the enterprise Microsoft tenant
• Conduct utilization and trend analysis of Microsoft licensing and product usage
• Analyze licensing data to identify usage patterns, discrepancies, and potential optimization opportunities
• Research entitlement management options and evaluate underused or unused features for potential cost-recovery opportunities
• Research new Microsoft product offerings and viable alternatives and assess alignment with VA functional requirements
• Validate and maintain product and license reference tables, including additions, updates, and corrections
• Prepare and deliver technical presentations translating licensing, utilization, and product data into actionable findings for EISO leadership
• Recommend potential adjustments to the software licensing mix based on utilization findings
• Maintain SLA tracking and security/compliance posture reporting related to the Microsoft enterprise agreement
• Develop documentation and reporting to support program-level decision-making
• Collaborate with technical, program, and business stakeholders to communicate findings and support enterprise licensing initiatives

Explore Senior PMO Analyst at TISTA Science and Technology…. Review requirements and application details.

Senior PMO Analyst

• Serve as the main technical contact to VA for assigned products
• Guide build planning, sprint execution and releases
• Maintain each product's architecture package, AS-IS/TO-BE models, interface control documents and change requests
• Lead backlog refinement with the VA Product Owner
• Decompose epics into features and stories with acceptance criteria
• Oversee CI/CD in VA-approved tools
• Drive ATO upkeep and security remediation
• Lead Tier II/III troubleshooting and sustainment
• Provide technical input to PI Planning
• For Senior roles, lead several teams or a sub-product line
• Mentor other leads
• Represent the product at program governance

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

Explore DevSecOps Engineer, Security Specialist at TISTA Science and Technology…. Review requirements and application details.

DevSecOps Engineer, Security Specialist

• Serve as the main technical contact to VA for assigned products
• Guide build planning, sprint execution and releases
• Maintain each product's architecture package, AS-IS/TO-BE models, interface control documents and change requests
• Lead backlog refinement with the VA Product Owner
• Decompose epics into features and stories with acceptance criteria
• Oversee CI/CD in VA-approved tools
• Drive ATO upkeep and security remediation
• Lead Tier II/III troubleshooting and sustainment
• Provide technical input to PI Planning
• For Senior roles, lead several teams or a sub-product line, mentor other leads and represent the product at program governance

• 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 requirements under 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, build reports and process models
• Support UAT and release validation

Explore Business Analyst at TISTA Science and Technology…. Review requirements and application details.

• Install, configure, and maintain IBM mainframe operating systems, including IBM z/OS
• Install, upgrade, and maintain ISV products using tools such as SMP/E
• Customize system parameters, libraries, and subsystems
• Apply maintenance including PTFs and APARs
• Plan and execute system IPLs
• Troubleshoot system issues, analyze dumps, and resolve software-related problems
• Support storage management processes including DASD, SMS, and DFSMS
• Maintain documentation for system configurations, procedures, and changes
• Collaborate with application teams, operations, and vendors on problem resolution and enhancements
• Participate in an on-call rotation and support after-hours maintenance windows
• Ensure system stability, performance, and security for business-critical applications running on IBM z/OS environments

• Collect and compile data from cost estimators and cost-reporting portals to update and maintain cost trackers
• Assist in preparing annual spend reports by gathering historical spend data and formatting it for trend analysis
• Support data collection for budgeting, budget forecasting, and pricing analysis for current and future contract years
• Monitor budget-versus-actual costs, identify potential discrepancies, and gather supporting documentation for senior review
• Compile and classify cost data across assigned Enterprise Agreements and platforms, including license, cloud credit, and professional service costs
• Reconcile cost data from multiple inconsistent sources, including billing portals, licensing dashboards, and financial systems, under senior guidance
• Maintain existing cost dashboards and assist in building standard reporting views using approved dashboarding and cost-reporting tools
• Track cost, schedule, and performance data for reporting to EISO Program Managers
• Input data into cost-estimating tools to support cost/benefit assessments
• Summarize data findings and draft initial reports supporting strategic recommendations made by Senior Analysts and the Program Manager

Explore Junior Business/Systems Analyst – Product Intelligence,… at TISTA Science and Technology…. Review requirements and application details.

Junior Business/Systems Analyst – Product Intelligence, Customer Procurement Support

• 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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