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Ontologist – Expert System Integrator - TS​/SCI Clearance Required

Job in Springfield, Fairfax County, Virginia, 22161, USA
Listing for: Core-CSI LLC.
Full Time position
Listed on 2026-09-06
Job specializations:
  • IT/Tech
    IT Consultant, Systems Analyst, Systems Engineer
Salary/Wage Range or Industry Benchmark: 150000 - 230000 USD Yearly USD 150000.00 230000.00 YEAR
Job Description & How to Apply Below

CORE-CSI is a small business headquartered in Sterling, VA. We provide trusted and results-oriented expertise to the Intelligence Community, the Department of Defense, and other Federal and Commercial customers across the US. Core-CSI is seeking talented Ontologist – Expert System Integrator.

Position Overview

We are seeking an experienced Ontologist – Expert System Integrator to support the Government in leading and overseeing the integrity of the NSG/ASG systems-of-systems enterprise. This position combines expert-level systems integration, systems engineering, ontology development, and mission-focused technical leadership to enable the adoption, integration, and effective use of new sources, suppliers, products, and services. The successful candidate will provide end-to-end support across the system development life cycle, including planning, requirements analysis, architecture, implementation, testing, documentation, governance, and sustainment.

The role requires the ability to translate complex mission and customer needs into integrated products and capabilities while developing practical trade-space options that support efficient planning, programming, budgeting, and execution. This is an opportunity for a highly experienced technical professional to work across Government, industry, and multi-contractor environments while helping shape the ontology frameworks and integrated capabilities supporting Foundation GEOINT and related mission functions.

Key Responsibilities
  • Provide expert advice to the Government regarding vision, strategy, plans, needs, requirements, processes, and capability development.
  • Lead and oversee systems integration activities across the NSG/ASG systems-of-systems enterprise.
  • Conduct solution assessments, scheduling analyses, and integration activities across IPO product lines and supporting services to enable mission functions.
  • Translate mission and customer requirements into products, services, and capabilities that support optimized solutions.
  • Partner with Product Managers on backlog grooming, feature prioritization, and roadmap sequencing.
  • Plan, capture, analyze, and trace user requirements and architecture relationships throughout the system development life cycle.
  • Identify opportunities to automate or improve existing systems, workflows, processes, and capabilities.
  • Evaluate cloud service capabilities, workflows, scheduling constraints, and limitations to identify opportunities for mission and operational improvements.
  • Provide subject matter expertise in interpreting and implementing customer data requirements.
  • Collaborate effectively with IPOs, the Chief Data Officer (CDO), and other CIOT capability providers to advance Content Conveyance objectives.
  • Support Analysis of Alternatives (AoAs), Courses of Action (CoAs), trade studies, engineering assessments, and other technical decision-support activities.
  • Lead technical teams in the design, implementation, and governance of ontology processes and frameworks that guide the creation, management, evolution, and use of Foundation GEOINT in accordance with organizational requirements.
  • Provide expert-level systems integration and systems engineering support across planning, implementation, testing, documentation, and sustainment activities.
  • Assist the Government with strategic technical planning, project management, performance engineering, risk management, and interface design.
  • Provide end‑to‑end support across the system development life cycle using established processes, methodologies, and tools.
  • Develop technical approaches that shorten the timeline for adopting, integrating, and appropriately exposing new source and supplier products and services.
  • Develop and evaluate trade‑space options to support efficient planning, programming, budgeting, and execution cycles.
  • Maintain and track Agile schedules using appropriate project management and collaboration tools, such as JIRA and Confluence.
  • Work effectively both independently and as a technical leader while managing competing priorities and tight deadlines.
  • Collaborate across Government and multiple contractor organizations in a complex, multifaceted development environment.
Required…
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