Senior Ontologist & Systems Integration Lead

Core-CSI LLC.; Springfield (VA); On-site; USD 150,000 - 230,000; Full time

Job summary

Core-CSI LLC in Sterling, VA seeks an experienced Ontologist–Expert System Integrator to lead ontology development and systems integration across the NSG/ASG enterprise. You will oversee lifecycle planning, requirements analysis, architecture, implementation, testing, governance, and sustainment, translating mission needs into integrated capabilities.

The role requires deep expertise in ontology frameworks, MBSE concepts, and cross‑contract collaboration with government and industry partners to

Qualifications

• Bachelor's degree or higher in a STEM field, or 18+ years of relevant experience.
• 18+ years of DoD/IC acquisition, requirements, NGA production, and IC TCPED experience.
• Expert-level systems integration or systems engineering experience.
• TS/SCI clearance or ability to obtain SCI and pass a polygraph.
• Ability to work in government and multi-contractor environments.
• Strong communication, collaboration, analytical, and problem-solving skills.
• Ability to lead technical teams independently.

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 AoAs, 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.
• 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 exposing new sources and services.
• Develop and evaluate trade-space options to support planning, budgeting, and execution cycles.
• Maintain and track Agile schedules using JIRA and Confluence.
• Work independently and as a technical leader while managing priorities and deadlines.
• Collaborate across Government and multiple contractor organizations in a complex development environment.

Education

Bachelor's degree or higher in STEM

18+ years of relevant experience

Tools

JIRA

Confluence

Job description

Core-CSI LLC in Sterling, VA seeks an experienced Ontologist–Expert System Integrator to lead ontology development and systems integration across the NSG/ASG enterprise. You will oversee lifecycle planning, requirements analysis, architecture, implementation, testing, governance, and sustainment, translating mission needs into integrated capabilities.

The role requires deep expertise in ontology frameworks, MBSE concepts, and cross‑contract collaboration with government and industry partners to