Ascension LLC is seeking a high-performing Senior Cost Estimator to lead the development of complex cost estimates supporting federal programs. This role is critical to ensuring the Government receives accurate, defensible, and data-driven cost analyses that inform acquisition strategy, budgeting, and program decision-making.

The ideal candidate is a technical leader in cost estimating and analysis, capable of building parametric models (including SEER-based models), validating cost methodologies, and advising senior stakeholders. This individual will serve as a trusted advisor, ensuring cost realism, transparency, and alignment with federal standards and best practices.

This role is essential to mission success, as it directly impacts program affordability, acquisition planning, and lifecycle cost management.

Position Summary

The Senior Cost Estimator will lead the end-to-end development of cost estimates, including parametric modeling, cost methodology design, and validation of assumptions. The role requires deep expertise in federal cost estimating frameworks, including the use of tools such as SEER, and the ability to translate technical and programmatic inputs into structured, defendable cost models.

The ideal candidate is:

• Detail-oriented and analytically rigorous
• Self-driven and capable of operating in ambiguous environments
• Skilled at anticipating risks and developing mitigation strategies
• Able to communicate complex cost data clearly to technical and non-technical stakeholders

The position supports cost estimating, model development, and validation activities, ensuring outputs meet federal standards for accuracy, traceability, and audit readiness.

Day-to-Day Responsibilities

• Lead development of comprehensive lifecycle cost estimates for federal programs
• Build and maintain parametric cost models (e.g., SEER, Excel-based models)
• Validate cost estimating methodologies, assumptions, and data inputs
• Conduct cost analysis, sensitivity analysis, and risk assessments
• Develop cost breakdown structures (CBS) and align with WBS frameworks
• Prepare and deliver cost reports, briefings, and technical documentation
• Collaborate with program managers, engineers, and analysts to gather inputs
• Perform independent cost estimates (ICE) and cross-check contractor proposals
• Support model calibration, benchmarking, and historical data analysis
• Ensure compliance with federal cost estimating guidance (GAO, DoD, OMB, etc.)
• Provide technical oversight and mentorship to junior cost analysts
• Support audits, reviews, and validation activities for cost estimates