Senior Estimator (EAD) (Arlington)

About ISI Professional Services :

ISI Professional Services provides mission-critical expertise across a wide range of functional and operational areas. ISI brings over 30 years of experience providing tailored workforce and project management solutions across the U.S. we specialize in Program and Project Management, Construction Management, Real Estate Advisory, Acquisition Management, Logistics, Leadership Development, and more.

At ISI, our people are the heart of our success. We prioritize engagement, professional growth, and a strong culture to succeed together. As a Service-Disabled Veteran Owned Small Business (SDVOSB), we are proud to support Veterans by creating opportunities for them to succeed.

Join ISI and be part of a team making a meaningful impactdelivering excellence and exceeding expectations every step of the way.

We offer a comprehensive and competitive benefits package. The salary range represents a general guideline as ISI considers several factors when determining compensation to include but not limited to the candidates experience, education, skills, and market location of the position.

Position Summary :

ISI is seeking a highly skilled Senior Estimator to support cost estimation efforts for a wide range of projects at The Pentagon. This position will collaborate closely with design teams, architects, and engineers to develop cost estimates from early planning through final design.

The Senior Estimator will be responsible for preparing Rough Order of Magnitude (ROM) estimates for project planning and budgeting, as well as detailed line-item estimates for procurement and construction.

The candidate will ensure cost estimates comply with Unified Facilities Criteria (UFC), especially UFC 3-701-01, and be structured according to Construction Specifications Institute (CSI) Divisions. This role supports federal clients with project budgeting, acquisition planning, and construction programming needs.

Essential Job Functions :

• Prepare Rough Order of Magnitude (ROM) cost estimates to support early design and program budgeting.
• Develop detailed line-item cost breakdowns for construction procurement and acquisition planning.
• Collaborate with design teams, engineers, and architects to align cost estimates with evolving project scope and technical documentation.
• Apply CSI MasterFormat and UFC 3-701-01 guidance in all estimates.
• Support quantity take-offs, historical pricing analysis, and market research for material, labor, and subcontractor costs.
• Review and validate A / E estimates, ensuring consistency with program goals and design intent.
• Assist in preparing Independent Government Estimates (IGEs) for MILCON and repair / renovation projects.
• Participate in value engineering efforts and assist project managers in aligning scope to budget.
• Support the government in scope development, cost analysis, and risk identification during planning and design phases.
• Provide written summaries and cost analysis briefings to senior program and agency stakeholders.

Required Qualifications :

Preferred Qualifications :

Physical Requirements :

This job operates in a professional office environment. The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

Work Setting / Environment / Travel Requirements :

To view ISI Professional Services' Equal Employment Opportunity (EEO) statement, please visit : https : / / www.isiwdc.com / careers / eeo-policy-statement /