Pre-Construction Director​/Sr. Estimator - Modular Construction in Yorba Linda

Job Description Job Description

Impact Housing (IH) is a vertically integrated modular design-builder and developer headquartered in Southern California.

Our mission is to continuously evolve the world’s most sophisticated and efficient housing delivery system. We pursue this mission by reimagining every element of how multifamily projects are designed, manufactured, and built—driving down costs, shortening schedules, and expanding access to high-quality housing for the people who need it most, whether through LIHTC or unsubsidized projects.

To date this decade, the IH team has built or is actively developing close to 1,500 modular units demonstrating a scalable, repeatable path to affordability. With the capability to produce approximately 1,000 units per year today, IH is expanding to meet growing demand in San Diego, Los Angeles, and beyond.

We are now entering the next stage of our growth and strengthening every team across the company to achieve our next set of goals. We plan to manufacture and build more than 10,000 units through 2030. To accomplish this, we are implementing the Lean Standard Model company-wide; deploying AI at every level of the company; and positioning IH as a thought leader in modular development.

The foundation for our success is firmly in place. Join us as we scale our operations, transition into a higher-capacity manufacturing facility powered by smart automation and robotics, expand our production capacity by more than 3x in the Western U.S., and prepare for future growth.

The Pre-Construction Director / Sr. Estimator is responsible for leading and executing estimating and pre-construction activities for modular and multifamily construction projects from conceptual design through GMP and contract execution. This role develops and validates project budgets, evaluates cost and project risks, leads value engineering efforts, manages subcontractor and vendor pricing, and provides strategic cost guidance throughout the pre-construction process.

• Lead estimating and pre-construction activities from conceptual design through GMP, contract execution, and project handoff.
• Prepare and/or oversee conceptual, schematic, design development, GMP, and final construction estimates.
• Analyze drawings, specifications, BIM models, logistics plans, and production requirements to develop complete project budgets.
• Lead quantity takeoffs and pricing for manufacturing, transportation, crane operations, site work, and field installation.
• Develop scopes of work and bid packages for subcontractors, vendors, and suppliers.
• Solicit, evaluate, level, and negotiate subcontractor and vendor proposals.
• Review and validate estimates, assumptions, allowances, contingencies, and project scopes for accuracy and completeness.
• Lead value engineering and identify cost-saving opportunities while maintaining quality, constructability, schedule, and design intent.
• Evaluate project risks including escalation, labor availability, material pricing, logistics, procurement, and schedule impacts.
• Prepare cost analyses, cash flow projections, budget updates, and cost reports throughout design progression.
• Lead and improve estimating standards, processes, cost databases, and historical benchmarking tools.
• Coordinate closely with Development, Architecture, Engineering, Manufacturing, Procurement, and Construction teams throughout pre-construction.
• Participate in and lead owner design coordination, constructability, and executive project review meetings.
• Assist with contract negotiations, procurement strategies, subcontractor buyout, and project transition to construction.
• Provide technical guidance and mentorship to estimating and project team members.
• Support business…