BESS Estimator - Construction

Job Summary:

The BESS Estimator is responsible for preparing accurate, competitive, and timely cost estimates for utility-scale Battery Energy Storage System (BESS) projects. This role develops detailed civil, electrical, and balance-of-plant estimates using Trimble B2W (HeavyBid) and collaborates with engineering, procurement, and construction teams to support bid strategy, pricing, and project execution planning. 

Job Responsibilities:

Estimating & Cost Development

• Prepare detailed conceptual, budgetary, and definitive cost estimates for BESS projects. 
• Develop quantity takeoffs and pricing for civil, structural, electrical, and balance-of-plant scopes. 
• Build and maintain estimates using Trimble B2W (HeavyBid). 
• Apply historical cost data, productivity factors, and crew compositions. 
• Develop indirect costs including general conditions, mobilization, temporary facilities, and commissioning support. 

Technical & Scope Review

• Review RFPs, IFC / IFB / Initial Design drawings, SOW’s, specifications, contracts and other documents to determine full project scope. 
• Identify constructability issues, scope gaps, and commercial risks. 
• Support value engineering and alternative means and methods. 

Vendor & Subcontractor Pricing

• Solicit, evaluate, and level subcontractor and supplier bids. 
• Develop pricing for battery containers, inverters, transformers, cabling, foundations, civil work, installation labor and other work as required for project execution.  
• Coordinate with OEMs and major equipment vendors. 

Cost Risk & Contingency

• Develop project contingency based on risk profiles. 
• Identify cost drivers, escalation risks, and supply chain impacts. 
• Support sensitivity analyses and pricing scenarios. 

Preconstruction & Handover

• Participate in bid reviews, estimating closeouts, and turnover meetings. 
• Support schedule development and logistics planning. 
• Prepare estimate narratives, clarifications, and assumptions. 
• Facilitate bid turnover to the ops team upon award.  

Job Requirements:

• Bachelor’s degree in Construction Management, Engineering, or related field (or equivalent experience). 
• 5+ years of estimating experience in utility-scale renewable energy, with direct exposure to BESS projects. 
• Direct experience estimating BESS. 
• Proficiency with Trimble B2W (HeavyBid) required. 
• Strong knowledge of civil and electrical construction cost components. 
• Advanced Excel skills and experience with takeoff software. 
• Experience with EPC or design-build delivery models. 
• Familiarity with lithium-ion battery systems and major BESS OEMs. 
• Knowledge of procurement, logistics, and supply chain cost modeling. 
• Estimating certifications (ASPE, AACE) a plus. 
• PMI / PMP certifications a plus 

Work Environment/Physical Requirements:

This position is on site, often in remote or rural areas. Team members will be required to adhere to all safety requirements in all work environments. 

Specific requirements include:

• Exposure to varying weather conditions, including extreme heat, cold, rain, and wind
• Ability to lift, carry, or move up to 50 pounds
• Prolonged periods of walking, standing, bending, crouching, and climbing during onsite inspections
• Ability to wear all required personal protective equipment
• Ability to work extended hours, including evenings, weekends, and holidays, as required by business needs or project deadlines
• Travel up to 50%

Employment is contingent upon the successful completion of a background check and pre-employment drug screening, in accordance with company policy and applicable law.

TAKKION is an equal opportunity employer.