Construction Jr. Estimator

Company Overview

RBA Builders is a full-service General Contractor with a self-performing tenant improvement division, providing construction services across the commercial, industrial, entertainment, educational, aerospace, and medical sectors.

We are a close-knit, team-driven company that believes great projects start with great people. Our approach blends proven construction practices with new technologies, hands-on mentorship, and a collaborative culture that supports learning and career growth.

RBA Builders is founded on the values of safety, quality, honesty, and hard work, with a strong emphasis on service and long-term relationships. These beliefs are reflected in our four Core Values:

These Core Values guide how we support our employees, partners, and clients while fostering a positive and inclusive work environment.

RBA Builders LLC is located in Southern California in the city of Fountain Valley and is committed to becoming your Contractor of Choice and a place where careers are built.

RBA Builders is looking for a motivated entry level Junior Estimator to join our Preconstruction team. This is a great opportunity for someone just starting their construction career who wants to learn how projects are priced, planned, and built.

This role is ideal for a hardworking, detail-oriented person who enjoys problem solving, working with numbers, and learning how commercial buildings come together.

• Assist with quantity takeoffs from construction drawings and specifications
• Support senior estimators in assembling bid proposals and pricing packages
• Help solicit, organize, and compare subcontractor and supplier quotes
• Maintain estimating spreadsheets and documentation for bid accuracy
• Participate in bid reviews and internal preconstruction meetings
• Learn company estimating standards, workflows, and tools
• Communicate with project managers, vendors, and subcontractors as needed

• High School Diploma or equivalent
• Strong work ethic and willingness to learn
• Organized, dependable, and detail focused
• Comfortable working with numbers and basic math
• Positive attitude and ability to take coaching

• High school graduate
• Construction related classes, trade school, or drafting courses are a plus, but not required

• Any construction exposure, summer work, or hands on experience is helpful

• Basic computer skills (Excel, email, file organization)
• Ability to read drawings or learn quickly with training
• Good communication and follow through
• Strong attention to detail

• OSHA 10 or willingness to obtain is a plus

• Interest in construction management or building trades
• Experience working summer jobs in construction or similar environments
• Desire to grow into a long-term estimating or project management career

• Full time office-based position
• Occasional jobsite visits for learning and exposure
• Mentorship and hands on training provided

• Competitive salary and performance growth opportunities
• Health, dental, and vision insurance
• Paid time off and holidays
• 401(k) with company match
• Career development and mentorship within the estimating department