Estimator; Tulsa, OK

About Us

Irby Construction Company has been building infrastructure for the power industry for more than 75 years. Our business values and performance-driven mindset guide our actions. Our approach to work starts with safety, puts people first, seeks to innovate, and promises to perform.

Irby is proud of its inclusive work environment, family-oriented culture, excellent benefits, and clear pathways for career growth. We strive to provide every employee with clear expectations and opportunities for advancement. What’s more, Irby has long long-valued tenure. In fact, many of our executive leaders started with Irby early in their careers and in the field.

When you join our team, you join an established firm, with a culture centered around its people. Teamwork is how we work. There is no other way. Pride is ever-present inside our offices and the bond of brotherhood runs strong among our crews.

Irby Construction is a wholly-owned subsidiary of Quanta Services. That means team Irby gets the benefits of the company culture we’re known for along with the stability and resources of a Fortune 500 organization. (NYSE: PWR).

Build your career at Irby Construction.

The Estimator is responsible for assisting in the preparation of cost estimates for construction projects. This role focuses on learning estimation processes, supporting senior estimators, and ensuring the accuracy and completeness of project cost data. The Estimator I contributes to the bidding and proposal process by gathering, analyzing, and maintaining critical project information while developing foundational estimating skills.

• Assist in collecting and organizing data for cost estimates.
• Prepare preliminary and detailed estimates under supervision.
• Review project specifications, drawings, and related documents for scope and requirements.
• Maintain accurate records of estimates, revisions, and supporting documentation.
• Collaborate with project managers, engineers, and other departments to ensure accurate project information.
• Read and analyze proposal contracts, specifications, KMZ files, bills of material (BOM), submittals, and drawings.
• Identify potential risks, schedule requirements, manpower and equipment needs, and construction methods.
• Participate in preparing submittals and ensuring compliance with client requirements.
• Assist in forecasting project costs and cash flow.
• Distribute scope requests and contract information to potential subcontractors for pricing and quotations.
• Attend pre-bid meetings (virtual or in-person) as required.
• Support senior estimators and project teams with additional administrative and technical estimating tasks.

• Bachelor’s degree in Construction Management, Engineering, or related field; or equivalent work experience.
• Basic understanding of construction estimating principles and practices.
• Proficiency in Microsoft Office Suite (particularly Excel); familiarity with estimating software is a plus.
• Strong attention to detail, organization, and accuracy in documentation.
• Effective written and verbal communication skills.
• Ability to manage multiple tasks and meet deadlines in a fast-paced environment.

Preferred

• 2 years of experience in estimating, project coordination, or a related construction discipline.
• Experience reviewing drawings, proposals, and specifications.
• Exposure to T&D, utility, or infrastructure project estimating preferred.
• Pursuit of professional estimating certification (e.g., AACE, ASPE) encouraged and supported.

Physical Qualifications

• Primarily office-based with occasional travel to project sites for pre-bid meetings and site assessments.
• Ability to sit for extended periods while working on a computer.
• Occasional lifting and carrying of up to 20 pounds (e.g., project documents, laptop).
• Must be able to navigate construction sites safely when visiting field locations.
• Reasonable accommodations may be made to enable qualified individuals with disabilities to perform the essential functions.

• Comprehensive Medical Coverage – Multiple BCBS medical plan options, all with in-network preventive care covered at no cost, the same nationwide provider network, and access to…