Senior Estimator; Richland, MS

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 Senior Estimator is responsible for leading the estimation process for complex projects, mentoring junior estimators, and ensuring accuracy and competitiveness in bids. This role requires advanced technical knowledge, analytical ability, and strong leadership skills to support strategic project acquisition and execution.

• Review and validate estimates prepared by junior estimators.
• Develop and maintain estimation standards and procedures.
• Negotiate with vendors and subcontractors to obtain competitive pricing.
• Provide mentorship, guidance, and training to Estimator I and II team members.
• Lead the preparation of detailed cost estimates for labor, materials, equipment, and subcontractor services.
• Identify high-risk cost areas and recommend contingencies or mitigation strategies.
• Review RFPs, RFQs, drawings, and specifications to determine project scope and requirements.
• Ensure that scope requests and contract information are distributed to potential subcontractors for pricing quotes.
• Validate subcontractor and vendor pricing for accuracy and scope alignment.
• Develop bid clarifications and proposal documents for submission to clients.
• Develop detailed electrical cost estimates for data centers and other large EPC projects.
• Participate in preconstruction planning and conceptual budgeting during early project development stages.
• Create work breakdown structures and cost code alignment for estimates.
• Incorporate risk analysis and contingency planning into estimates.
• Maintain historical cost data and update estimating databases for accuracy.
• Review drawings, specifications, and design documents to identify scope and potential cost impacts.
• Perform quantity take-offs using Bluebeam and/or other digital tools.
• Manage vendor and subcontractor pricing, ensuring comprehensive and timely coverage.
• Maintain cost databases, benchmarking tools, and historical records to support pricing consistency and continuous improvement.
• Lead forecasting of cost and cash flow for projects.
• Support handoff from estimating to project management post-award, ensuring scope clarity and cost integrity.
• Collaborate closely with project managers, engineers, and trade partners to ensure estimating accuracy and alignment with project requirements.
• Lead pre-bid meetings and site walks to gather project details.
• Communicate estimate assumptions, clarifications, and requirements to internal and external stakeholders.
• Ensure estimates comply with company standards, client requirements, and regulatory guidelines.
• Maintain organized bid folders containing drawings, specifications, correspondence, and clarifications.

Education & Experience

• Bachelor’s degree in Construction Management, Engineering, or related field.
• 7+ years of experience in estimating, preferably in the utility, infrastructure, or civil construction industry.
• Expertise in estimation software and advanced Microsoft Excel skills.
• Strong leadership, negotiation, and communication abilities.
• Ability to work…