Senior Estimator; Mechanical​/Plumbing

Williams Plumbing based in Belgrade Montana is looking for a Senior Estimator to lead the development of accurate, competitive cost estimates for large and complex mechanical and plumbing projects. This role goes beyond just building estimates — you’ll help shape bid strategy, mentor team members, and ensure consistency and quality across all estimating efforts.

Williams is the Northwest’s largest plumbing contractor. From hospitals to restaurants to high‑end custom homes, we’re building Montana into the future. Our team is led by the most experienced plumbers in the industry. We have the largest apprentice program in the state. We have the manpower to take on the most exciting and ambitious projects. Plumbing is the foundation of our company and we take pride in training and retaining the best plumbers this side of the Rocky Mountains.

Located in beautiful Belgrade, Montana, outdoor adventures surround us. There’s no better place to live than Big Sky Country. Together, we build and play in Montana.

• Provide oversight and final validation of complex estimates, ensuring accuracy, completeness, and alignment across all scopes
• Lead bid strategy and risk assessment in partnership with the Estimating Manager, shaping the pricing approach for high‑value projects
• Perform deep analysis of construction documents to identify scope gaps, design risks, and cost exposures
• Direct vendor and subcontractor strategy, including leveling, negotiations, and final buyout recommendations
• Own final estimate development, including full cost modeling (labor, material, equipment, subcontractors, overhead, contingency)
• Mentor the estimating team, driving standards, consistency, and continuous process improvement

• 7+ years of estimating experience with a track record of leading large, complex mechanical/plumbing bids
• Expert‑level knowledge of HVAC, plumbing, and piping systems, including cost drivers, constructability, and installation methods
• Proven ability to own and deliver full‑scope estimates independently for high‑value, multi‑trade projects
• Advanced expertise in interpreting drawings, specs, contracts, and identifying risk gaps before bid
• Demonstrated experience in leading bid strategy, subcontractor/vendor negotiations, and final pricing decisions
• Strong leadership presence with experience mentoring estimators and influencing team standards and performance

• Competitive wage
• Comprehensive health coverage – medical insurance, dental & vision, telemedicine
• Health‑Savings‑Account sponsor: $600 per individual, $1,200 per family (HDHP HSA plan)
• 401(k) employer match up to 8% (based on company profitability)
• Company‑paid life insurance
• Voluntary accident, short‑term and long‑term disability insurance
• Paid time off, 6 paid holidays, and work‑life balance support
• Employee assistance program for mental health, financial planning, legal guidance, and more
• Williams Academy: in‑person training, 60+ online courses, and ongoing professional development
• Referral bonuses
• Pet insurance, gym memberships, dog daycare discounts, tournament events
• Live & work in Montana – enjoy the beauty and adventure of Big Sky Country

Join a team that values teamwork, individual responsibility, and commitment to success while providing support and perks to thrive.