Treatment Plant -Outside Sales Representative

Based in St. Louis, Core & Main is a leader in advancing reliable infrastructure with local service, nationwide. As a specialty distributor with a focus on water, wastewater, storm drainage and fire protection products and related services, Core & Main provides solutions to municipalities, private water companies and professional contractors across municipal, non-residential and residential end markets, nationwide. With over 370 locations across the U.S., the company provides its customers local expertise backed by a national supply chain. Core & Main's 5,700 associates are committed to helping their communities thrive with safe and reliable infrastructure. Visit to learn more.Job SummaryThis role focuses on supporting largescale water, wastewater, and critical infrastructure projects specializing in treatment plant. The Outside Sales Representative builds and maintains strong relationships with municipalities, engineers and contractors engaged in major civil and mechanical infrastructure work. This position requires significant field engagement, technical aptitude, and the ability to manage complex project scopes from pre-bid design through delivery.Requires operation of a Company Vehicle, or a Personal Vehicle and such operation is done consistently more than 20% of the average work week. If selected for this position, Core & Main will run a Motor Vehicle Record (MVR) report. A requirement of this position is an acceptable MVR report.Major Tasks, Responsibilities and Key AccountabilitiesProject & Scope ManagementManage project workloads for Treatment plant and critical infrastructure projects.Present customerprovided material lists and complete billofmaterial packages.Coordinate multistage shipments to align with construction schedules utilizing project management team.Ensure accuracy, timeliness, and execution throughout each project lifecycle.Technical Expertise & Solution SupportApply strong knowledge of water, wastewater, and civil/mechanical processes.Support customers with product recommendations, technical clarifications, and systemlevel solutions.Maintain expertise in core product categories:PVF (pipe, valves, fittings)HDPE and fusion equipmentOperators, actuators, and related plant componentsQuotation & Drafting CollaborationPartner with internal quotation, estimating and pre-bid manager teams:Plantspecific scopesDetailed infrastructure material takeoffsDesignbuild support packagesEnsure customers receive accurate, comprehensive, and timely proposals.Business Development & Market ExpansionIdentify new opportunities across the water, wastewater, and municipal ecosystems.Develop relationships with engineering firms, public agencies, and major developers.Attend industry events, associations, and trade shows to expand presence and pipeline.Conduct market research to identify growth opportunities within the region.Customer Relationship ManagementServe as the primary point of contact for plantrelated and infrastructure accounts.Maintain deep, consultative relationships that drive longterm loyalty.Act as a trusted resource for technical guidance, product sourcing, and project planning.Preferred Qualifications3+ years of industryrelated outside sales experience (waterworks, civil, mechanical, or distribution).Experience supporting large infrastructure or plant environments (water/wastewater treatment, stormwater, industrial civil projects).Strong technical aptitude: engineering background (especially civil) is a plus.Ability to read and interpret plans, specs, material lists, and engineered designs.Demonstrated ability to manage complex scopes and multiphase projects.Seeking someone with a strong determination to be a successful outside sales representative.

Created: 2026-04-04