Treatment Plant -Outside Sales Representative - East

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.

Responsible to profitably grow sales to achieve yearly sales goals as a sales consultant for current core industries and emerging industries and markets; responsible for prospecting for new accounts, retaining existing accounts, and increasing opportunities with existing customer. This position 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.

This role focuses on supporting large‑scale 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.

• Manage project workloads for Treatment plant and critical infrastructure projects.
• Present customer‑provided material lists and complete bill‑of‑material packages.
• Coordinate multi‑stage shipments to align with construction schedules utilizing project management team.
• Ensure accuracy, timeliness, and execution throughout each project lifecycle.

• Apply strong knowledge of water, wastewater, and civil/mechanical processes.
• Support customers with product recommendations, technical clarifications, and system‑level solutions.
• Maintain expertise in core product categories:
  • PVF (pipe, valves, fittings)
  • HDPE and fusion equipment
  • Operators, actuators, and related plant components

• Partner with internal quotation, estimating and pre‑bid manager teams:
  • Plant‑specific scopes
  • Detailed infrastructure material takeoffs
  • Ensure customers receive accurate, comprehensive, and timely proposals.
  Business Development & Market Expansion
  • Identify new opportunities across 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 Management
  • Serve as the primary point of contact for plant‑related and infrastructure accounts.
  • Maintain deep, consultative relationships that drive long‑term loyalty.
  • Act as a trusted resource for technical guidance, product sourcing, and project planning.
  Preferred Qualifications
  • 3+ years of industry‑related outside sales experience (waterworks, civil, mechanical, or distribution).
  • Experience supporting large infrastructure or plant environments (water/wastewater treatment and 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 multi‑phase projects.
  • Seeking someone with a strong determination to be a successful outside sales representative.

  Core & Main is an Equal Employment Opportunity employer. Employment at Core & Main is based solely on a person's merit and qualifications directly related to professional competence. Core & Main does not discriminate against any employee or applicant on the basis of race, creed, color, religion, national origin, nationality, ancestry, age, disability, veteran status, pregnancy or related condition (including breastfeeding), affectional or sexual orientation, gender identity or expression, marital status, status with regard to public assistance, citizenship, or any other basis protected by law.

  None of the questions in this application are intended to elicit information regarding any protected characteristics, nor imply any limitation, illegal preferences or discrimination based upon non‑job‑related information or protected characteristics.

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