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 coreandmain.com to learn more.

Job Summary

This role focuses on supporting large‑scale water, wastewater, and critical infrastructure projects specializing in treatment plants.

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.

Key Responsibilities

Project & Scope Management

• 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.

Technical Expertise & Solution Support

• 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

Quotation & Drafting Collaboration

• Partner with internal quotation, estimating and pre-bid manager teams:

  • Plant‑specific scopes

  • Detailed infrastructure material takeoffs

  • Design‑build support packages

• 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

• 4+ 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.

Environmental Job Requirements

• Typically, in a comfortable environment but with regular exposure to factors such as temperature extremes, moving machinery, loud noises, and fumes, which may cause noticeable discomfort.

• Typically requires overnight travel more than 50% of the time.

This information indicates the general nature and level of work performed by associates in this role. It is not designed to contain a comprehensive inventory of all duties, responsibilities, and qualifications required of associates assigned to this role. This description supersedes any previous or undated descriptions for this role. Management retains the right to add or change the duties of the position at any time.

We have:

• Medical with 100% preventative care coverage
• Health Savings Account
• Dental and Vison
• 401K
• Tuition Reimbursement and Tuition Grants
• Continued learning opportunities through our onsite training facility and extensive online learning catalog
• Professional development and industry networking opportunities, e.g. Our Women’s Network and community engagement events  

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.

For more information, please click here or visit https://www.eeoc.gov