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About the job

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 Contribute to the manufacturing of Fire Protection pipe fabrication to NFPA standards with a semi-automatic welder. Major Tasks, Responsibilities and Key Accountabilities

• Welds various fittings to different sizes of pipes and welding joints on a semi-automatic welder. Interprets application job sheets and various sizes of welding fittings.

  • Welds various fittings to different sizes of pipes and welding joints on a semi-automatic welder. Interprets application job sheets and various sizes of welding fittings.
  • Analyzes all welds to ensure they are free of porosity and discontinuities.
  • Ensures all welds are visibly stamped or identified with markings to designate that welds were performed by a certified welder.
  • Sorts piping per job and sorts line numbers per fabrication job.
  • Reviews the order ticket and determines the work to be performed meets the customer's specifications.
  • Verifies the final product meets quality control standards.

• Refers complex, unusual problems to supervisor.

  • Refers complex, unusual problems to supervisor.
  • Under general supervision, exercises some judgment in accordance with well-defined policies, procedures, and techniques. Work typically involves regular review of output by a senior coworker or supervisor.

• 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 or a moderate risk of accident or illness.

  • 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 or a moderate risk of accident or illness.
  • Typically requires overnight travel less than 10% of the time.
  • Requires intermittent periods during which continuous physical exertion is required, such as walking, standing, stooping, climbing, lifting, and maneuvering material or equipment, some of which may be heavy (50+ pounds) or awkward.

• Must be a minimum of 18 years of age or older

  • Must be a minimum of 18 years of age or older
  • Must pass pre-employment assessment(s) if applicable

• HS Diploma or GED, strongly preferred.

  • HS Diploma or GED, strongly preferred.
  • Specialized skills training/certification may be required.
  • Generally 2-5 years of experience in area of responsibility.
  • Experience operating, calibrating and maintaining a semi-automatic welder.
  • Certified pressure pipe welder.

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

From Core & Main's careers page (Workday), checked 13 Nov 2026.

How to apply

  1. Select Apply on coreandmain.wd1.myworkdayjobs.com. It opens Core & Main's own application form in a new tab, run on Workday.
  2. Fill in the form and upload your résumé there. Jobiwork never sees your application.
  3. Core & Main will reply to you directly. No real employer asks you for money to apply.

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