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Associate System Administrator

Core & Main
United States, Missouri, St. Louis
May 01, 2026

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

Maintains and supports the integrity of the operating system environment and various computer systems.

Major Tasks, Responsibilities and Key Accountabilities

  • Performs software installation, upgrades, and maintenance.
  • Applies necessary software fixes. Monitoring systems and performance. Performs problem determination.
  • Isolates problems within the infrastructure.
  • Monitors our infrastructure, scheduled jobs, logs, and events.
  • Remediation if possible and escalation as required. Escalation includes opening of Sev1 and Sev2 events and tracking the event, root cause and prevention for recurrence.
  • Provides opportunities to execute changes for RFCs if engineers need assistance, etc.
  • Performs other duties and special projects as assigned.

Nature and Scope

  • Demonstrates skill in data analysis techniques by resolving missing/incomplete information and inconsistencies/anomalies in more complex research/data.
  • Nature of work requires increasing independence; receives guidance only on unusual, complex problems or issues. Work review typically involves periodic review of output by a supervisor and/or direct "customers" of the process.

Work Environment

  • Located in a comfortable indoor area. Any unpleasant conditions would be infrequent and not objectionable.
  • Typically requires overnight travel less than 10% of the time.
  • Most of the time is spent sitting in a comfortable position and there is frequent opportunity to move about. On rare occasions there may be a need to move or lift light articles.

Minimum Qualifications

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

Education and Experience

  • Typically requires BS/BA in a related discipline. Generally 1-3 years of experience in a related field; certification is required in some areas OR MS/MA and generally 1 year of experience in a related field. Certification is required in some areas.

Preferred Qualifications

  • 1 to 3 years of hands-on experience working in an end-user desktop support role or computer operations environment.
  • Experience with but not limited to OS, application support, system administration, job management/batch scheduling, error management/alert processing, log management review, job amends, job scheduling, research and diagnostics.
  • Ability to provide 24x7 on-call support.
  • Excellent problem solving & troubleshooting skills; self-motivator with strong written & verbal communication skills; team oriented. Experience in a technical services/operations environment, providing customer service and managing multiple tasks.
  • Ability to provide 24x7 on-call support.
  • Experience with error management and alert processing.
  • Basic network knowledge with network monitoring, maintenance and oversight skills.
  • Experience with tools like UC4, RunMyJobs, etc. for job scheduling, management and maintenance of job schedules.

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

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