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Site Administrator I

TMS International
Mesa, AZ Full Time
POSTED ON 11/17/2025 CLOSED ON 12/16/2025

What are the responsibilities and job description for the Site Administrator I position at TMS International?

Administrative Support

1-3 Years

Full Time

$21-$24
Job Description

TMS International is the leading provider of on-site, industrial steel mill services for steelmakers around the world. At TMS, our people, services, technology, and equipment provide invaluable resources that support and enhance our partners' entire manufacturing operations. Our services help lessen steelmakers' environmental impacts and contribute to a cleaner environment.

The secret to our success is the expertise of our people and our commitment to unrivaled service. We hire the best people for the job, equip them with what they need, and empower them to do whatever it takes to get the job done right, including making decisions on the spot to create immediate value for our partners.

Job Summary:

We are seeking a highly organized and detail-oriented Site Administrator to support our Mesa location. This role is ideal for a professional with strong administrative, human resources, payroll, and accounting skills who thrives in a fast-paced environment. The successful candidate will play a key role in ensuring smooth office operations and supporting various business functions.

Key Responsibilities

  • Perform HR and payroll duties, including data entry, verification, and tracking of vacation and attendance records.
  • Apply basic accounting knowledge to assist with financial processes.
  • Maintain confidentiality and manage access to sensitive personnel files.
  • Oversee daily office operations, including greeting guests and managing front desk activities.
  • Handle office supply procurement and issue purchase orders.
  • Enter data for Sales Orders, including rentals, slag tickets, and other assigned tasks.
  • Follow ISO 9001 procedures relevant to business operations.

Qualifications

  • 1-2 years of experience in an administrative or secretarial role within a fast-paced environment (highly preferred).
  • Proficiency in Microsoft Office Suite: Word, Excel, PowerPoint, Outlook, Teams, and SharePoint.
  • Strong interpersonal and professional communication skills.
  • Quick learner with adaptability to new software systems.
  • Exceptional organizational and time management abilities.
  • High attention to detail and accuracy.
  • Self-motivated and capable of working independently.
  • Ability to manage multiple projects simultaneously and collaboratively.
  • Discretion in handling confidential information.
  • Team-oriented, dependable, and responsible.
  • Knowledge of ISO 9001:2015 is a plus.

Benefits

  • 401(k)
  • Health, Dental, and Vision insurance
  • Paid time off

TMS International is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, disability status or other characteristics protected by law.

Job Type: Full-time


Benefits:

  • 401(k)
  • Dental insurance
  • Health insurance
  • Paid time off
  • Vision insurance

Work Location: In person

Apply Now

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Salary.com Estimation for Site Administrator I in Mesa, AZ
$43,519 to $55,016
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