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Administrative Assistant

Clark Testing
Jefferson, PA Full Time
POSTED ON 5/18/2026
AVAILABLE BEFORE 6/16/2026

Job Summary

Clark Testing is seeking an Administrative Assistant to support our analytical chemistry laboratory located in Jefferson Hills, PA. We’re looking for an individual capable of a variety of skills such as answering telephone calls; responding to email inquiries; copying, scanning, organizing, and filing documents; monitoring inventory; and ordering supplies used on a daily, weekly, and monthly basis. The Administrative Assistant reports to the Laboratory Manager and works closely with other departments such as Accounting, IT, and Sales.

Primary Duties

  • Respond to telephone calls and email requests in a timely and professional manner.
  • Answer the main line and provide coverage at the front desk coverage when needed.
  • Purchasing:
    • Gather supply needs from labs.
    • Obtain quotes and consolidate vendors.
    • Generate/process Purchase Orders.
  • Receipt inspection and vendor invoice processing, which includes AP system entry.
  • Invoicing:
    • Generate and process invoices from the various LIMS (Laboratory Information Management System).
  • Assist Accounting Dept. with month-end revenue balancing.
  • Enter new customers into STAR accounting system.
  • Perform other duties and tasks as needed and required by management.

Qualifications & Competency Requirements

  • High School diploma or GED is required.
  • Associate degree in accounting, business, or other related formal schooling/training is a plus.
  • Prior experience of at least 2 years in an Administrative Assistant/Office Support role is required.
  • Experience in a laboratory setting is a plus.
  • Strong and courteous verbal and written communications skills are necessary for success in this role.
  • Able to work well independently but equally as well in a team environment.
  • Superior organizational skills and attention to detail are a must.
  • Demonstrated proficiency in Microsoft Office, Word, and Excel is required.
  • Must have ability to perform several tasks concurrently with ease and professionalism.
  • Must be committed to producing quality work at all times while doing so in safe manner.
  • Available to work a Monday - Friday daylight schedule but willing to occasionally work off-shift hours or overtime when special circumstances occur and may require it.
  • Able to lift, carry, move, and transport objects of up to 40 lbs.
  • Must have reliable transportation/be able to manage the daily commute to the office.
  • Must be able to pass drug screening and background checks.
  • Must be a US citizen.

This is a full-time, hourly position. Upon successful completion of Clark Testing's introductory review period, eligibility for benefits may include medical, dental, vision, life and disability insurance, employee assistance program, 401(K) plan with discretionary employer match, paid time off, and paid holidays.

Qualified applicants should provide a resume and include salary expectations. We will only contact applicants in whom we have a strong interest. Clark Testing is an Equal Opportunity Employer.

Company Description
Clark Testing is a team of community-oriented people who help make the world safer and healthier through product testing, design validation, and material analysis. Clark operates five distinct laboratories in four states but serves customers throughout the world. We provide services that support a wide array of heavy industries – from Fortune 500 manufacturing companies to futuretech startups, government agencies on every level, university research, and non-government organizations. Come build a career with Clark Testing!

For additional information about Clark Testing, please visit www.clarktesting.com

Salary : $18 - $23

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