Lab Tech Sr. - 3rd Shift

  •  Reference Number: 415902
  •  Posted: 10/26/2026
  •  Job Type: Contract

Our client, a scientific and laboratory services organization, is seeking a Lab Tech Sr. - 3rd Shift to join their team. As a Lab Tech Sr. - 3rd Shift, you will be part of the laboratory operations team supporting analytical testing workflows. The ideal candidate will have strong attention to detail, a commitment to safety, and the ability to follow written procedures consistently—skills that will align successfully in the organization.

Job Title:Lab Tech Sr. - 3rd Shift

Location:Santa Rosa, CA

Pay Range: $20-22/ hr on w2

What's the Job?

  • Read, understand, and follow written Standard Operating Procedures (SOPs) to support accurate, compliant testing.
  • Correctly identify analyzed samples and verify the accuracy of sequence for each batch.
  • Process acquired instrument data and generate appropriate reports for review.
  • Conduct the first review of GC/MS and/or LC/MS/MS analytical data by each assay SOP.
  • Transcribe or upload results to the LIS for final review and certification, while maintaining proper Chain of Custody batch documentation.

What's Needed?

  • Bachelor's degree in chemistry, analytical chemistry, or a related field.
  • At least one year of experience working in an analytical lab.
  • Ability to work safely with biological specimens, chemicals, equipment, and instruments.
  • Experience with lab documentation practices, including Chain of Custody and batch records.
  • Comfort working with analytical instruments and data review processes (GC/MS and/or LC/MS/MS preferred).

What's in it for me?

  • Work in a structured, SOP-driven analytical environment where accuracy and compliance matter.
  • Opportunity to take ownership of first-pass analytical data review and reporting.
  • Clear expectations around documentation, escalation, and maintaining a safe workplace.
  • Contribute to reliable results by ensuring sample identification, batch sequencing, and LIS entry are completed correctly.
  • Be part of a team that values prompt communication with supervisors when challenges arise.

Upon completion of waiting period consultants are eligible for:

  • Medical and Prescription Drug Plans
  • Dental Plan
  • Vision Plan
  • Health Savings Account
  • Health Flexible Spending Account
  • Dependent Care Flexible Spending Account
  • Supplemental Life Insurance
  • Short Term and Long Term Disability Insurance
  • Business Travel Insurance
  • 401(k), Plus Match
  • Weekly Pay

If this is a role that interests you and you'd like to learn more, click apply now and a recruiter will be in touch with you to discuss this great opportunity. We look forward to speaking with you!

About ManpowerGroup, Parent Company of: Manpower, Experis, Talent Solutions, and Jefferson Wells.

ManpowerGroup® (NYSE: MAN), the leading global workforce solutions company, helps organizations transform in a fast-changing world of work by sourcing, assessing, developing, and managing the talent that enables them to win. We develop innovative solutions for hundreds of thousands of organizations every year, providing them with skilled talent while finding meaningful, sustainable employment for millions of people across a wide range of industries and skills. Our expert family of brands – Manpower, Experis, Talent Solutions, and Jefferson Wells – creates substantial value for candidates and clients across more than 75 countries and territories and has done so for over 70 years. We are recognized consistently for our diversity - as a best place to work for Women, Inclusion, Equality and Disability and in 2023 ManpowerGroup was named one of the World's Most Ethical Companies for the 14th year - all confirming our position as the brand of choice for in-demand talent.

Santa Rosa, CA

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