Clinical Research Laboratory Technologist; PHX

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Castle Biosciences Inc. is growing, and we are looking to hire a full-time Clinical Research Laboratory Technologist working from our Phoenix, AZ office location, with a start date on or before February 27, 2026.

• Excellent Annual Salary + 20% Bonus Potential
• 20 Accrued PTO Days Annually + 10 Paid Holidays
• 401K with 100% Company Match up to 6%
• 3 Health Care Plan Options + Company HSA Contribution
• Company Stock Grant Upon Hire

This role is a hands‑on bench position focused on supporting clinical research studies. Responsibilities include preparing and processing patient samples, operating laboratory instruments, and executing assays in strict accordance with approved SOPs and study plans. You will work closely with Clinical Research Scientists to support ongoing studies, follow experimental designs, and resolve technical issues to ensure accurate and timely testing. Daily tasks also include maintaining sample tracking and workflows in LIMS, performing routine quality control and equipment maintenance, and documenting results in compliance with quality and regulatory requirements.

Depending on study needs, you may perform molecular techniques such as RNA/DNA extraction or PCR‑based assays and support assay development, validation, and data review in a collaborative research laboratory environment.

• Bachelor of Science Degree in Chemistry, Biology, Clinical Laboratory Science, or Medical Technology from an accredited institution, plus 1–2 years of experience in a clinical or research laboratory environment. And/or have completion of military training for laboratory technicians as high complexity testing. Completion of a 50-week U.S. military medical laboratory training program.
• Minimum coursework and training requirements:
  • 24 semester hours of medical laboratory technology courses or 24 semester hours of science courses, including 6 semester hours of both Chemistry & Biology & an additional 12 semester hours in any combination of Chemistry, Biology, or Medical Laboratory
  • AND Completion of a clinical laboratory training program OR at least 3 months of documented laboratory training in each specialty area where the individual will perform high‑complexity
• Technical proficiency, scientific creativity, successful collaboration with others, and independent
• The Clinical Research Technologist in the clinical research laboratory can be placed on a track towards obtaining American Society of Clinical Pathology (ASCP) Technologist in Molecular Biology (MB) board certification if not already credentialed upon hire and expected to obtain such a certification within 2 years of employment. (Only applicable to PHX)

• 2-4 years clinical laboratory experience or 2-4 years of clinical research experience preferred.

Please see the full job description at the end of the job ad.

• Monday - Friday, 8:30 pm to 5:00 pm, exempt position, working from our Phoenix, AZ laboratory.

We truly appreciate your time. If this feels like the right opportunity for you, we'd love for you to complete our mobile‑friendly application. We're excited to learn more about you and look forward to connecting soon!

All candidates must be legally authorized to work in the United States. Currently, Castle Biosciences does not sponsor H‑1B visas, OPT, or employment‑related visas.

At Castle, it all comes down to people. After all, disease doesn't just happen - it happens to people. We believe that disease management and treatment decisions can be better informed through a person's unique biology, which is revealed through the scientific rigor of our innovative, laboratory‑developed tests. We are committed to empowering healthcare providers and patients with the goal of improved outcomes.

Every employee at Castle has an impact on patient care, and we work to ensure that everyone finds their work to be both challenging and rewarding
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