Lab, Clinical Research Laboratory Technologist (PHX)

Castle Biosciences • Phoenix, AZ

6d • Onsite

About The Position

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.
Why Castle Biosciences?
Exceptional Benefits Package:
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
A DAY IN THE LIFE OF A Clinical Research Laboratory Technologist
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.

Requirements

• 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 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
• 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.
• 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.

Nice To Haves

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

Responsibilities

• preparing and processing patient samples
• operating laboratory instruments
• executing assays in strict accordance with approved SOPs and study plans
• work closely with Clinical Research Scientists to support ongoing studies, follow experimental designs, and resolve technical issues to ensure accurate and timely testing
• maintaining sample tracking and workflows in LIMS
• performing routine quality control and equipment maintenance
• documenting results in compliance with quality and regulatory requirements
• 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

Benefits

• Excellent Benefits with Castle paying approximately 94% of medical insurance premium
• Company HSA contribution
• 30 paid days off a year (includes 10 holidays)
• 6%-401K match with no vesting schedule
• 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

What This Job Offers

• Job Type: Full-time
• Career Level: Entry Level
• Number of Employees: 501-1,000 employees