Scientist, In Vitro

Scientist - Cell-Based Assay Development (In Vitro Services)

We are seeking an experienced scientist to lead the development, optimization, and execution of cell-based assays supporting client research and testing programs. This is a scientifically rigorous, client-facing role that combines hands-on assay development with study leadership and regulatory compliance within a GLP/cGMP-regulated CRO environment.

This position is ideal for a motivated scientist with a strong cell biology or immunology background who thrives in a fast-paced, collaborative setting and is ready to take ownership of complex in vitro programs from inception through final reporting.

Key Responsibilities

• Design, develop, optimize, validate, and implement in vitro and cell-based assays to support diverse client projects across therapeutic and research programs
• Work with a broad range of cellular models, including primary cells, immortalized cell lines, and transfected or overexpressing systems
• Apply expertise across a wide range of techniques, including cell culture, transfection, gene and protein expression analysis, pathway characterization, ELISA, ELISpot, cytokine analysis, and immunological assays
• Lead studies as Study Director (GLP) or Lead Analyst (cGMP), serving as the primary scientific point of contact from project scoping and proposal development through data analysis and final report delivery
• Provide scientific, experimental, and regulatory guidance to both clients and internal cross-functional teams
• Identify opportunities to develop new testing capabilities and support the expansion of the organization"s in vitro service offerings
• Ensure full compliance with GLP/cGMP requirements, laboratory SOPs, and applicable regulatory standards
• Maintain thorough, accurate scientific documentation in accordance with good documentation practices
• Collaborate effectively across departments while maintaining clear written and verbal communication with internal and external stakeholders

Qualifications

Required:

• M.S. or Ph.D. in Biology, Cell Biology, Molecular Biology, Immunology, or a closely related field (B.S. candidates with substantial industry experience will be considered)
• Strong hands-on experience with cell culture, cellular assay development, molecular biology techniques, and immunological assays
• Demonstrated ability to work independently, manage competing priorities, and troubleshoot complex scientific challenges
• Excellent communication, documentation, and problem-solving skills
• Willingness to work flexible hours and safely handle hazardous laboratory materials as required

Preferred:

• Experience in a regulated GLP and/or cGMP laboratory environment
• BSL-2 laboratory operations experience
• Functional assay development experience (receptor activation, signaling pathways, cell viability, potency assays, etc.)
• Prior experience as a GLP Study Director or Lead Analyst in a CRO setting
• Familiarity with regulatory submissions or dossier support (IND, BLA, 510(k), etc.)

Job Type & Location

This is a Contract to Hire position based out of Hercules, CA.

Pay and Benefits

The pay range for this position is $40.86 - $48.07/hr.

Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: • Medical, dental & vision • Critical Illness, Accident, and Hospital • 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available • Life Insurance (Voluntary Life & AD&D for the employee and dependents) • Short and long-term disability • Health Spending Account (HSA) • Transportation benefits • Employee Assistance Program • Time Off/Leave (PTO, Vacation or Sick Leave)

Workplace Type

This is a fully onsite position in Hercules,CA.

Application Deadline

This position is anticipated to close on Sep 17, 2026.

About Actalent

Actalent is a global leader in engineering and sciences services and talent solutions. We help visionary companies advance their engineering and science initiatives through access to specialized experts who drive scale, innovation and speed to market. With a network of almost 20,000 consultants and 5,000 clients across the U.S., Canada, Asia and Europe, Actalent serves many of the Fortune 500. We are proud to be an Engineering News-Record (ENR) Top 500 Design Firm for our engineering design services and a ClearlyRated Best of Staffing winner for both client and talent service.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

If you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing process due to a disability, please email actalentaccommodation@actalentservices.com for other accommodation options.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.