Research Associate (I, II, Sr.)/Associate Scientist: Biomarker and Bioanalysis

Posted 2 weeks ago

Arcellx ( is a venture-backed, clinical-stage biotech company focused on the development of novel cell-based cancer therapies.  The company is in Gaithersburg, Maryland and has assembled a team of biotechnology professionals with expertise in biologics discovery, characterization, and development.  Lead products will incorporate proprietary technologies that enhance tumor-specific killing by genetically engineered human immune cells.

Primary Objective

The Sr. Research Associate/Associate Scientist is open to highly motivated candidates interested in working in a fast-paced biotechnology company. The incumbent will be part of the Biomarker and Bioanalysis group within Translational Sciences which is responsible for establishing strategies and methods to assess Arcellx’s drug candidates as they transition from preclinical to clinical development. The successful candidate’s primary responsibility will be assay development, qualification, and validation immunological based assays (Flow cytometry and immunoassays) designed to characterize CAR-T and tumor cells from preclinical and clinical studies. Additional responsibilities will include cross-training and support for PK/ADA assays as well as exploratory PD endpoints including genomic analysis.


The main responsibilities will include but are not limited to:

  • Perform immunoassays (ELISA, MSD) and flow cytometry assays to support clinical trials.
  • Generate and characterize critical reagents and controls for use in assay development, qualification, and validation.
  • Perform assay development, qualification, and validation per ICH Q2 guidelines
  • Responsible for planning, designing, executing, troubleshooting, recording, and analyzing experiments.
  • Maintain laboratory records, summarize, and present data in group meetings and contribute to group discussions.
  • Maintain a clean and safe laboratory environment.
  • Participate in management of laboratory equipment and supplies.
  • Other duties and responsibilities as assigned.

Preferred Qualifications:

  • Degree in life sciences (e.g., Biology, Cell biology, Immunology), BS, MS, PhD degree with a minimum of 2 years relevant experience PhD (job level to be adjusted based on amount of prior experience).
  • Experience performing immunological based assays such as flow cytometry and immunoassays (ELISA, MSD)



  • Commitment to ethical scientific investigations and rigorous experimental methods.
  • Ability and desire to multitask and function in a fast-paced entrepreneurial environment.
  • Excellent organizational, communication skills, and attention to details
  • Sense of urgency in performance of duties.
  • Interpersonal skills that promote a collaborative and productive lab environment.
  • Effective and efficient written and oral communication skills.


Submit cover letter and resume to:

Without exception, applicants must submit both a cover letter and resume to be considered for these positions and must have experience in one of the fields listed above.


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