Research Associate – Bioanalytical Development (Contract)

Bioanalytical Development · Monrovia, California
Department Bioanalytical Development
Employment Type Contractor
Minimum Experience Entry-level

Xencor is an innovative, clinical-stage biopharmaceutical company located in the Los Angeles area—near Pasadena—and in San Diego. We use our pioneering XmAb® technology to discover and develop better biotherapeutics, antibodies and cytokines with improved function, with the goal of improving patient outcomes and quality of life. We have an excellent opportunity for a Contract Research Associate – Bioanalytical Development to join our team.


Our protein engineering capabilities and the modular nature of our XmAb technology allow us to quickly identify and create new platforms and drug candidates for potential development. We are advancing a deep clinical pipeline of novel drug candidates, including eight bispecific antibodies and two engineered cytokines, and more programs are expected to start clinical testing in 2022. We also leverage our many XmAb technologies by collaborating with leading global biopharmaceutical companies, including Genentech and Janssen Biotech, among others, and including our partnerships, 20 XmAb drug candidates are advancing through clinical development. Three XmAb medicines, to treat patients with a range of serious illnesses, such as aggressive lymphoma, rare blood disorders and COVID-19, are now marketed worldwide by partners.


Our employees are the most important factor in our success, and we have assembled a highly talented group from diverse backgrounds and disciplines to execute our business plan and shape our future. Xencor employees’ value new ideas and flexibility and demand from each other scientific rigor, a passion for innovation, and a willingness to take risks.


We currently have an excellent opportunity for a talented Research Associate – Bioanalytical Development to join our team!  


The research associate will be part of the team that is responsible for ligand binding assay (LBA) development and optimization and performing sample analysis to support preclinical and clinical product development. The incumbent is expected to participate in the development of analytical methods to support the testing of samples for pharmacokinetic, immunogenicity, and potency testing.


Job Duties Include:

  • Use quantitative bioanalytical techniques to analyze samples following written protocols.
  • Perform peer review of data and documentation generated by other Analysts, as needed
  • Assist in the development, optimization, and pre-qualification of bioanalytical methods
  • Participate in the maintenance of laboratory equipment.
  • Characterization such as functionality (e.g., binding activity), concentration, stability of protein reagents (antigens & antibodies)
  • Other responsibilities as assigned by direct supervisor


Job Qualifications:

  • Minimum of a bachelor’s degree in Biology, Biochemistry, Chemistry, or a related field is required.
  • At least 3 years of related experience. Biotech or CRO industry experience preferred. 
  • Experience in Immunoassays (e.g., ELISA, MSD, TRF)
  • Experience in cell-based or ligand binding assay development to support potency testing is a plus.
  • Experience in design, development, and execution of analytical methods
  • Proficient in common software and data analysis packages (e.g., PowerPoint, Excel, Word, Outlook, SoftMax Pro, GraphPad Prism, JMP)
  • Knowledge and/or training in regulated labs is a plus
  • Detail-oriented, good documentation practice, and strong organizational skills
  • Strong interpersonal skills and ability to work well in a team
  • Excellent verbal and written communication skills

Physical, Mental and Environment Demands:

The physical, mental and working environment demands described are representative of those that must be met by an employee to successfully perform the primary functions of this position.


The working environment for this role includes working in a research laboratory which may involve running experiments and operating laboratory scale process equipment for sample and data generation.  Occasionally, repetitive tasks, prolonged standing, and the use of PPE for handling hazardous and biohazardous materials may be required.  See additional requirements for laboratory and research related jobs listed below.


The physical demands of the office are normally associated with extended amounts of time sitting and using office equipment, including a computer, keyboard and mouse, which can cause muscle strain. While performing the duties of this job, the employee is frequently required to stand, walk and sit. Periodic light lifting of supplies and materials may apply.


Specific mental demands for the position are listed above under requirements.  In addition, mental demands for this position include:

  • Ability to multitask without loss of efficiency or accuracy, including the ability to perform multiple duties from multiple sources.
  • Ability to work and sustain attention with distractions and/or interruptions.
  • Ability to interact appropriately with a variety of individuals including vendors, customers and clients.
  • Ability to maintain regular attendance and be punctual.
  • Ability to understand, remember and follow verbal and written instructions.

Additional Requirements for Laboratory and Research Related Jobs

This role may involve work with experimental subjects and/or specimens including infected samples, plus various Hazardous Materials and infectious agents (Bloodborne Pathogens, or other potentially infections materials (OPIMs). Therefore, the following are also required:

  • Ability to follow the established Environmental Health & Safety rules, procedures, and/or BioSafety Guidelines
  • Ability to read and understand Safety Data Sheets (SDSs)
  • Ability to be available and willing to work some weekends and evenings to conduct and complete experiments
  • Knowledge of biosafety techniques and aseptic/gowning practices
  • Experience with laboratory safety standards and procedures, including biohazard handling and disposal techniques, and the ability to ensure laboratory compliance with required safety regulations
  • Experience working with biological and chemical hazards, infectious agents, bloodborne pathogens and animal allergens
  • Experience working in and maintaining a sterile environment
  • Experience working with chemical, and biological hazards 
  • Thorough knowledge of the operation and maintenance of various lab equipment such as microscopes, centrifuges, spectrophotometers, balances, pH meters, and electrophoresis equipment, freezers, and incubators.

Occasional travel may be required, including travel between Xencor’s Monrovia and San Diego offices. Work for this position is generally performed at Xencor’s worksite and requires full-time commitment.


Xencor requires all employees to be fully vaccinated against COVID-19 as a condition of employment.  Being fully vaccinated means that at least two weeks have passed since an individual’s final dose of an authorized COVID-19 vaccine regimen, including any boosters recommended by the CDC.  New employees will be required to provide proof of their fully COVID-19 vaccinated status as of their start date unless an exemption or accommodation is approved. 

Americans with Disabilities Act (ADA) Statement

The Company will provide reasonable accommodations (such as a qualified sign language interpreter or other personal assistance) with the application process upon your request as required to comply with applicable laws. If you have a disability and require assistance in this application process, please contact


To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. Reasonable Accommodations may be made to enable qualified individuals with disabilities to perform the essential functions.


Equal Employment Opportunity (EEO) Statement

The Company is an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to age, race, color, religion, sex, sexual orientation, gender or gender identity, national origin, disability status, protected veteran status or any other characteristic protected by state or federal law.


Xencor does not accept profiles or resumes from recruiting vendors without a binding written agreement. Any unsolicited submission of services and or resumes in no way creates an obligation or duty by Xencor, implied or otherwise.



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  • Location
    Monrovia, California
  • Department
    Bioanalytical Development
  • Employment Type
  • Minimum Experience