We are seeking a creative and energetic Protein Biochemist for our Monrovia location to join our molecular characterization and QC team. The successful candidate will play a key role in implementing protein characterization processes for our pre-clinical antibody variants, and assist in developing new tools for analytical characterization needs.

  • Hands-on experience characterizing recombinant antibodies/proteins using macromolecule analysis technologies (SPR, DSC/DSF, and accelerated stability studies) is a must. Experience with purification of recombinant antibodies/proteins at small to medium scale is also a must.
  • Knowledge of protein biochemistry and competence in routine protein analytical characterization tools such as HPLC, FPLC, chromatography, electrophoresis, and spectrophotometry is also required.
  • Experience with mass spectroscopy, light scattering, capillary electrophoresis and other technologies for characterization of recombinant proteins would be a strong plus.

Excellent organizational skills and ability to work well in a team are essential for this position. Creativity, enthusiasm, and strong oral and written communication skills are a bonus.

BS/MS or Ph.D. in Biochemistry or Molecular Biology, with at least two years of relevant post-graduate experience is required. A proven track record of working in a biotech environment would be a strong plus.


Xencor Inc. is an innovative biotechnology company headquartered in the Los Angeles area near Pasadena and with an office in San Diego. We recently completed a successful initial public offering (IPO). We use our pioneering XmAb® technology to develop better biotherapeutics — antibodies that target new biological mechanisms and are more potent, safer and longer lasting — to improve patient outcomes and quality of life.

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