Career Opportunities

Career Opportunities


Patients are at the heart of everything we do at Loxo Oncology, and we continue to be motivated by our goal of improving the lives of people living with cancer. We pursue this goal with a tenacity, focus, and commitment to excellence that defines who we are and how we work.

We seek dedicated, passionate, hardworking, intelligent, thoughtful, and authentic individuals who thrive within a collaborative and fast-paced environment and will bring their experiences, unique perspectives and problem-solving skills to the team. In return, we cultivate an environment that rewards and recognizes hard work and provides opportunities for learning and growth as part of a team making a meaningful difference in the lives of patients.

Principal/Senior Principal Scientist, Toxicology

Location: Boulder, CO

Reports To:

Director, Toxicology

Position Summary

Loxo Oncology at Lilly conducts discovery research, clinical development and regulatory affairs for oncology, with the goal of creating a pipeline of therapies that have the potential to make a meaningful difference for patients. Loxo Oncology at Lilly was created in December 2019, combining the Lilly Research Laboratories oncology organization and Loxo Oncology, which was acquired by Lilly in early 2019. The unit has team members in Boulder, CO, Indianapolis, IN, New York City, South San Francisco, Stamford, CT, and Madrid, Spain.

The Toxicologist will be responsible for the planning, execution, and monitoring of DMPK and toxicology studies for advancing candidates through early target assay development, lead optimization, candidate selection and into IND-enabling studies and beyond.

Roles and Responsibilities of the Position*
  • Evaluate new targets for potential toxicological liabilities.
  • Create novel experimental designs for mechanistic toxicology studies, including DMPK considerations, designed to assess hypotheses for and evaluate mechanisms of toxicity related to physiological or biochemical functions.
  • Support predictive toxicology experimental efforts within Discovery (e.g., in vitro cell-culture based, animal models of disease) analyze safety-related data and use it to make decisions.
  • Develop early safety assessment and ensure appropriate toxicology studies and liability screens are performed to support nomination of drug candidates for further development.
  • Communicate results clearly and concisely in both oral and written reports and presentations.
  • Perform in depth pathway/network analysis on data derived from toxicology and other studies and disseminate results to the wider toxicology community (internally and externally).
  • Closely interact with scientists in other functional areas.
Required Qualifications and Background
  • Ph.D. in toxicology required, along with 10+ years’ experience as a toxicologist within the biopharmaceutical industry. Board certification in Toxicology strongly preferred.
  • Previous small molecule oncology therapeutic product development experience in a pharmaceutical or biotechnology company is preferred.
  • Familiarity with GLP regulations and regulatory guidelines for the testing of biopharmaceutical products and experience with compilation of toxicology information into various regulatory submission documents is desirable. 
  • Demonstrated ability to work well with other accomplished professionals within and across functions/teams. Willing collaborator.
  • Strong written and oral communication skills.
  • Ability to multi-task and shift priorities rapidly to meet tight deadlines.
  • Excellent written and verbal communicator.
  • Detail oriented and well organized.
  • Good and thoughtful listener.
  • Enthusiastic, self-motivated and keen to improve processes and overcome inefficiencies.
  • Proficient in Microsoft Office suite and applications.
Physical Demands / Travel

The physical demands of this position are consistent with working in an office / laboratory/ environment. Some light lifting, and maneuvering may be required.

The physical demands here are representative of those that must be met by an employee to successfully perform the essential functions of this job.

Work Environment

This position’s work environment is in an office and lab with some remote responsibilities.

The work environment characteristics described here are representative of those encountered by an employee while performing the essential functions of this job.

*To perform this job successfully, an individual must be able to perform each role and responsibility satisfactorily. The requirements listed above are representative of the knowledge, skill, and/or ability required. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

Loxo Oncology, Inc. is an EEO/Affirmative Action Employer and does not discriminate on the basis of age, race, color, religion, gender, sexual orientation, gender identity, gender expression, national origin, protected veteran status, disability or any other legally protected status.

For more information about Loxo Oncology’s privacy practice, please view the Privacy Statement.