At Mersana, we all share a singular passion and vision: To dramatically improve the lives of people with cancer. We know that what each and every one of us does matters and that our success depends on our ability to work together. We believe we are at our best as a company when our employees are thriving and foster a culture that provides opportunities to grow and develop professionally, while also having fun. 

If you share our passion to deliver an evolutionary leap in cancer patient care and our drive to tackle difficult challenges in a dynamic and collaborative environment, then please submit your resume or CV to


Senior Scientist

Mersana is growing and has an exciting new opportunity for a Senior Scientist – Analytical Chemistry in support of Discovery functions.

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Associate Director/Director, Antibody Engineering

The Associate Director/Director of Antibody Engineering will be the leader of antibody design and optimization for use in antibody-drug conjugates (ADCs) based on Mersana’s proprietary linker-payload technology. S/he will be work closely with the project teams to define screening cascades, identify lead mAbs, evaluate clinical developability, and optimize sequences; s/he will interface with CROs when needed. S/he will be the key strategist and thought leader on new antibody formats to complement new linker-payload platforms at Mersana. S/he will foster a culture of inclusion, engagement and collaboration in the project teams, the Biology group, and the entire organization.

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Senior Associate Scientist, Pharmacology Outsourcing Lead

The Sr. Associate Scientist, Pharmacology Outsourcing Lead, reporting to the Head of Biology, will coordinate and oversee in vivo pharmacology studies for discovery-stage antibody-drug conjugates (ADCs). S/he will work closely with project teams to identify tumor models and design studies (e.g. efficacy, pharmacokinetics, and PD/biomarker), and will work closely with CROs to schedule studies, monitor progress and approve study reports.

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Senior/Principal Scientist, Biology Project Team Leader

The Senior/Principal Project Team Leader, Biology will apply rigorous scientific thought, experimentation and leadership to drive drug discovery projects and define antibody-drug conjugates (ADCs) for clinical development in oncology. S/he will foster a culture of inclusion, engagement and collaboration in the project teams, the Biology group, and the entire organization.  This position reports to the Sr. Director, Biology.

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Associate Director/Director, Business Development & Licensing

What’s in it for you?

In this role, you will have an opportunity to work closely with Mersana’s leadership and focus on the development and execution of the company’s corporate strategy.  You’ll assist in identifying strategic business opportunities including in-licensing agreements, partnerships, mergers, acquisitions, alliances and/or joint ventures, and then negotiate and review/write the agreements.  You’ll spend much of your time interacting with internal and external partners including outside counsel.  This role will have a great impact to Mersana at this extraordinary stage of the company’s development as you will also work closely with the executive team to support the IR and PR efforts. 

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Senior Scientist, Bioconjugation Development

Mersana has an exciting new opportunity to join the team as a Senior Scientist, Bioconjugation Development. The ideal candidate should have experience in developing and advancing Drug Substance projects, particularly Antibody Drug Conjugates (ADC’s), through preclinical and clinical stage development. The candidate will leverage both internal and external (Contract Manufacturing Organizations) expertise to streamline and optimize ADC process development. The individual in this position will work as a part of Mersana’s Drug Substance development team in Cambridge, MA. 

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Head, Discovery Chemistry

Leading by example, s/he will inspire with innovative scientific vision and thought-leadership, promote productive collaboration, and motivate and challenge the research organization to accomplish ambitious goals. S/he will provide thoughtful mentorship and management to a high-caliber research and development team. S/he will be accountable for leading the discovery chemistry team to execute on the pipeline programs and to bring on new discovery programs.

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Associate Director/Director, Drug Metabolism & Pharmacokinetics (DMPK)

Mersana is growing and has an exciting new opportunity for an Associate Director/Director, DMPK to join our team.

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Corporate Counsel/Associate Corporate Counsel

What’s in it for you?

In this role, you’ll have an opportunity to work across the company as you draft and execute on a variety of legal contracts for research, development, manufacturing and clinical business areas.   You’ll work in close partnership with business development to execute on licensing and other agreements, and with external counsel as you focus on corporate legal matters.  To be successful, you’ll have previously worked as an in-house counsel or external counsel in the biotech/pharma industry providing legal advice on a broad set of corporate matters and executing on a variety of contracts.  If you haven’t already had exposure to corporate governance and SEC reporting, you will have the opportunity to learn and gain this experience.  This role will be of great impact to Mersana as the company continues to mature and move forward with its therapeutic programs and ADC platform. 

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