# \(StealthCo\) Scientist: Biology and Cell Pharmacology - Company: [Foresitelabs]() - Location: Boston - Team: Thalassa Bio - Posted: July 14, 2026 ## Job description **About the role:** We are seeking a highly motivated and intellectually agile Scientist to join our stealth-mode biotech company and contribute to programs focused on hematopoietic cell biology. This laboratory-based role will be responsible for designing, executing, and interpreting in vitro experiments that generate actionable insights and support scientific decision-making. The successful candidate will be mechanistically minded, able to connect experimental observations to underlying biology, build novel reproducible assays, and deliver results in a fast-paced environment. The position is a rare opportunity to play a pivotal role in the successful development of new drugs for patients within an early-stage therapeutics company backed by highly regarded investors. **Key Responsibilities:** * Lead efforts to develop a novel therapeutic for the treatment of a hematologic disease with unmet medical need * Develop, optimize, and perform cell-based assays to evaluate the impact of compounds on: + Erythroid differentiation (e.g., flow cytometry markers,morphology) + Cell health (e.g., viability) + Protein-level readouts (e.g., flow cytometry, ELISA, high content imaging, Western blot) + RNA-level outcomes (e.g., qPCR) * Culture and differentiate multiple cell lines using established and custom protocols. * Collaborate with scientists, mentor and train associates in a small biotech startup environment. * Translate and develop selected assays to support *in vivo* pharmacology studies. * Maintain detailed laboratory records, perform data analysis, and present findings in team meetings. * Ensure compliance with all lab safety, quality, and recordkeeping standards. * Oversee research activities with external research organizations (CROs) as needed **Qualifications:** * PhD in Cell Biology, Molecular Biology, or a related field with 0-2 years of industry experience preferred * BS or MS in Cell Biology, Molecular Biology, or a related field with 5+ years of relevant industry research experience will be considered * Proven tissue culture experience with human cell lines and primary human cell culture—ideally CD34+ hematopoietic or other stem/progenitor cells. Familiarity with erythroid differentiation assays and hematopoietic biology is a plus. * Molecular biology expertise including DNA and RNA purification and practical expertise with downstream nucleic acid-based (e.g., qPCR, and RNA-seq) and protein-based assays (e.g. flow cytometry, ELISA, and Western blotting) * Demonstrated experience in building novel cell-based assays is a strong plus. * Excellent attention to detail, organizational skills, and ability to work both independently and collaboratively. * Excellent problem-solving skills and a track record of learning new techniques and scientific concepts quickly. * Strong communication skills for cross-functional teamwork and clear documentation. **What we offer:** * Competitive compensation and benefits * A collaborative, small-team environment with growth opportunities * The opportunity to contribute to innovative drug discovery efforts and join an early-stage biotechnology company backed by highly regarded investors **Location:** Cambridge, MA ## Apply [Apply on Foresitelabs]() Canonical job page: