Serif Biomedicines: LNP Formulations Co-Op

This position is open exclusively to current Northeastern University Co-Op students.

Work Period:
January 2027 to June 2027. This is a full-time, 40 hours per week position with 5 days in office.

Serif Biomedicines is a privately held, early-stage biotechnology company developing a novel approach to gene therapy that can address currently untreatable diseases. It was founded by Flagship Pioneering, an innovation enterprise that conceives, creates, resources, and grows first-in-category life sciences companies.

Serif Biomedicines was founded by Flagship Pioneering's venture creation engine that invents and builds platform companies, each with the potential for multiple products that transform human health or sustainability. Since its launch in 2000, Flagship has originated and fostered more than 100 scientific ventures, resulting in more than $90 billion in aggregate value. Many of the companies Flagship has founded have addressed humanity's most urgent challenges: vaccinating billions of people against COVID-19, curing intractable diseases, improving human health, preempting illness, and feeding the world by improving the resiliency and sustainability of agriculture.

Flagship has been recognized twice on FORTUNE's "Change the World" list, an annual ranking of companies that have made a positive social and environmental impact through activities that are part of their core business strategies, and has been twice named to Fast Company's annual list of the World's Most Innovative Companies. Learn more about Flagship at  .

Welcome to the Flagship Pioneering Co-Op Program for the cohort dreaming big and taking courageous leaps. You'll join fellow peers across our ecosystem of companies and learn firsthand how we build first-in-category companies. You'll have access to enrichment sessions , a dedicated professional development track , and a mentor that help guide you toward your next step. By the end, you will carry on a meaningful project outcome , a genuine network , and a front-row view of how Flagship pioneers new ventures that change the world.

We are seeking a highly motivated co-op student to join our Delivery team , focused on lipid nanoparticle (LNP) formulations for the delivery of nucleic acid therapeutics. The co-op will work hands-on with formulation scientists to support LNP development, preparation, and characterization. The ideal candidate works well in a fast-paced, team-oriented environment and is eager to deepen their expertise in formulation science.

• Prepare and formulate LNPs using established protocols and evolving methods
• Execute formulation experiments to support optimization and screening efforts
• Perform LNP characterization and analytics, including particle size, PDI, encapsulation efficiency, and stability testing
• Accurately document experimental procedures, results, and observations in laboratory records
• Analyze and summarize experimental data and communicate findings to project teams
• Collaborate closely with scientists across formulation, analytics, and biology functions
• Support routine laboratory operations, including reagent preparation, equipment upkeep, and inventory management

• Currently enrolled in a co-op program pursuing a BS / MS in Chemistry, Biochemistry, Pharmaceutical Sciences, Chemical Engineering, or related field
• Coursework or lab experience in nanoparticle formulation, drug delivery, or biophysical characterization
• Strong hands-on laboratory skills , attention to detail , and ability to follow experimental protocols
• Basic understanding of lipid chemistry, colloidal systems, or nucleic acid biology
• Familiarity with LNP analytical techniques (e.g. DLS, encapsulation assays, basic stability studies)
• Working knowledge of HPLC for small molecule analysis is a plus
• Ability to work effectively as part of a team in a fast-paced environment
• Good written and verbal communication skills

• Opportunity to work at the forefront of LNP formulation innovation
• Collaborative, science-driven culture with high impact research

• Build alongside founders. You'll work inside the same hypothesis-driven process Flagship uses to conceive and launch first-in-category companies.
• This can be the start of a longer story. Strong co-ops are considered for future opportunities across Flagship and its portfolio companies, not just for this one role.
• Work alongside people…