Senior Scientist, Conjugation Biochemistry

Company Description: In today’s healthcare system, disease diagnosis often relies on invasive procedures, such as biopsies, which enable direct interrogation of cellular and tissue health at the suspected source of disease. Due to their invasiveness, cost, and general inconvenience to the patient, biopsies are often conducted after onset of symptomatic disease presenting one of the largest barriers to delivering interventions early in disease progression when they are likely to be most impactful. Flagship Labs 103, Inc. is a privately held early-stage company that is building advanced technological and computational platforms to pioneer the detection of cellular dynamics from minimally invasive biospecimens that can be leveraged to connect individuals to the most effective interventions to prevent onset and progression of disease Job Description: We are seeking an experienced and motivated Senior Scientist to join and lead our conjugation efforts to drive FL103’s programs forward. Ideal candidates will be self-motivated, independent, and committed to the generation of high-quality data within a fast-paced and innovative research team. The Conjugation Biochemist will support ongoing bioconjugation projects in several research and development areas. Essential Responsibilities: * Design, synthesis, purification and analysis of oligonucleotide-conjugates on antibodies and other modalities. Develop and optimize conjugation protocols using established and novel chemistries and technologies as part of an assay development platform. * Collaborate closely with the assay development team to guide and optimize conjugates to support FL103’s programs. * Work as part of a cross-functional team to manage and maintain progress against multiple project timelines, deliver routine updates, and communicate progress to the team. * Establish and maintain excellent working relationships with critical collaborative partners throughout the company to advance discovery research activities to pre-clinical development. * Contribute to the preparation of research reports and presentations for internal project teams, leadership team, and external audiences. * Maintain updated and well-organized lab notebooks and batch records. Required Qualifications:

• Ph.D. in Biochemistry, Chemistry, or related scientific discipline
• 5+ years of bioconjugation-related industrial experience, preferably in

designing, preparing, and validating oligonucleotide conjugates. * Understanding project timelines and deliverables and plans/coordinate project work accordingly with departmental, functional, and external stakeholders. * Strong problem-solving skills and a proactive attitude towards exploring new approaches. * Demonstrates strong written and verbal communication skills, with the ability to clearly present complex scientific data to cross‑functional and senior leadership teams. * Hands-on expertise with current and cutting-edge bioconjugation techniques for antibodies, proteins, peptides, and other biomolecules. * Demonstrated hands‑on experience in analytical characterization of conjugates with a strong analytical mindset. Proficiency in purification techniques such as RP-HPLC, FPLC, SEC, and IEX. * Able to work independently or in cross-functional team settings with minimal supervision. * Adaptable and flexible, able to navigate shifting priorities and handle day‑to‑day challenges with professionalism and confidence in fast‑moving environments. * Self‑motivated with strong interpersonal, organizational, and communication skills, and able to take a hands‑on approach in a dynamic, fast‑paced, and collaborative environment. About Flagship Pioneering Flagship Pioneering is a bioplatform innovation company 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 [ Flagship Pioneering is committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or Veteran status. At Flagship, we recognize there is no perfect candidate. If you have some of the experience listed above but not all, please apply anyway. Experience comes in many forms, skills are transferable, and passion goes a long way. We are dedicated to building diverse and inclusive teams and look forward to learning more about your unique background. Recruitment & Staffing Agencies: Flagship Pioneering and its affiliated Flagship Lab companies (collectively, “FSP”) do not accept unsolicited resumes from any source other than candidates. The submission of unsolicited resumes by recruitment or staffing agencies to FSP or its employees is strictly prohibited unless contacted directly by Flagship Pioneering’s internal Talent Acquisition team. Any resume submitted by an agency in the absence of a signed agreement will automatically become the property of FSP, and FSP will not owe any referral or other fees with respect thereto. The salary range for this role is $126,000 - $181,500. Compensation for the role will depend on a number of factors, including a candidate’s qualifications, skills, competencies, and experience. FL103 currently offers healthcare coverage, annual incentive program, retirement benefits and a broad range of other benefits. Compensation and benefits information is based on FL103's good faith estimate as of the date of publication and may be modified in the future. Privacy Notice for Applicants: When you apply for a role at Flagship Pioneering or one of its portfolio companies, we collect and use personal information you provide (such as your name, contact details, work history, and application materials) to evaluate your application, communicate with you, and comply with legal obligations. Your application data is processed through Greenhouse, our applicant tracking system, and may also be reviewed using AI-assisted screening tools. We do not sell your personal information. California residents have rights under the CCPA/CPRA including to know, delete, and opt out of the sharing of their personal information. If you are located in the EU or UK, we process your data under GDPR and you have rights to access, rectify, and erase your data. To exercise your rights or for questions, contact View email address on click.appcast.io.