Senior Principal Medical Writer

Work Location: Billerica, MassachusettsShift: NoDepartment: HC-RD-RO Regulatory OncologyRecruiter: Sarah EllisThis information is for internals only. Please do not share outside of the organization.Your Role:As the Senior Principal Medical Writer, you will lead the end-to-end development of complex regulatory submission documents – ensuring high communication quality, scientific rigor, regulatory compliance, and timely delivery across international markets. Acting as the primary medical writing lead within cross-functional teams, you will define document strategy, shape submission timelines, and align stakeholders across clinical, regulatory affairs, pharmacovigilance, and statistics. Beyond your individual contributions, you will mentor and develop fellow writers, champion best practices, and drive consistency and quality across deliverables. This is a role for a seasoned professional who combines deep medical writing expertise with the ability to influence decisions, lead without authority, and deliver with precision on programs that directly advance patient health.Location: Hybrid – 3x/week onsite in Billerica, MA required.Key Responsibilities:Lead medical writing efforts for global, priority programs across the full regulatory documentation suite (protocols, clinical study reports, Investigator’s Brochures, briefing books, clinical summaries, pediatric plans, authority responses, etc.).Act as Lead Writer/oversight for clinical sections of regulatory dossiers (eCTD) for global market approvals.Represent Medical Writing in cross-functional teams; participate in governance and project meetings.Define and implement document strategy, resource needs, and timelines; manage deliverables from vendors and external writers as needed.Mentor and develop writers; drive adoption of MW best practices and standards.Manage documentation strategy, quality, and consistency across indications; ensure alignment with regulatory expectations.Coordinate with cross-functional teams (clinical, pharmacovigilance, regulatory affairs, statistics) to ensure timely and compliant delivery.Who You Are:Minimum Qualifications:Bachelor’s degree in a scientific or writing discipline; Master’s or PhD preferred.5–8 years of relevant medical writing experience in pharma/biotech, with strong regulatory documentation background.Proven ability to lead multiple writers and coordinate vendor resources for regulatory submissions (IND/IMPD, bridging documents, briefing books, etc.).Solid CTD/CTD-like knowledge; experience across multiple markets is a plus.Excellent written and verbal English; strong presentation and collaboration skills.Ability to travel as needed.Preferred Qualifications:Experience with country-specific submissions and post-approval documentsProficiency with document management systems, SharePoint, and standard MW templatesFamiliarity with industry best practices and evolving regulatory guidelinesStrategic document planning and cross-functional leadershipDeep knowledge of regulatory submission requirements and lifecycle managementVendor management and remote leadershipStrong communication, negotiation, and stakeholder managementHigh attention to quality, accuracy, and compliancePay Range for this position: $126,900 – 215,400The offer range represents the anticipated low and high end of the base pay compensation for this position. The actual compensation offered will be determined by factors such as location, level of experience, education, skills, and other job-related factors. Position may be eligible for sales or performance-based bonuses. Benefits offered by the Company include health insurance, paid time off (PTO), retirement contributions, and other perquisites. For more information click here. The Company is an Equal Employment Opportunity employer. No employee or applicant for employment will be discriminated against on the basis of race, color, religion, age, sex, sexual orientation, national origin, ancestry, disability, military or veteran status, genetic information, gender identity, transgender status, marital status, or any other classification protected by applicable federal, state, or local law. This policy of Equal Employment Opportunity applies to all policies and programs relating to recruitment and hiring, promotion, compensation, benefits, discipline, termination, and all other terms and conditions of employment. Any applicant or employee who believes they have been discriminated against by the Company or anyone acting on behalf of the Company must report any concerns to their Human Resources Business Partner, Legal, or Compliance immediately. The Company will not retaliate against any individual because they made a good faith report of discrimination.