Senior Medical Writer

Costello Medical • Boston, MA

23h • Hybrid

About The Position

Costello Medical is hiring Senior Medical Writers for its Medical Communications team, supporting the company’s growth in the US market. The role is suited to candidates with professional experience in medical affairs and/or publications who enjoy scientific content delivery as well as project and client management. Senior Medical Writers lead projects, advise clients strategically, supervise project teams, and produce high-quality scientific content, ensuring work is delivered to a high standard and within agreed timelines. The work spans multiple accounts and disease areas, and may include opportunities to collaborate on the company’s other service offerings, including Value and Access, Rare Diseases, and Evidence Development.

The position involves regular client communication, project planning, reviewing colleagues’ work and providing constructive feedback, scientific writing, and contributing to business development by identifying potential clients, preparing proposals, and maintaining client relationships. It also includes supporting junior colleagues’ development and taking a leadership role in project delivery. The role is based in Costello Medical’s Boston office, with close collaboration with Boston-based Team Heads and senior colleagues in the US and globally. The company offers hybrid arrangements, allowing colleagues to work from home for up to half of their working time, measured across a two-week rolling period.

The role is full-time and permanent, with start dates in early 2027; immediate and deferred start dates are available. The position is offered in the Boston, Massachusetts and New York, New York offices, although the description specifically states that the successful candidate will be based in the Boston office. Applicants must have independent authorization to work in the US; visa sponsorship for working visas is not available.

Requirements

• A degree-level or higher qualification in a scientific discipline, with a minimum GPA of 3.3.
• At least 2 years of professional experience in a medical communications role involving medical affairs and/or publications, outside academia; agency experience is ideal.
• Strong scientific writing skills and the ability to adapt writing style for different audiences.
• Project management skills sufficient to enable timely project delivery.
• Exceptional attention to detail and a high degree of written accuracy.
• Excellent proficiency in written English and arithmetic.
• Experience supporting junior colleagues’ learning and development.
• Excellent data presentation skills, including effective and efficient use of Excel, PowerPoint, and Word.
• Sufficient technical and strategic knowledge to advise clients on project content and approach.
• Ability to maintain exceptional customer service and quality of deliverables while managing multiple competing demands.
• Experience communicating directly with clients, responding to different communication styles, and building robust, sustainable client relationships.
• Ability to motivate colleagues and take a leadership role in project delivery.
• Flexibility and willingness to contribute to a wide variety of projects and work across multiple accounts and disease areas.
• Must have the right to work in the US independently of the employer; the company does not provide sponsorship for working visas.

Nice To Haves

• Experience in a medical communications agency setting.
• Professional background in a scientific specialism such as biology, chemistry, pharmacy, or medicine.

Responsibilities

• Lead medical communications projects and ensure delivery to a high standard and within agreed timelines.
• Provide clients with strategic advice and recommendations on project content and approach.
• Supervise project teams and take a leadership role in delivering project components.
• Produce high-quality scientific content and tailor writing to different audiences.
• Plan projects and manage competing demands to support timely delivery.
• Communicate directly with clients, respond to different communication styles, and build and maintain strong client relationships.
• Review colleagues’ work and provide constructive feedback.
• Support junior colleagues’ learning and development.
• Contribute to business development by identifying potential clients and writing proposals.
• Work across client accounts and disease areas, becoming familiar with new information quickly.
• Collaborate with colleagues across other service offerings, potentially including Value and Access, Rare Diseases, and Evidence Development.

Benefits

• Discretionary profit-share bonuses paid twice per year.
• 23 days of vacation leave, increasing by one day each year to a maximum of 27 days.
• Six public holidays and one floating vacation day.
• Flexible working hours and the option to work from home for up to half of working time.
• Private medical insurance with a company contribution.
• Dental and vision coverage.
• Life insurance.
• 401(k) plan with an employer match of up to 5%.
• Paid funding for external education and study leave.
• Paid and unpaid sabbaticals based on length of service.
• Regular company-funded social activities.
• Award-winning company culture described as supportive, inclusive, and respectful.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior