Senior Medical Writer

Costello Medical; New York (NY); Hybrid; USD 90,000 - 100,000; Full time

Benefits offered by this job

Profit sharing

Hybrid working

Vacation allowance

Private medical & dental insurance

401K with employer match

Life insurance

Study leave

Job summary

Costello Medical is seeking a Senior Medical Writer for its US Medical Communications team, supporting growth in Boston and New York. You will lead projects, provide strategic client guidance and supervise teams while delivering high-quality scientific content on schedule.

The role emphasizes client communication, business development, and mentoring junior staff. A flexible, hybrid work arrangement and strong compensation accompany a comprehensive benefits package.

Qualifications

• Degree in a scientific discipline (minimum GPA 3.3)
• At least 2 years’ experience in medical communications or publications
• Strong scientific writing and ability to tailor style to audiences
• Proven project management ability and timely delivery
• Excellent written English and arithmetic
• Experience mentoring juniors and client-facing work
• Proficient in Excel, PowerPoint and Word for professional output

Responsibilities

• Lead role across medical communications projects and advise clients
• Supervise project teams and ensure high-quality scientific content
• Communicate with clients and manage project planning
• Review colleagues’ work and provide constructive feedback
• Draft proposals and contribute to business development
• Build and maintain strong client relationships

Skills

Scientific writing

Project management

Attention to detail

English proficiency

Client communication

Leadership

Mentor juniors

Data presentation

Strategic thinking

Time management

Education

Degree in a scientific discipline

Tools

Excel

PowerPoint

Word

Job description

Description

• Responsibilities: You will take a leading role across a variety of medical communication projects, working alongside a team of excellent colleagues to ensure that projects are delivered to an exceptionally high standard
• Salary: $90,000 to $100,000 per annum, depending on your qualifications and previous experience (please note that we have established salary bands that are determined by your level of educational attainment and relevant experience to ensure a fair and consistent approach for all applicants, eliminating the need for individual negotiations)
• Benefits: Discretionary profit share bonuses paid twice per year, hybrid and flexible working options, generous vacation allowance, private medical and dental insurance, 401K plan with up to a 5% employer contribution, life insurance, full funding and study leave for external training and more
• Role Type: Full-time, permanent
• Start Date: We are currently recruiting for start dates throughout 2026, and we can offer both immediate and deferred start dates. You will be asked to state your availability on your application form
• Application Deadlines: Whilst there are no set application deadlines, we strongly recommend applying as early as possible. The role will close when suitable candidates are found
• Location: This role is available in our Boston, MA and New York, NY offices
• THIS JOB IS A CURRENT VACANCY AND THE EMPLOYER INTENDS TO FILL IT BY THE END OF 2026

About The Role

Costello Medical are growing quickly through demand from both new and existing clients and are therefore looking for candidates with prior experience in medical affairs and/or publications who enjoy content delivery, as well as project and client management, to join us as Senior Medical Writers in our Medical Communications team. In this role, you will be at the forefront of our exciting expansion in the US market. This is a unique opportunity to influence and drive change in our fast-growing company, in a role you can shape to be your own, where we can offer excellent career development opportunities to high performing individuals.

Senior Medical Writers take a leading role across projects, providing strategic advice to clients, supervising the project team, and producing high-quality scientific content themselves. They ensure projects are delivered to an exceptionally high standard and in line with agreed timelines. This role involves regular client communication, project planning, reviewing colleagues’ work, providing constructive feedback, scientific writing and contributing to business development by identifying new clients, writing proposals, and building and maintaining excellent client relationships.

You will be based in our office in Boston, which was established in 2020. This presents opportunities to shape and drive our US company, whilst being supported by the success of our existing operations in the UK and Asia. You will work closely with our Boston-based Team Heads, who each have 7–10+ years of experience in the industry, as well as other senior colleagues in the US and globally.

Hybrid Working Policy

We believe that having face-to-face time in the office holds many benefits and is central to ensuring that the community we have created, where people have a workplace they belong to and feel part of, is never lost. At the same time, we recognise that homeworking can improve work life balance, reduce commuting times and costs, and provide the opportunity to juggle personal commitments. Therefore, we offer flexible working arrangements that allow our colleagues to work from home for up to half of the time, measured across a 2-week rolling period.

Why Join Costello Medical as a Senior Medical Writer?

• We are invested in our culture: We make it a priority to create an energetic, fun and supportive work environment while still delivering the highest standard of work to our clients. As a result, we achieved our B Corp certification in 2022
• Join us early in our US venture: Our US operations are relatively new and growing quickly, presenting unique opportunities for professional growth. We are onboarding multiple new hires across various roles every month, offering a dynamic and evolving work environment. This is the perfect time to join and contribute to shaping the future of our operations
• Our range of expertise: Whilst you will be primarily working on Medical Communications projects, you may also have the opportunity to work on projects for our different service offerings, including Value and Access, Rare Diseases and Evidence Development, collaborating with colleagues in a range of positions and specialisms
• The varied responsibilities: You will have the unique opportunity to continue to develop your scientific writing expertise, whilst using your communication skills to build strong and long-lasting client relationships
• Have a real-world impact: Our clients are some of the preeminent pharmaceutical and medical technology companies in the industry. We are committed as an organization to improve health outcomes globally, and you will get the chance to take a leading role in this vision

Career Profile

We offer many opportunities for personal and professional development at Costello Medical.

About Costello Medical

Costello Medical is a rapidly growing global healthcare agency specializing in medical communications, market access and health economic and outcomes research. We work with a wide range of clients, including the industry’s most successful pharmaceutical companies. We received B Corporation Accreditation in 2022.

Requirements

About You

• A degree level or higher qualification in a scientific discipline (minimum GPA 3.3). We welcome applications from candidates with a diverse range of specialisms, including but not limited to; biology, chemistry, pharmacy and medicine
• At least 2 years’ professional experience in a medical communications (medical affairs and/or publications) role outside of academia, ideally within an agency setting
• Strong scientific writing skills with the ability to tailor writing style to different audiences
• Project management skills sufficient to enable timely project delivery
• Exceptional attention to detail and high degree of written accuracy
• Excellent proficiency in written English and arithmetic
• Experience with supporting junior colleagues with their learning and development
• Excellent data presentation skills, including the ability to use Excel, PowerPoint and Word effectively and efficiently, to produce a professional, high standard of work
• Sufficient technical and strategic knowledge to provide clients with recommendations on project content and approach
• The capacity to maintain exceptional customer service and quality of deliverables under multiple competing demands
• Experience in communicating directly with clients, including responding to different communication styles, as well as a proven ability to build robust and sustainable client relationships
• The ability to motivate colleagues and take a leadership role in the delivery of project components

Benefits

What We Offer

• $90,000 to $100,000 per annum, depending on your previous experience, as well as a discretionary profit share bonus paid twice per year. Please note that we have established salary bands that ensures a fair and consistent approach for all applicants, eliminating the need for individual negotiations
• 23 days’ vacation leave increasing by 1 day each year to a maximum of 27 days. 6 public holidays plus 1 floating vacation day to use on a holiday of your choosing
• Flexible working hours and the chance to work from home for up to half of your working time
• Private medical insurance with a company contribution, as well as dental and vision cover, and life insurance
• Retirement savings via a 401k plan with up to a 5% employer match
• Paid funding for external education, and study leave
• Paid and unpaid sabbaticals based on length of service
• Regular company-funded social activities

Visa Sponsorship

We welcome applications from international candidates, but we cannot provide visa sponsorship for working visas. Therefore, you must have the right to work in the US independently from the company. However, we do consider those on a temporary visa, such as an OPT visa.

Equal Opportunity Statement

As an equal opportunity employer, we are committed to fostering a diverse and inclusive workforce and, throughout the recruitment process, there are a number of reasonable adjustments we can provide.