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.
At Costello Medical we think that the road to success is through investing in and developing our talent. Because of that philosophy, we believe that our environment is the perfect place to grow your career, and here are a few reasons why:
We offer many opportunities for personal and professional development at Costello Medical. Please click below to read firsthand accounts from our colleagues about their time with the company: https://www.costellomedical.com/careers/working-at-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. Please click here to learn more about us, our work and our mission: https://www.costellomedical.com/
Requirements
Essential requirements for the role are:
Whilst we are seeking applications from those who already have at least 2 years experience delivering projects in medical communications, we are seeking those who are flexible and willing to contribute to a wide variety of projects. You will be expected to work across different accounts spanning multiple disease areas and therefore should be able to familiarize yourself with new information quickly.
Benefits
Alongside our award-winning company culture, where every team member is celebrated, respected, and has their voice heard, our comprehensive benefits package includes:
Please click here to learn about our reward package and the other benefits of working for Costello Medical: https://www.costellomedical.com/careers/benefits-package-in-the-us/
You are required to submit your resume and a cover letter via our online application form. In your cover letter, you must explain why you think you would be suited to the role and why you would like to join Costello Medical, with examples to support both. Your resume should clearly state the dates of all qualifications and grades achieved where applicable.
Our recruitment process includes a telephone call with a member of the Talent Acquisition team, followed by a written assessment and proofreading exercise for you to complete in your own time. If successful, you will be invited to an interview which will include a short presentation that you can prepare for in advance. Our standard recruitment process lasts around 1 month, however, this is adapted if necessary.
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. Please click here to learn more.
Please note that, whilst we embrace AI to innovate and improve processes, your role may involve confidential data that cannot be uploaded to AI. Therefore, it is important for us to assess your own skills and abilities, so we recommend that you do not rely solely on this technology to generate any application materials.
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.

Costello Medical is an award-winning, independent, global healthcare agency specialising in Medical Communications and Health Economics and Outcomes Research (HEOR).
Our mission is to be a community of the very best people building trusted partnerships across the healthcare sector by delivering an exceptional service.
We provide scientific support in the analysis, interpretation, and communication of clinical and health economic data. Our capabilities include:
- Evidence Development (Statistics, Literature Reviews, Real-World Evidence)
- Value & Access (Health Economics, Market Access, Health Technology Assessment)
- Medical Communications (Medical Affairs, Publications, Creative)
- Health Policy & Public Affairs (Health Policy, Patient Engagement, Public Sector)
With teams based in the UK, US, Canada, Singapore, and Shanghai, we partner with leading pharmaceutical and MedTech companies across Europe, North America, and Asia-Pacific.
We have extensive experience across all major therapeutic areas, alongside dedicated teams focused on Rare Diseases and MedTech (medical devices, diagnostics and digital health) bringing specialist expertise to these rapidly evolving fields.
We also deliver extensive pro bono support to charities and non-profit organisations that share our commitment to improving global health.
We are proud to have achieved a 3-star accreditation with Best Companies™ for a sixth consecutive year, and were certified as a B Corporation in 2022, demonstrating our commitment to meeting the highest standards of verified social and environmental performance. In 2025, we were honoured to receive the prestigious King's Award for Enterprise in International Trade and the Agency of the Year Award at the PMi Awards.