What My Clients Say

I work with many CROs (Clinical Research Organisations). My corporate sector clients include medical device and pharmaceutical companies, and MedComms organisations.

Brett Thomas
Head of Sales at InTechOpen

I attended Jason’s excellent (2 x 1 hour) webinars, organised by eCPD and the Chartered Institute of Linguists. Jason provided a comprehensive overview of how to get started as a freelance medical translator with bucketloads of advice, tips and the occasional anecdote. He is an engaging presenter and spoke with clarity, wisdom and patience. I would have no compunction about recommending him for similar activities.

Nathalie Esch
Freelance Translator

I recently attended Jason’s two-part webinar on “Get a good start in medical translation”. Both sessions were really informative and interesting: Jason provided great resources for marketing, CPD, and references to use while translating medical documents. The webinars were interactive, left enough time for questions and provided a great basis for starting off/furthering a career in medical translation. I would highly recommend any further webinars offered by him.

Matthew Walker
Freelance Translator

I have found Jason’s webinars extremely informative, motivating and insightful. He has given me plenty of practical advice which I can act on now, while also establishing more long-term goals. The sessions were well-presented and there was a clear line of development over the entire course. Jason is also always more than willing to offer advice and share his wealth of experience at Translation events and conferences. I look forward to learning more from him in the future.

Jonny Cullen
Writer & Strategist

n short, I cannot recommend Jason highly enough. Recently I hired his company to translate an important business document from English into French for me. The standard of both the translation itself and the customer service provided were superb. Jason kept me fully updated before and during my project, and there is no doubt that I will be using his services again soon. 10/10.

En Ching Fung

Jason is a reliable guy and someone you can always count on ever since I have known him from Bristol. Always conscientious, always taking great pride in all that he does. Approachable guy with a can-do attitude. Keep it up, Jason!

Lidia García Pérez
Healthcare Technology Evaluation Technician

I have often used Jason’s translator or edition service for texts in English. The outcome has always been satisfactory in terms of both time and form. Specifically I hired him to translator texts about cost-effectiveness and systematic review of healthcare technologies, whereby I unreservedly recommend his services for this kind of text.

Adrianna Tryskuc
Project Manager

Very effective, fast and high-quality correction of specialised documents (EU proposals in health and engineering areas). Highly recommended.

Beatriz Sanz Baticon
Teacher, London

Thank you very much. You offer a very fast and professional service, exactly what I needed. I also have to add that the service is economical as well. I will recommend you if anybody asks me and I will hold onto your number in case I need you again.

Santiago Giménez Roldán
Former Head of Neurology, Gregorio Marañón Teaching Hospital, Madrid, Spain

Throughout my career as a clinical researcher I have been assisted by quite a few translators. Jason Willis-Lee is perhaps among the best. He knows how to capture the nuances of the written work in Spanish and turns this into top quality English. He assists with the required structure of a scientific paper and also handles himself very well with the onerous requirements of academic journals. Unbeatable.

Cristina García-Quismondo Espinosa, PMP
International Project Manager / PMP / Consultant / Project Analyst / Project Management Officer / PMO

I have requested some translations from Jason in recent years and it has always been a pleasure to work with him. He finds the way to meet the needs and requirements, delivers according to the expected dates and is available for any correction or suggestion. I completely recommend him as a professional.

Yolanda Ramallo
Biostatistician and Economist

I have entrusted various assignments to Jason to translate scientific papers into English. He performed good work, was very professional and delivered on time. At Funcanis we continue to count on him for future jobs.

Vicky Tzivi

I found all the webinars I attended (Blood Tests, Diabetes and Cancer) very interesting.  They were clear, concise and to the point. They covered many aspects and provided us with basic information related to diabetology, oncology and blood tests. Attending the afore-mentioned webinars has made me more confident when tackling the translation of texts related to haematology, diabetes and cancer and enhanced my translation value in the specific fields. Moreover, the recommended reading together with the resources offered have proved to be invaluable. I would definitely attend more webinars delivered by Jason Willis-Lee.

Ylva Norberg
Supplier Relations Manager at LanguageWire

When I was working as Supplier Relations Manager at LanguageWire, I cooperated with Jason.  The project managers and our clients were satisfied with Jason’s quality work and great expertise. On top of that, Jason was always service-minded and friendly. 

Kelly Grille Croft
Senior Client Services Manager at Novartis

When I was working as Project Manager in Clover SGM, I cooperated with Jason in various projects.  Our clients were satisfied with Jason’s quality of work and great expertise. He was also very fast in delivering any petitions.

Arancha Caballero
Director of Nuadda

We have been working with Jason for a number of years now as he is one of our key copyeditor for journal articles. Previously I have had the pleasure of working with him in the Programme Committee of Elia Together when he volunteered his time for the translation industry community.

Martin Daniel Guterman
Insurance Company Policy Manager-Auditor Physician

My wife and I needed certified translation for the GMC´s recognition of our medical degrees.  For that reason we contacted Jason Willis-Lee.  His translation was fast and accurate and accepted by the GMC without any problems.  I strongly recommend his services!



Karolina Karczmarek-Giel
Business Operations Manager eCPD webinars

Jason knows a lot about medicine, translation, and business. This intersection of skills makes him a wonderful translator and trainer. I have worked with him on several projects and can attest to his professional attitude and kindness of character. If you need a medical translator or you’d like to learn about medical translation, he’s your person!

Andrew Leigh
Experienced legal translator

I’ve been working with Jason for the past four years after meeting at the ITI Conference in Newcastle.  We have supported each other over that time and formed a partnership (Medico-Legal Translations) for those texts that cover our respective specialist areas. Jason is knowledgeable, committed and reliable both in his translation work in the medical field and in the regular training webinars that he delivers. If you’re looking for an expert medical translator, I can wholeheartedly recommend him.

Carlos Sauco López de Sancho
Financial Analyst, Equipo Economico Management Consultancy

Jason has supported me by taking on responsibility for translating financial reports, sectoral notes and financial presentations for clients. Over these past few years, Jason has proved himself to be an extraordinary professional, showing attention to detail and full availability. I would recommend Jason for any job that requires an excellent review and translation of texts from Spanish to English .

Andrew Morris
Owner of Morris Traduction and popular Facebook page Standing Out

Jason is a fluent and highly plausible writer, who intuitively understands the flow of a narrative and the structure of a piece, keeping his reader engaged, and often amused or intrigued, to the very end.

Steven Kerr
International Business Development Consultant specialised in Crossborder Reproductive Care

I had the pleasure of collaborating with Jason recently on a fairly large medical/legal translation project. I found him to be professional, on point and on budget. He met the deadline with ease and I would thoroughly recommend his services. I expect to be working with him in the future.

José Antonio Martínez
Neonatologist. Department of Paediatrics, Hospital Universitario Puerta de Hierro

Our group has used Jason WillisLee’s scientific text editing and proofreading services on several occasions. Jason’s work is excellent: professional and fast, he does not just limit himself to merely correcting the grammar, he also offers valuable suggestions on the scientific syntax and structure of the text. To date, his work has saved us the annoying comments from revisers on the quality of the English of our texts. Furthermore, the prices that Jason offers are highly competitive, especially when compared to the service of some publishers. Highly recommendable.

Lucía Campestrin Steele
Operations and Development Manager at Wichtig International Ltd

Jason has collaborated with our Wichtig publishing for several years and across several disciplines in the biomedical field. He has always proved a highly skilled and reliable colleague, constantly contributing to the improvement of articles published in our journal portfolio. He is very friendly and a great pleasure to work with.

Luciane Gorzkowski
Project Manager, ICON

I’m always impressed with the high quality work that Jason presents. His work is detailed, precise and demonstrates his deep knowledge. He is also very pleasant to work with and I recommend him to any employer related to the Translation/Proofreading Industry. Very reliable and willing to take projects, even the more complex and lengthy ones. He makes my job easier!!!

Caroline Wertenberg
Project Manager, ICON

I’ve worked with Jason on multiple projects for almost 3 years now. He is very responsive, professional, wellorganized, time conscious and reliable. I would definitely recommend his services and look forward to working with him on future projects.

Ekaterina Glass
Project Manager at Lazar Translating & Interpreting

Jason has been doing medical translations for Lazar & Associates from French/Spanish into English for about 2 years. He is very professional and reliable. The quality of his translations is always great. I have always been happy with his work. I would definitely recommend him to other companies.

Louise Bellamy
Translations Manager, Synovate Healthcare

I have worked with Jason for over 3 years and have always found his work to be of an extremely high quality. He is extremely reliable and conscientious, always punctual and very pleasant to work with. I would not hesitate to recommend him.

Karen Briddon
Project Manager, Synovate Healthcare

Whilst at Synovate Healthcare I commissioned Jason to translate open ended responses to online questionnaires about pharmaceutical research on a very regular basis. He is an excellent Spanish and French into English translator with excellent knowledge of medicine and pharmaceuticals. I always admired Jason’s professional attitude and commitment to doing a great job on time every time. I would definitely recommend his services and hope to work with him again in future.

Salomé López Lavado
Head of Vendor Management, CLS Communication

Reliable and easy to work with.

Luke Sewell
Client Service Director, LatinLink.com

Professional and amicable. Will be collaborating again.

Martin Márquez
Assistant Translations Manager, Synovate Healthcare

Jason consistently delivers high quality translations in a timely manner and I would not hesitate to recommend his services to colleagues and business partners.

Agad Traductions/Agatrad

Very professional and serious Translator. We have always been pleased with the good quality of the Translations and the presentation.

Tea Dietterirch
2M Language Services

Jason delivered a quality translation on time. We look forward to working with him again.

Translation Agency

Excellent translator. Very professional and kind person to work with. Very good quality translations are always delivered on time.

Paul Maggs

I used Jason for a technical medical translation in 2015. Jason was very professional and produced the required documents and certifications in a couple of days. I can recommend Jason for any medical translations from Spanish to English.

Paloma López de la Osa Escribano
Editor at CTO Editorial

Jason Willis-Lee is an effective and serious worker. He is flexible and adapts to the working needs. It has been great to discover him!