We are seeking a proactive Clinical Trial Assistant (CTA) to join our Operations team in Madrid, supporting international observational field studies and secondary data studies. Prior experience as a CTA in either a pharmaceutical company or a CRO environment is essential, along with fluency in English.

- To apply, please send both a CV and a cover letter in English to [email protected] quoting reference: CTA-Spain
- Interviews with shortlisted candidates will be held in October 2026.

OXON Epidemiology is a niche, late-phase international Contract Research Organisation (CRO) with Operations centred in our Madrid office, and home-based staff in Spain and the UK.

If you are looking to make an impact in a growing company and help to shape its growth, this is the place to be. By working in OXON, you can further your career in a dynamic, fast-paced, learning environment, be innovative and make an impact.

Key elements of what OXON provides:

- Close involvement with world-class science (epidemiologists and statisticians, hybrid field-database studies, and an eminent Professor of Medical Statistics, who visits Madrid monthly.)
- Deeper involvement in fewer studies rather than lots of studies.
- Ability to implement your ideas and make improvements.
- Maintain relationships by meeting F2F with your team(s) (frequency of visits to the Madrid office determined by whether you live in or away from Madrid) in a friendly, learning, fun environment.
- A horizontal company, with access to upper management.
- A passion for science and improving patient care, with medics who still see patients.

You will receive broad experience in multi-country observational studies. You will have the opportunity to stay close to the science and interact closely with epidemiologists, medics, statisticians, data managers, EDC software developers, PV, as well the Operations group, and be involved in innovative developments in observational research, such as hybrid field-database studies and pragmatic trials, with leading academics in London, Oxford, and other EU countries. This experience is provided in a supportive, learning environment that will allow you to develop more rapidly than in a narrow silo-based job.





We genuinely care about our people, and they share in our success.

The successful candidate will have the chance to work across several non-interventional field and data studies within numerous therapeutic indications. As a Clinical Trial Assistant (CTA) you will be providing operational and administrative support to clinical research teams in ensuring the most effective and efficient conduct of clinical research studies.

RESPONSIBILITIES

- Assist Project Teams and Project Managers (PMs) with the administration and coordination of clinical and epidemiological studies.
- Track critical documents and promptly inform the project management team of any outstanding items.
- Accurately update and maintain clinical systems to meet project timelines.
- Ensure all study-related activities adhere to OXON Standard Operating Procedures (SOPs) and policies.
- Support the study team in conducting site feasibility and/or country feasibility assessments.
- Prepare, distribute, file, and archive documentation throughout the study lifecycle, maintaining both electronic Trial Master Files (eTMF) and paper files.
- Perform quality control checks on the Trial Master File (TMF) and ensure its completeness and audit readiness.
- Assist Project Teams in collecting and filing critical documents required for submission to Regulatory Authorities and Ethics Committees.

REQUIREMENTS

- Bachelor’s degree or equivalent qualification in a relevant field (e.g., life sciences, clinical research, or a related discipline).
- At least 1 year of experience in a similar role, with a skill set aligned to relevant clinical trial experience or equivalent.
- Understanding of Good Clinical Practice (GCP) standards.
- Fluency in English (spoken and written).
- Strong verbal and written communication skills.




- Proficiency in MS SharePoint and other Microsoft Office products (Word, Excel, Outlook, PowerPoint, MS Project), as well as eTMF systems.
- Experience in a CRO or pharmaceutical setting.
- Excellent interpersonal and organizational skills, with the ability to collaborate effectively and manage multiple priorities within a matrix environment. Highly organized and detail oriented.
- Ability to work independently, effectively prioritize tasks, and perform activities in a timely and accurate manner.
- Proven ability to manage multiple projects simultaneously.

WE OFFER

- Full-time, permanent contract.
- Location: Madrid, Spain.
- Adaptable hybrid home and office-based working, with periodic visits to the Madrid office determined by role requirements and location.
- Flexible timetable.
- A competitive salary according to experience.
- Bonus scheme.
- Health insurance.
- Lunch vouchers.
- Opportunities for career development and training.
- An international working environment, working on international studies.

OXON EPIDEMIOLOGY is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We encourage applications from candidates of all backgrounds and do not discriminate based on race, gender, age, religion, disability, sexual orientation, or any other protected status. Join us in building a diverse and talented team!

COMPANY DESCRIPTION

OXON is a full service global scientific/operational service provider specialising in multi-country field, database, and hybrid observational studies, pragmatic trials and meta-analysis for safety, market access/HEOR and drug development. We have strong links with the prestigious London School of Hygiene & Tropical Medicine, and Oxford University, and are a preferred provider for several top-20 pharma companies. With offices in London and Madrid, OXON applies world-class epidemiological and operational experience and innovative technologies to help clients worldwide obtain high-quality (Lancet-hitting) real-world data with a passion for improving patient’s and public health.

For more information, visit www.OxonEpi.com

📌 Clinical Trial Assistant (CTA) in Spain (Madrid)
🏢 Oxon Epidemiology
📍 Madrid