OXON is seeking a proactive Clinical Trial Assistant (CTA) to join our team in Madrid. 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 quoting reference: OXON Epidemiology is a niche, late-phase international Contract Research Organisation (CRO) with Operations centred in our Madrid office, and home-based staff in the UK and USA. The successful candidate will have the chance to work across several non-interventional field and database 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. 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. 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. 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. Fluency in English, both spoken and written. Proficiency in MS SharePoint and other Microsoft Office products (Word, Excel, Outlook, PowerPoint, MS Project), as well as eTMF systems. Proven ability to manage multiple projects simultaneously. Full-time, permanent contract. Flexible hybrid office-home based (with determined visits to the Madrid office ). Health insurance. Opportunities for career development and training. OXON EPIDEMIOLOGY is an equal opportunity employer. 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.