START Center for Cancer Research is a leading organization in Phase I oncology clinical research, dedicated to accelerating the development of new cancer therapies. With a presence across the United States and Europe, we have participated in more than 1,300 clinical trials and contributed to the development of over 40 treatments approved by the FDA and EMA.
Executive & Administrative Assistant
Location: Madrid | 6-month temporary contract | Remote/Hybrid
We are looking for a highly organized, proactive and resourceful Executive & Administrative Assistant to join our team in Madrid.
What you'll be doing
- Provide proactive administrative support to senior leadership and clinical leaders.
- Manage complex calendars, meetings and competing priorities.
- Coordinate national and international travel, including itineraries, accommodation and supporting documentation.
- Organize internal and external meetings, conferences, congresses and company events.
- Coordinate meetings and activities involving pharmaceutical companies, sponsors, investigators, hospitals and other external partners.




- Prepare and manage expense reports, corporate card expenses, invoices and related documentation.
- Support Principal Investigators/Oncologists with advisory boards, conferences, speaking engagements and other professional activities.
- Act as a key point of contact between clinics, departments, leadership and external stakeholders.
- Maintain accurate electronic files, trackers, records and administrative documentation.
- Anticipate scheduling conflicts and changing priorities, ensuring effective communication with all stakeholders.
- Handle confidential and sensitive information with a high level of professionalism and discretion.

What we're looking for
- Bachelor's degree.
- At least 3 years of relevant administrative experience.
- Previous experience supporting senior executives and working with different levels of an organization.
- Fluent English and Spanish, both written and spoke

📌 Executive & Administrative Assistant (Madrid)
🏢 The Start Center For Cancer Research
📍 Madrid