Executive Assistant

About the job Valvian is building the next generation of biotechnology: advanced therapies for oncology and longevity, powered by glycobiology, cellular engineering, and AI-driven discovery. From Lisbon, we are developing monoclonal antibodies, CAR-based cellular therapies, and new platforms that aim to transform how the world treats cancer and age-related diseases. In just a short time, Valvian has grown into one of the most ambitious biotech ventures emerging from Europe. With strategic partnerships, cutting-edge research collaborations, and a pipeline of breakthrough therapies, we are positioning Portugal as an international hub for biotech innovation. Our vision is bold, our timelines are fast, and our team is driven by a mission to deliver impact on a global scale. We are now expanding our operations and strengthening our leadership structure. As we prepare our new Lisbon R&D centre and scale our programs, we are searching for exceptional talent who thrives in high-performance environments and wants to be part of something truly transformative. Joining Valvian means embracing a culture of precision, ownership, scientific excellence, and relentless forward momentum. This is your opportunity to join a fast-growing biotech at one of the most exciting phases of its journey. To support this growth, we are now recruiting an Executive Assistant and Office Manager  who will ensure that both the leadership team and the office environment operate smoothly and efficiently. This role is central to the day-to-day rhythm of the company: you will manage executive priorities, coordinate logistics, and maintain an organised and professional workspace that enables the scientific and operational teams to perform at their best. This position is ideal for someone who enjoys being in a dynamic environment, handles complexity with calm and structure, and takes pride in enabling others to excel. Your responsibilities Office and Operations • Oversee the daily functioning of the Lisbon office, ensuring that supplies, equipment, meeting rooms, and common areas are always prepared and in optimal condition • Act as the point of contact for office management, maintenance, cleaning, IT vendors, and service providers • Manage mail, shipping, deliveries, and office purchases • Welcome guests, partners, investors, collaborators, and candidates, ensuring a professional and organised reception • Assist in planning and executing internal events, visits, and team gatherings • Monitor office needs proactively and resolve issues before they affect the workflow Executive Support • Manage calendars and scheduling for members of the leadership team, coordinating meetings, priorities, and time-sensitive requests • Anticipate conflicts and reorganise agendas to ensure smooth execution of daily and weekly plans • Arrange domestic and international travel, including flights, accommodation, transport, and documentation • Request briefing materials, prepare meeting packs, and ensure executives are fully equipped for each engagement • Act as a communication channel between leadership and internal/external stakeholders • Support expense management, reimbursements, and administrative reporting • Handle all information and documentation with the highest level of confidentiality What we are looking for • Availability to work onsite in Lisbon, Monday to Friday • A minimum of 3 years of experience in Executive Assistance, Office Management, or similar roles • Excellent written and spoken communication skills in Portuguese and English • Strong familiarity with Google Workspace tools (Calendar, Gmail, Meet, Drive) • A highly organised, detail-driven, and proactive working style It will be a plus if you have • Experience in consulting, banking, law, biotech, or high-growth start-ups • Prior exposure to environments that demand confidentiality, precision, and rapid task switching What we offer • A chance to join one of the most promising biotech companies in Europe at a decisive moment of expansion • A mission-oriented workplace where your role directly supports breakthrough scientific progress • Competitive compensation and room to grow professionally • A collaborative and ambitious culture that values rigor, accountability, and innovation • Flexibility when possible and access to wellbeing initiatives • The opportunity to work closely with leadership and observe how a high-impact biotech is built from the inside