We are looking for a Senior Internal Auditor (m/f/d) to join our team at SIXT. In this role, you will independently plan, execute, and report on risk-based audits across a variety of business areas. A key focus will be supporting company-wide AI and digitalisation initiatives through both audit and advisory activities, while also leveraging modern AI tools to enhance the efficiency and quality of audit processes.

You will evaluate internal controls, assess emerging risks (including those related to AI), and collaborate closely with internal and external stakeholders to ensure strong governance and compliance. Additionally, you will help shape the audit function’s AI strategy, drive innovation in audit methodologies, and contribute to the development of the team. If you are analytical, forward-thinking, and curious about how AI can transform audit practices, join Team Orange!

YOUR ROLE AT SIXT

• You plan and execute risk-based audits across operational, financial, IT, and compliance areas
• You evaluate the effectiveness of the internal control system (ICS) and adapt audit approaches to evolving risks
• You coordinate audit activities with internal and external stakeholders to ensure alignment and efficiency
• You audit AI systems and assess risks such as model risk, data bias, and regulatory compliance (e.g. EU AI Act)
• You leverage AI-powered tools to enhance audit quality and actively shape the audit function’s AI strategy
• You prepare reports, present findings to senior stakeholders, and track the implementation of agreed actions

YOUR SKILLS MATTER

• Experience You have a relevant degree and 4–6 years of experience in internal audit, external audit, or a comparable field
• Audit Expertise You possess strong knowledge of risk-based audit methodologies and internal control systems, with regulatory familiarity as a plus
• AI & Technology You have hands-on experience with AI tools and a solid understanding of ML concepts and LLM-related risks
• Data Skills You are proficient in data analysis tools such as SQL, Python, Power BI, or similar
• Soft Skills You bring strong analytical thinking, structured judgement, and excellent communication skills
• Mindset & Language You demonstrate integrity, initiative, curiosity for new technologies, and are fluent in English (German is an advantage)

WHAT WE OFFER

• The SIXT Lisbon Experience Two of Lisbon's most exciting hubs — Factory Lisboa in Beato and ARTs Lisboa in Parque das Nações — are where you'll find your new home base. Expect a fast-paced, international atmosphere where ideas flow freely, people genuinely look out for each other, and no two days feel quite the same

• Community & International Environment Join a truly global workplace with colleagues from many nationalities. Regular team events, community activities, and inspiring talks with internal and external speakers make our Lisbon hubs more than just an office

• Flexibility & Modern Work Setup Benefit from a hybrid working model with two office days per week and flexible working hours. Our modern offices are designed for collaboration while allowing you the flexibility to work in the way that suits you best

• AI at your fingertips From day one, you'll have access to Claude by Anthropic and SIXTgpt, SIXT's own AI platform, to supercharge your work. We invest in every team member's AI journey: encouraging experimentation, building knowledge, and making sure you're ahead of the curve

• Time Off & Wellbeing Enjoy 28 vacation days per year, an additional day off on your birthday, one volunteer day annually, and private health insurance that also covers your spouse and children free of charge

• Everyday Benefits Receive a yearly Coverflex allowance and a daily meal allowance to make life a little easier every day

• Employee Perks Get exclusive rates on all SIXT services, with special discounts extended to your family and friends. Because great perks are even better when you can share them

About us:

We are a globally leading mobility service provider with a revenue of €4.00 billion and around 9,000 employees worldwide. Our mobility platform ONE combines our products SIXT rent (car rental), SIXT share (car sharing), SIXT ride (taxi, ride, and chauffeur services), and SIXT+ (car subscription), giving our customers access to our fleet of 350,000 vehicles, the services of 4,000 cooperation partners, and around 5 million drivers worldwide. Together with our franchise partners, we are present in more than 110 countries at 2,000 rental stations. At SIXT, top-tier customer experience and outstanding customer service are our highest priorities. We believe in true entrepreneurship and long-term stability and align our corporate strategy with foresight. Get started with us and apply now!