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About AJL Atalier

AJL Atelier is a globally recognized consultancy specializing in the Short-Term Rental (STR) industry. We are known for our unique blend of trend forecasting, consumer insight, brand strategy, and innovation. Our expertise spans from working with some of the world’s largest STR companies to supporting even the smallest emerging businesses in the sector.

Our mission is simple: to future-proof STR organizations by providing a strategic edge in an ever-evolving market landscape.

Founded in 2018 by a passionate team of three individuals (and three children), AJL Atelier has grown into a global powerhouse with an All-Star team and offices around the world. Our dedicated team of in-house experts, who live and breathe the STR industry, leverage hands-on experience to understand your business and bring your goals to life.

Throughout our journey, we have remained committed to connecting the global Short-Term Rental community and elevating professionalism across the industry. Whether you’re an established player or just starting out, we look forward to working with you and helping you succeed in this dynamic space.

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Advising you with a hand-picked team of experts

AJL Atelier prides itself in its unrivalled expertise, led by Simon Lehmann, one of the world’s leading vacation rental experts.

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Simon Lehmann

Founder & CEO, Keynote Speaker, Board Member, Serial Angel Investor

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Simon is one of the world’s foremost experts on short-term rental and vacation rental. He leads AJL Atelier, a specialised vacation rental and business consultancy while also advising multiple companies as Board Member and Executive Chairman.

A sough-after speaker, panelist and moderator, Simon loves to broach high-level and technical topics alike, from the future trends of short-term rental to the specifics of online distribution in the top 5 OTAs.

Previously, Simon was the Co-Founder & Chairman of Vacasa Europe, former President of PhocusWright and ex-Board member of HomeAway, to name but a few. He’s also an accomplished operator, having led Interhome, Hotelplan Group and Swissport as CEO, Deputy CEO and EVP Commercial respectively.

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Cristina Lehmann

Founder, Head of People & Administration

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Cristina is the lighthouse in the ocean, the backbone and soul of AJL Atelier. As one of the founders of the company, she looks after the team – core members as well as expert contractors – and the administration of the Atelier, making sure that everything runs smoothly and stays on track, for employees, clients and partners. With her intuitive personality, detail-orientated focus and fervent passion for coaching and developing team members, Cristina is an invaluable member of the team who is constantly creating value for our clients.

Cristina brings years of experience coordinating C-Suite executives and leading a variety of strategic HR initiatives such as improving company culture, tracking and boosting employee motivation, enhancing individual and team performance or developing and maintaining leadership talent pools.

Previously, Cristina worked in a number industries including Airlines, Ground Handling, Vacation Rental and Industrial Components Production.

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Travis Callahan

President and Partner

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Over the past 25 years, Travis has founded and successfully sold companies and has managed over €30 billion of the world’s most highly publicised venture capital Tech, M&A and restructuring transactions.

He was a member of a team of 5 executives recognized with the “Global Restructuring Deal of the Year” and “European Restructuring Deal of the Year” awards for their success with managing the corporate reorganization of Parmalat. Travis is a US bar-qualified lawyer and holds a Trium Global Executive MBA from NYU Stern, London School of Economics and HEC Paris; a Juris Doctorate from Boston College School of Law; and Master’s and Bachelor’s degrees from American International College. Travis is also an avid outdoor enthusiast and has climbed Mt. Kilimanjaro, voyaged to Antarctica, dived the Galapagos Islands, trained Aikido in Japan and completed triathlons and marathons throughout the world.

Travis is deeply committed to enriching the lives of underprivileged children and sits on boards and volunteers considerable time with homes and schools for orphaned children in Africa and summer camps for youth in the United States.

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Gernot Zechner

Head of Operations & Senior Consultant

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Gernot brings a profound understanding of the hospitality tech ecosystem and it’s dynamics. Before his focus on the short-term rental industry, he spent the last +5 years at the world’s largest OTA, Booking.com, where he gained wide-ranging knowledge of the hospitality tech ecosystem.

He led product strategy, commercial development, and operations for newly established product teams and acted as “GM” in a fast-moving new product development vertical. He is a big picture strategy thinker who is simultaneously able to zoom in and think through execution details. This is an extremely effective combination when evaluating businesses, and in gaining a strategic advantage.

At AJL Atelier, he’s leading the redesign of operational workflows and acts as strategic business adviser for the broad range of AJL’s the client portfolio.

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Markus Gruber

Strategic Advisor

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Markus Gruber is a seasoned Strategic Advisor at AJL Atelier, specializing in revenue growth, digital transformation, and business model innovation. With extensive experience in optimizing operations and evolving business models, particularly within the short-term rental sector, Markus leverages data-driven insights to deliver sustainable growth solutions.

He has led successful digital transformation initiatives, transitioning businesses to scalable, subscription-based models, and has played a key role in integrating M&A targets to enhance operational efficiency.

Markus holds a PhD in Political Science from the University of Vienna, a postgraduate Master’s in International Economics from Università degli Studi di Roma Tor Vergata, and is a certified systemic consultant from Graz, Austria.

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Ivan Givelet

Consultant

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Ivan identified and oversaw the on-the-ground operations for a Property Management Company for a couple of years after some initial experience in the luxury hotel industry.

Having gained knowledge and experience working with an innovative Operations Management Tool,  he is motivated and skilled at providing operational insights to Property Managers and Operations managers alike, advising on processes and best practices.

The practical and technological experience acquired enables Ivan to provide AJL Atelier and its partners further industry knowledge and a fresh perspective on the consulting services they provide.

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Markos Tsinganis

Business Analyst

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Markos brings a passion for research and answering questions with data. Before focusing on the short-term rental industry, he spent 4+ years as a quality assurance manager at an international logistics company, where he gained experience in data-led company performance and service quality improvement.

His technical solutions and performance improvements led the company to be awarded the ISO 9001 certification. Formerly a researcher in academia, he worked at ETH Zürich, where he used his technical expertise to investigate biological processes. He is now applying his scientific mindset and excellent analytical skills to solve business problems and provide a fresh perspective to clients.

At AJL Atelier he will use his expertise to strengthen our research capabilities and contribute to our industry knowledge with data-driven insights.

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Keith Chan

Head of Finance

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Keith is a London-based CPA with over 23 years of experience in accounting and finance. He has spent more than 8 years with a Big Four accounting firm and a listed group in Hong Kong, during which he has accumulated extensive expertise in corporate finance.

Keith excels in assisting his clients with financial due diligence and audit preparations. Over the past 15 years, he has focused on providing advisory and accounting services to over 100 clients, specializing in M&A, fundraising for IPO projects and startups, VC investment transactions, and finance operations excellence.

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