Team

Christian von Järten was born in Hamburg. A qualified businessman in the property and housing industry, he is the founder and managing director of the VON JÄRTEN & CIE Immobilien group of companies, to which NEUBAUTEAM also belongs.

Among other things, he has provided comprehensive advice to private and institutional investors in a leading UK property consultancy and successfully assisted in the development of portfolios in Germany.

Before founding his companies, Christian von Järten worked as an office manager for Sotheby’s International Realty in Hamburg and coordinated the sales activities for a destination in Switzerland for a well-known major investor in Zurich.

Christian von Järten has been present on the property market for two decades and has excellent national and international contacts with numerous decision-makers from key property players. In total, the projects he has supported have a property development and transaction volume of around 1 billion euros. Company: Engel & Völkers AG, Hamburgische Immobilien Invest AG, Savills, Sotheby’s International Realty, ORASCOM Development.

Fabian Müller was born in Hamburg, has been working in the property industry for almost 10 years and was already enthusiastic about property at a young age.

Mr Müller completed his dual training as a real estate agent at the renowned real estate agency Engel & Völkers, where he quickly distinguished himself through his commitment and expertise. He soon took over the management of the letting department and distinguished himself not only through his high level of professionalism, but also through his enthusiasm for the property sector. At the same time, he demonstrated his sales talent in the high-end residential property segment.

With his extensive market knowledge and over 250+ successfully completed transactions in the rental and sales sector, Mr Müller has earned an excellent reputation in the industry. His reliability, his negotiating skills and his eye for the essentials make him an experienced partner who understands customer needs perfectly and always finds optimal solutions.

In addition to his professional passion, Fabian Müller is also very active in his private life and takes advantage of the many sporting opportunities in and around Hamburg. In his free time, he can often be found on the Alster, where he regularly goes jogging.

Julia Bos was born in Munich and grew up in Geneva, Switzerland. Thanks to her bilingual upbringing, she has an international outlook and moves with ease in a variety of cultural settings. As well as German and French, she speaks English fluently. She is particularly captivated by Hamburg’s unique charm, with its prestigious and stylish properties, characterful historic villas, diverse green spaces and the special connection between the city and the water around the Alster and the Elbe.

She completed her Abitur at the renowned Louisenlund boarding school before successfully graduating with a Bachelor of Arts (BA) in Real Estate Management from Fresenius University of Applied Sciences in Hamburg. From an early age, she developed a keen enthusiasm for property and the diverse opportunities this sector offers. She is particularly committed to providing personalised advice and supporting people in realising their personal aspirations and property dreams.

Thanks to her strong communication skills, her negotiating prowess and her ability to adapt to different wishes and concerns on a case-by-case basis, she creates a trusting and personal foundation for successful business relationships. In addition to her degree, she completed training as a mediator, which enables her to demonstrate a high degree of empathy and solution-oriented thinking, particularly in challenging discussion and negotiation situations.

People, trust and high-quality property – it is this combination that inspires Janette Corleis and has shaped her career path.

After nearly 14 years at the renowned piano manufacturer Steinway & Sons, her career path led her into the property sector. She deepened her interest in this field by undertaking a part-time degree in Real Estate Economics (ADI) whilst working, and today combines a sound understanding of business administration with organisational skills, strong communication abilities and a strong commitment to service.

As Executive Assistant, Janette Corleis supports the team at VON JÄRTEN & CIE with a structured, reliable and forward-thinking approach to her work. She ensures that organisational processes run smoothly and particularly values personal interaction with clients, business partners and the entire team. Reliability, discretion and high standards of quality characterise her day-to-day work.

In her private life, Janette loves spending time with her young daughter. She finds a conscious balance to her working life through yoga, spending time in nature and travelling. Encounters with other people and cultures enrich her life, as does her conviction that openness, appreciation and curiosity form the basis for good relationships, both personally and professionally.

Sheila Hallwass is an experienced marketing and communications expert with 16 years of professional experience. After training as a marketing communications specialist and completing a part-time degree in public relations, she began her career in well-known agencies and companies. There she developed into a specialist in the marketing communications mix and continuously deepened her expertise.

Through her work with brands from the high-end segment, she has developed a keen sense of stylish communication and creative storytelling.

Since 2022, she has been supporting JÄRTEN & CIE in the property sector, where she contributes her expertise to the successful positioning and placement of property projects. Her focus is on the development and implementation of customised communication strategies to present each property in the best possible way.

In addition to her professional activities, Sheila Hallwass finds balance in yoga, which she not only practises but also teaches. This personal passion gives her strength and strengthens her ability to work in a focussed and creative way.

Celina Steffensen joined the VON JÄRTEN & CIE marketing team as a working student in March 2025 and impresses with her creative way of thinking and her flair for digital trends. Born in Hamburg, she successfully completed her bachelor’s degree in media management and digital marketing in the same year and already has a wealth of practical experience.

During her studies, she worked as a student trainee at Aspria Germany, where she supported the marketing team with fresh ideas, initiative and a clear eye for effective communication.
A semester abroad in Australia also gave her exciting insights into international marketing strategies and broadened her horizons in the field of global brand management.

From March 2025, Celina will be studying for a Master’s degree in Media and Communication Management with the aim of deepening her specialist knowledge and developing future-oriented communication solutions.

In her free time, she finds balance at the gym, where she regularly works out and recharges her batteries for her varied tasks. With her open manner and high level of commitment, she is a valuable asset to the team.