QUEST Investment Partners
QUEST Investment Partners is a real estate project development and investment company with offices in Hamburg, Berlin, Frankfurt und Munich.


On 15 June 2016, the company was estab­lished by the partners Erck Rickmers, Jan Rouven Künzel and Theja Geyer. With QUEST Investment Partners, experi­enced entre­pre­neurs from Hamburg aim to set new standards in real estate project devel­opment and management.

Managing directors

The QUEST Investment Partners team has far-reaching experience in the devel­opment of retail, office, residential and speciality real estate. In the area of devel­opment and asset­man­agement, QUEST offers the holistic range of services for real estate. The devel­opment, realization, struc­turing and management of real estate.


Jan Rouven Künzel

Jan Rouven Künzel is a partner and managing director of the QUEST Investment GmbH. He is the head of the units New Business, Project Devel­opment, Finances and Organisation.

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    On behalf of the Art-Invest Real Estate group of companies, he was, as a partner, respon­sible for the business activ­ities of the group in Hamburg and nationwide for the business unit Retail.

    Prior to this, Jan Rouven Künzel developed for seven years highstreet projects for the private investors of the B&L Group in Germany. As a branch manager for IVG, he estab­lished the devel­opment business in Hamburg and was additionally respon­sible for the asset management for all real estate properties in Hamburg and Northern Germany with an overall value of EUR 1.6 billion. After that, he assumed in the role of a managing partner of Water­bound Real Estate the respon­si­bility for the project devel­op­ments of the Mayfair AG.

    Jan Rouven Künzel is a trained Diplom-Ingenieur (graduate engineer) of Archi­tecture (Campus Kiel) und Diplom-Ökonom (qualified economist) (ADI – Beruf­sakademie Stuttgart).


Theja Geyer

Theja Geyer is a partner and managing director of the QUEST Investment GmbH. He is the head of the units Project Devel­opment, Investment, Asset Management as well as Planning and Construction.

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    On behalf of the Art-Invest Real Estate group of companies he was, as a partner, respon­sible for the project Alter Wall in Hamburg with a volume of EUR 250 million.

    Prior to that, Theja Geyer was the autho­rized signatory of Water­bound Real Estate and in this capacity he was respon­sible for the project in the project devel­opment for the Mayfair AG. At IVG, he was respon­sible for the rental business, the project devel­opment and the asset management inter alia for the European headquarters of the Hermes Logis­tik­gruppe. Being an architekt with GKK (Gössler, Kinz, Kreienbaum), he developed for the private investors such as the B&L-Group office and retail objects in Hamburg.

    Theja Geyer is Diplom-Ingenieur Architect (graduate engineer and architect) (Campus Brunswick)


Dipl. Ing. Architekt

Ulrich Rössing

Ulrich Rössing is Managing Director at QUEST Management GmbH, in charge of technical devel­opment, investment management as well as the planning and construction division.

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    Ulrich Rössing worked at ECE Projek­t­man­agement G.m.b.H. & Co. KG in Hamburg for more than twelve years. Since 2008, he had been in charge of project and construction management of the office, traffic and industry projects in his capacity as Director Construction. He was also Managing Director of several general contractor companies.

    From 2017 to 2020, he served as Managing Director of DSR Immobilien GmbH in Hamburg and Rostock, where he was respon­sible for the technical project devel­opment and the project management of various holiday hotels and resorts.

    Prior to that, he carried out planning-related work as a freelance architect and was subse­quently employed by a general contractor operating across Germany for several years. Here, his respon­si­bil­ities included tenant and planning coordination.

    Ulrich Rössing graduated at Leipniz University in Hanover. As an architect, he is a member of the Hamburg Chamber of Architects.


Ass.jur., MBA, BiBu, LL.M.

Dr. Ricardo Alvarez

As Commercial Managing Director at QUEST Management GmbH, Ricardo Alvarez is in charge of Finance, Opera­tions and Human Resources.

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    In his role as Head of Controlling, Organ­i­sation & Insurance at Deutsche Afrika-Linien & John T. Essberger in Hamburg, Ricardo Alvarez was in charge of business planning, investment and divestment, digital­i­sation of business processes as well as risk management and reporting from 2008 to 2020. He was also respon­sible for insurance contract design and claims settle­ments across the entire group of companies.

    From 2001 to 2008, he worked at Deloitte Consulting and Arthur Andersen Business Consulting as Project Leader. His activ­ities focused on finance trans­for­mation projects, incl. controlling, accounting and IT subjects at listed companies in Bonn, Munich, Tokyo and Johannesburg.

    Ricardo Alvarez holds a doctorate in law and a Bachelor Profes­sional of Accounting (CCI). He has degrees from the Univer­sities of Mainz and Bonn, the Instituto de Empresa in Madrid, Copen­hagen Business School and City University London

Head of Sourcing & Acquisitions

Bachelor of Arts

Valeria Naumenkova

Valeria Naumenkova is Director of Sourcing & Acqui­si­tions at the Berlin office. She is respon­sible for the purchase and sale of real estate investments.

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    Prior to that, she worked as an investment broker in the office and retail sector at Cushman & Wakefield in Berlin for four years. After studying real estate economics, Valeria Naumenkova spent five years working from London and Milan as an independent broker for cement products on the Russian market. During her studies she was a working student at Hines Immobilien GmbH in the sales division for closed-end real estate funds for two and a half years. She was also an intern in the fields of real estate finance and debt sales at Merrill Lynch in Frankfurt.

    Valeria Naumenkova holds a Bachelor of Arts in Real Estate Economics. She completed her studies at the University of Applied Sciences and Arts in Holzminden and at the School of Surveying at Kingston University in London. 

Head of Trans­ac­tions & Partnering


Luis Walther-Kraft

As Head of Trans­ac­tions & Partnering, Luis Walther-Kraft is respon­sible for the purchase and sale of real estate as well as for partner­ships with third-party investors (joint ventures). 

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    Luis Walther-Kraft previ­ously worked at GLL Real Estate Partners in Munich and Paris on the purchase and sale of real estate in the pan-European sector. He was involved in trans­ac­tions amounting to 500 million euros.

    Prior to that, he worked for a company valuing European real estate.

    Luis Walther-Kraft completed a Master of Science in Real Estate at the IREBS Inter­na­tional Real Estate Business School in Regensburg and at Henley Business School in Reading, UK. 

Head of

Dipl. Ing. Stadt­planung (Urban Planning)

Kira Groth

As Head of Leasing, Kira Groth is in charge of leasing all the properties in the QUEST portfolio across the various locations.

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    Since 2016, Kira Groth has been working for QUEST Investment Partners in Hamburg as Project Manager and Senior Investment Manager. She has overseen numerous projects, including listed properties. Since 2021, she has also been managing all activ­ities related to the leasing of the properties.

    She previ­ously worked at the publicly listed construction group Hochtief for six years, most recently as Senior Project Developer. During this time, one of her respon­si­bil­ities was the Hamburg Heights district devel­opment project with an investment volume of around 180 million euros.

    Kira Groth holds a degree in urban planning (Diplom-Ingenieurin für Stadt­planung) from Hamburg University of Technology and HafenCity University in Hamburg.

Branch Manager Berlin


Arne Siemens

Arne Siemens is Branch Manager at QUEST Management GmbH in Berlin. He is in charge of the new business, project devel­opment and financing of the Berlin real estate portfolio.

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    Until 2017, he worked as Project Lead and Investment Manager at the Art-Invest Real Estate Group, where one of his respon­si­bil­ities was the shopping and office complex Alter Wall in Hamburg, valued at 250 million euros. In addition, he oversaw various sales and acqui­si­tions as well as real estate devel­op­ments in Berlin and Hamburg for Art-Invest. At ECE Projek­t­man­agement GmbH & Co. KG, he worked in trans­action management for several years.

    Arne Siemens holds a Master of Science in Inter­na­tional Project Management from Glasgow Caledonian University as well as a Bachelor of Arts in Inter­na­tional Real Estate Management from Aschaf­fenburg University of Applied Sciences.

Branch Manager Munich


Thomas J. Eirich

Thomas J. Eirich is Branch Manager and Senior Investment Manager at QUEST Management GmbH in Munich, in charge of the new business, devel­opment and financing of the Munich real estate projects.

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    He spent five years as Deputy Director and Fund Manager in the real estate division of the investment company Invesco Ltd. During this time, he was respon­sible for global trans­ac­tions of logistics, office, residential and retail properties worth 1.3 billion euros. He also gained previous experience in fund and investment management at Hines and MEAG Asset Management.

    Thomas J. Eirich holds a Master of Science in Real Estate from Henley Business School in Reading, UK, and from IREBS in Regensburg. He completed a Bachelor of Science in Business Admin­is­tration at Ludwig Maxim­ilian University in Munich.



The devel­opment of contin­u­ously lucrative real estate by a combi­nation of the factors:
locationproject ideascapitaltiming

QUEST has the access to the market, the resources and the expertise to develop real estate to the next level or from scratch. In the selection of the locations, QUEST is focussing in the field of office premises on urban ares (City and district locations) in Hamburg and Berlin as well on good central locations (prime locations) of German urban centers in the area of retail devel­op­ments. Due to longterm connec­tions and the good relationship with the tenants, new project ideas evolve even before the acqui­sition of real property.

Investment strategy
The aim is the creation of core real estate. Invest­ments are only made in very good locations. There, the quality of the object is constantly improved.

The creation of values through:

  • Devel­opment of projects
  • Refur­bishment and repositioning
  • Improvement of the rental and revenue situation


The QUEST Management GmbH is operating a holistic and sustainable real estate management.

From the analysis of the special given realities of an object through the estab­lishment of building laws and the solving of complex settings of tasks regarding construc­tional matters to the precise and cost-efficient management, QUEST is controlling any and all stages of the value-added chain of real estate. In the realization of sophis­ti­cated retail estates or modern office premises QUEST ensures from the start a smooth process through a close cooper­ation with the author­ities, munic­i­pal­ities and project partners as well as the proven cooper­ation with renowned archi­tects and consulting engineers.



Investment model
QUEST Investment Partners offers invest­ments in German real estate with an holistic asset management and project devel­opment approach for commercial and office buildings. In the interest of the investors, QUEST counts on quality and individuality.

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