TEAM

Meet our Team

David has a background as an entrepreneur in the entertainment industry. He also was a partner at global consulting firm McKinsey & Company, where he advised international companies for 13 years.

 

In his free time, David is an avid waterskier, cyclist and golfer. He holds a Masters Degree in Quantitative Economics from the University of St. Gallen, Switzerland.

David Speiser

David Speiser

CEO, Co-Founder,

Member of the Board

David has a background as an entrepreneur in the entertainment industry. He also was a partner at global consulting firm McKinsey & Company, where he advised international companies for 13 years.

 

In his free time, David is an avid waterskier, cyclist and golfer. He holds a Masters Degree in Quantitative Economics from the University of St. Gallen, Switzerland.

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Thomas Boerman

Head of Real Estate & Construction

Thomas is an engineer, architect, and real estate developer with deep expertise in building Topgolf venues across the globe. He previously was with ARCO Murray, a premier design-build contractor in the USA.

 

Thomas enjoys scuba diving, skiing, and adventure sports. He holds a Master of Architecture degree from the Illinois Institute of Technology and Bachelor of Science in Civil Engineering degree from the University of Illinois –Urbana Champaign.

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Patrick Davis

Head of Operations * 

 

(* as of July 2021) 

Patrick has a strong background in hospitality, where he has held several senior leadership positions with The Cosmopolitan of Las Vegas and the Mandarin Oriental Hotel Group.

He has a diploma in Hotel Business and Management from the Chamber of Commerce and Industry in Germany. In his free time, he likes to ride his motorcycle and enjoys outdoor activities, such as mountain-biking and hiking with family and friends.

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Stefan Ebermann

Expansion Manager

Stefan was responsible for sales and business development at a global entertainment and e-sports company. Before that he held roles at Amazon and BMW.

 

In his free time, Stefan follows his passion for golf and cross-fit. He holds a Masters Degree in Business Administration from the University of Innsbruck in Austria.

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Marco Schellöh

Finance Manager

Topgolf Oberhausen

Marco has over 20 years of experience in a wide range of Finance functions in multiple industries (e.g., food, drinks, games or finance) in NRW Germany. He is an expert in accounting, budgeting, forecasting, purchasing and Finance ERP implementations.

 

In his free time he is a core member of the German Life Saving Association. He holds a Degree in Management from the University of Applied Sciences in Essen, Germany.

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Sara Radonic

Executive Assistant*

(* as of June 2021)

Sara has worked at companies in multiple industries. Before joining Greenreb, she was with a fast-growing sports chain, a specialized construction company and a leading audit firm.

 

When she is not working, she likes to paint, enjoy the outdoors and travel to warmer destinations. She concluded an apprenticeship with an advanced diploma.

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Eric Grob

CFO, Co-Founder,

Member of the Board

Eric has founded and managed several businesses, including a Swiss real estate development company. He was a partner at McKinsey & Company for 12 years.

 

Eric is a long-distance runner and enjoys sports overall, including e-sports in which he competes frequently. He holds a Masters Degree in Business Administration from the University of St. Gallen, Switzerland.

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Phillip Fu

Head of Technology & Innovation

Phillip has over 20 years experience in leading global technology and business process transformations at a number of distinguished enterprises (PwC, UBS, Credit Suisse). Additionally, Phillip was the CTO for a technology start-up. 

 

Phillip enjoys travelling, football and videography. He holds a Masters of Computer Science as well as a joint Executive MBA from the Rotman School of Management in Toronto & University of St. Gallen, Switzerland.

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Jakob Yamac

Head of Operations *

& Operations Manager F&B

(* until July 2021)

Jakob has a depth of experience in vibrant, high-end F&B operations that he gained from his leadership roles around the world. Before Greenreb, he was with Kempinski in Bangkok.

In his free time, Jakob enjoys football, travelling and spending time with friends and family. He holds a diploma in hospitality management from the WIHOGA Dortmund, Germany. 

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Alessio Feser

Marketing Manager

Alessio has a background in hotels, e.g., as part of the kitchen team of 5-star hotels or as Assistant Restaurant Manager. 

 

In his free time, he enjoys playing basketball and tennis and loves to cook for his family and friends. Alessio holds a Bachelors Degree in hotel management and a Masters Degree in Marketing from the University of Exeter, UK.

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Ossama Abdelatif

Technology & Innovation Manager

Topgolf Oberhausen

Ossama has over 12 years of IT experience in the Hospitality industry. In his last role, he was the Director of IT for several 5-star hotels in the UAE. Before that he held various IT positions in hotels both in pre- and post-opening projects.

 

Besides Technology being his biggest hobby, he enjoys football, traveling and outdoor activities. He has a Bachelor of Science from the Fayoum University, Egypt.

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Claudio Feser

Chairman of the Board

Claudio is a Senior Advisor to McKinsey & Company, where he was a Director and board member. He is a member of the Executive Education Committee of the University of St. Gallen and the author of various books on leadership.

 

In his free time, Claudio is a competitive tennis player and producer of wine and food in the Piemont region. He holds an MBA from Insead.