Our Company

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The real estate industry is changing rapidly. At BuildingMinds, we prepare real estate managers for the trends and unexpected challenges of tomorrow. We empower businesses – by making them adaptable, resilient and agile.

Our team of more than 150 outstanding experts from diverse backgrounds use the power of data to create a more sustainable and profitable real estate industry. Our cooperative approach, interdisciplinary teamwork and flat hierarchy enable us to learn and innovate. BuildingMinds – real estate management services from professionals, for professionals.


Our vision is to transform real estate from a resource-consuming industry into a resource- generating industry.


We help create a digital brain that enables the owners and managers of real estate to drive the performance of their portfolios, both in terms of day-to-day operations and long-term strategy.

Our team

team Marek Sacha

Marek Sacha

Chief Executive Officer

With a strong entrepreneurial background and a profound knowledge of tech, Marek is one of the brightest young entrepreneurs according to Forbes’ 30-under-30 list. Throughout his career, he took key leadership roles, serving as a consultant at McKinsey & Company and a CEO at the online trading platform XOM Materials. He also co-founded and led the award-winning UK digital healthcare platform Cera Care as well as the European online grocery retailer, Rohlik Group. At BuildingMinds, Marek is leading the company into a new journey of growth.

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Dr. Alexey Ershov​

Chief Technology & Product Officer

Alexey is a senior tech executive with 20+ years of global experience in analytics, AI/ML, digital transformation, IoT, Smart Cities, and retail. At BuildingMinds, Alexey is responsible for driving innovation and leading the company's tech and product organizations. Before joining BuildingMinds, he was a senior executive at IBM and Lidl. He started his business career at McKinsey & Company after receiving a Ph.D. degree in Physics from Harvard University.

Hannah Stern

Hannah Stern

Chief Commercial Officer

Hannah brings 10 years of experience in engaging and supporting multi-national customer accounts with a background in retail and CRE. She also focuses on analysis and utilization of market insights, ensuring relevance of product offerings to partners and customers. Hannah holds an MBA from Columbia Business School. At BuildingMinds, Hannah leverages her expertise to drive the company's commercial strategies.

team Marcel Steffen

Marcel Steffen

Chief Financial Officer

With a background in computing science and over 10 years of experience at the Schindler Group, Marcel is a highly skilled finance and controlling executive, providing financial leadership and strategic guidance to BuildingMinds. With an MSc in Business Informatics from the University of Zurich, his experience extends to IT consultancy and project leadership. At BuildingMinds, Marcel is driving growth through efficient, digital, and scalable processes.

Julia Winkelmann

Julia Winkelmann

Chief HR Officer

Julia has an extensive background in Human resources, communication, and B2B leadership. Her impressive track record includes serving as Chief People Officer at the e-bike subscription startup Dance, VP People & Workplace at SoundCloud, and Head of Talent Acquisition at eBay. She has also held HR leadership roles at Brands4Friends and mobile.de. Julia is a trained coach and mindfulness trainer. At BuildingMinds, Julia translates business strategy into people strategy, fostering a high-performance culture and leading talent acquisition, development, and retention.

Dr. Jens H.

Dr. Jens Hirsch

Chief Scientific Officer

Jens is a senior sustainability expert with a Ph.D. from IRE|BS in Regensburg, focuses on decarbonization, geodata/GIS, climate risk, and energy efficiency. Throughout his career, he led various roles and initiatives, including the EU project "CRREM Carbon Risk Real Estate Monitor" as well as the head of research at the IIÖ Institute for Real Estate Economics. At BuildingMinds, Jens is leading the development of integrated decarbonization and digitalization strategies for real estate portfolios.

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Marina Cirio

Chief of Staff

Marina is experienced in senior stakeholder management, structuring and executing business-critical action plans, and strategy development. With a background in international relations and journalism, Marina has worked in the UN Economic & Social Council organization, leading sustainability businesses, and focusing on growth and inclusion. With strong analytical and problem-solving skills, she optimizes business processes and strategy implementation at BuildingMinds. 


Code of Conduct

BuildingMinds employees comply with the respective applicable laws and regulations.


Time flies – and with time, comes experience

BuildingMinds was founded in 2019 by Schindler Group, the Swiss multinational manufacturer of escalators, moving walkways and elevators, to meet the company's need for building data monitoring and management.

With EUR 150 million in funding from Schindler and technological support from Microsoft, we have since expanded to become a major international provider of software as a service (SaaS) for real estate managers, meeting their needs in the areas of reporting and ESG, portfolio management and digital building twins. Our portfolio of services is continuously growing.

We help create a digital brain that drives the performance of real estate portfolios, boosting efficiency, sustainability and long-term value.

Marek Sacha Circle
Marek Sacha
CEO, BuildingMinds

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Want to be part of our team?

Check out our current job offers or send us your résumé. We look forward to hearing from you.