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 100 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

Our experts use the power of data to build a more sustainable real estate industry.
team Marek Sacha

Marek Sacha

Chief Executive Officer

In 2016, Marek was included by Forbes on its 30-under-30 list of the brightest young entrepreneurs, leaders and stars aged under 30.

A former consultant at McKinsey & Company, Marek boasts a strong entrepreneurial background and a profound knowledge of tech. He was previously CEO of online trading platform XOM Materials. He also co-founded and led award-winning UK digital healthcare platform Cera Care and top European online grocery retailer Rohlik Group.

Alexey portrait

Dr. Alexey Ershov​

Chief Technology & Product Officer

From particle physicist to senior tech executive with over 20 years of international experience in data & analytics, AI/ML, digital transformation, IoT, Smart Cities, and retail. Started at McKinsey, Vice President at IBM, Chief Analytics Officer at Lidl. Led international teams in sales, analytics, product development, and management consulting. Harvard Physics PhD.

Hannah Stern

Hannah Stern

Chief Commercial Officer

Experienced in account management and customer relationship development with a background in retail and CRE. Hannah brings 10 years experience engaging and supporting multi-national customer accounts. She also focuses on analysis and utilization of market insights, ensuring relevance of product offerings partners and customers.

Hannah has an MBA from Columbia Business School.

team Marcel Steffen

Marcel Steffen

Chief Financial Officer

With a background in computing science and over a decade of experience at the Schindler Group, Marcel is a highly skilled finance and controlling executive who excels in providing financial leadership and strategic guidance, fostering profitable growth through efficient, digital, and scalable processes. Prior to joining Schindler, Marcel sharpened his expertise as an IT strategy consultant.

Marcel has an MSc in Business Informatics from the University of Zurich.

Dr. Jens H.

Dr. Jens Hirsch

Chief Scientific Officer

Jens is Chief Scientific Officer at BuildingMinds and is responsible for the development of integrated decarbonization and digitalization strategies for real estate portfolios.

Before he joined BuildingMinds, Jens led the EU research project “CRREM Carbon Risk Real Estate Monitor” which translates the required emission targets of the Paris Agreement into concrete decarbonization pathways for real estate. He holds a Ph.D. from the IRE|BS in Regensburg. After that, he worked at the IIÖ Institute for Real Estate Economics as head of research and is a member of the DGNB Real Estate Advisory Board.

Duncan Binger

Dr. Duncan Binger

Chief Technology Officer

A former consultant at BearingPoint, Duncan is an experienced team leader and program manager. He is passionate about technology and how it can be leveraged to build innovative products. He has particular expertise in smart buildings, digital products and cloud platforms, and is responsible at BuildingMinds for development, DevOps, architecture and data science/AI.

Duncan has a PhD in Physics from the University of Bristol, UK.

Marina headshot

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 UN Economic & Social Council organization and leading sustainability businesses, focusing in growth and inclusion. With strong analytical and problem-solving skills, she optimizes business processes and strategy implementation at BuildingMinds. 

Karina Loekmanwidjaja

Karina Loekmanwidjaja

Product Owner

Karina is an architect and urban planner, with an MBA in Building Sustainability from Berlin Technical University. Karina has experience as a Project Manager and Sustainability Consultant in the Real Estate sector, overseeing retrofit projects in office and residential buildings, as well as pre-assessing LEED and BREAM projects.

At BuildingMinds, Karina is a Product Owner leading the domain expert team and the sustainability product development. With her team, she delivers features related to the assets' resource consumption, decarbonisation, and retrofit measures.

Florencia Perez Pena

Florencia Perez Pena

Sustainability Domain Expert

Florencia is a Civil Engineer with a master’s degree from TU Berlin, where she focused on addressing the building sector in an innovative and sustainable way. She specialised in the use of sensor data to analyse energy performance in residential buildings. With several years of experience in consulting, and supporting clients, Florencia defines the technical scope for real estate projects. She also has experience in building retrofit planning using sensor data to meet Net Zero targets.

At BuildingMinds, Florencia is a Sustainability Domain Expert, focusing on product development for retrofit simulation features.

Anggie Rahma Pratiwi

Anggie Rahma Pratiwi

Sustainability Domain Expert

Anggie holds an MBA from Technical University Berlin. Her expertise, is in the area of ESG reporting and LCA assessment, based on her previous professional experience as a sustainability consultant and a scientific researcher. Anggie was involved in several ESG-related national and international projects such as UNEP Roadmap Organizational LCA, ESG consultancy projects of several Southeast Asia companies, and an internal DLR Research Institute project.

At BuildingMinds, Anggie is a Sustainability Domain Expert and oversees the development of several ESG reporting dashboards for BuildingMinds platform.


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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