Jakub Řehoř is a sustainability specialist at Česká spořitelna, focusing on reducing the bank’s operational carbon footprint, reporting, electromobility, and the construction of a new headquarters. With a passion for basketball and a strong commitment to driving the world toward more sustainable practices, Jakub applies his expertise to implement innovative solutions that contribute to environmental and social progress. His goal is to inspire others to adopt sustainable practices and create positive change within the banking sector.
GreenHack People – Mentors, Jury, Organizers
GreenHack Jury & Mentors
Jitka Čejková (Jury)
Researcher
Jitka Čejková is an associate professor at the Department of Chemical Engineering at the University of Chemical Technology in Prague. Her research interests include artificial life and droplets as liquid robots. She is the editor of the book „Karel Čapek’s R.U.R. and the Vision of Artificial Life“, published in Czech under the title Robot 100.
Pavol Hejný (Jury)
Co-founder of the H-du and CollBoard.com
Pavol is the co-founder of the H-Edu teacher platform and online virtual whiteboard CollBoard.com. He has worked on projects for the Czech Ornithological Society and has also developed the online game Towns and many other projects in the past. He has spoken at various conferences such as DevConf, LinuxDays, OpenAlt, Czech VR Fest, Frontendisti, ITnetwork.cz, Jobs Dev, etc. He has organized several technology conferences himself, co-organized hackathons and participated in many startup competitions as a mentor and judge. He keeps up to date with technology events in the Czech Republic and sends a monthly email to people who are interested about the most interesting events on Czech.events.
Jakub Řehoř (Jury)
ESG and Sustainability Specialist
Jan-Eudald Vaquer (Jury)
Pedagogical Lead
Graduate of the primary studies at 42Paris and now Pedagogical Lead at 42Prague. Really passionate about code, technology and education. I’m excited to see new talent grow in the IT sector.
František Fiala (Jury)
Head of Digital transformation Department at ČEPS.
Andrea Ćirlićová (Jury)
Environmental Sustainability Supplier Engagement Lead at Novartis
Andrea Ćirlićová is an environmental sustainability and smart systems expert promoting an integrated approach to solutions. She is in charge of the Scope 3 agenda and supplier engagement in the Global Environmental Sustainability Operations team of Novartis. Prior to this she worked at EY focusing on smart cities, esp. in the area of transport, energy and waste management. From 2003 to 2015 she had held various roles in the energy sector, incl. Business Area Manager for System Development at ENTSOG – European Network for Transmission System Operators for Gas and Head of Regulatory Affairs at Net4Gas.
In 2013-2015, Andrea was a member of the Advisory Council (Grémium) to the Minister for Regional Development on Smart Cities, she was also one of the contributors to the ‘Města budoucnosti’ (Cities of the future) and ‘Průmysl 4.0 Výzva pro Českou republiku’ (Industry 4.0 Challenge for the Czech Republic) publications.
Tomáš Studeník (Mentor & Facilitator)
Radical Innovator & City Hacker
Tomáš is a radical innovator and city hacker. Tomáš holds MBA from the University of Liverpool and MSc in Innovation from HEC Paris. He is the CEO of Insane Business Ideas (www.inbui.com), a consultancy that helps industry leaders and governments innovate. Tomáš organized the first global CEE Hacks hackathon (www.ceehacks.com) in 2017 and has since held numerous innovation events to improve mobility, sustainability, and health of European cities. Apart from consulting companies on innovation strategy, Tomáš holds popular monthly FuckUp Nights (www.fuckupnights.cz) where lessons from failure are publicly shared by distinguished entrepreneurs, scientists, and artists. In 2018, Tomáš published the Big Book of Fuckups (www.fuckupy.cz) that the world-renowned economist Tomáš Sedláček called the book of the year. In 2020, Tomáš is working with a team of artificial intelligence scientists and theatre production to stage the first play written by AI as a celebration of the centenary of the word ‘robot’ (www.theaitre.com).
Marek Miltner (mentor)
Sustainable AI Pioneer
Marek is a trailblazing Sustainable AI Pioneer with extensive experience in academia and industry. Currently, he is a Senior Researcher of AI for Sustainable Energy Transformations at Stanford and Czech Technical University. Previously he spent several years as CTO and Head of Engineering at various international startups, leading the development of user-friendly products that harness the power of generative AI. His standout projects include heading the development of Czechia’s first autonomous racecar, introducing the world’s first text-to-UI-prototype tool, or leading the IT/AI transformation of a major European pharma company. With a passion for AI and GreenTech, he leverages his expertise to drive innovation and create a positive impact of AI for the world in the field of sustainability.
Michal Sikyta (Mentor)
Investment Director at Soulmates Venture
Michal seeks and supports driven founders with innovative approaches – always interested in discussing your ideas. He is an investment director at Soulmates Ventures, an accelerator and VC fund focused on sustainable innovations across the CEE region. In supporting founders and the sustainability community generally, he is involved in the Green Innovation Academy, a non-profit platform founded by Soulmates Ventures. Michal founded Flüchtlinge Willkommen Österreich and has been heavily involved in the expansion of the project throughout Europe. He was behind the development of the non-profit projects PROSA, HOME or work:in. Michal studied Political Science at the University of Vienna and International Relations at Oxford University.
Jiří Šindelář (Mentor)
Head of the Building Information Management Department at ČEPS
I once dreamed of becoming a rock star — and while the stage has been replaced by screens, the
passion remains. These days, I use that energy into building smarter digital tools. My fascination with technology has begun early, back in high school. Later, during my university studies, I spent some time in South Korea, where I wrote my diploma thesis focused on Building Information Management (BIM). BIM and GIS (Geographic Information Systems) have became more than just academic interests — they evolved into my main professional focus. Since then, I’ve been working on integrating BIM and GIS technologies into our company. I enjoy meeting new people and hearing different perspectives,which often help me develop more effective and innovative digitalization solutions.
Lukáš Varaja (Mentor)
Senior Business Analyst at Novartis
Lukáš Varaja successively gained his experience in many IT and non-IT fields, especially in the business analysis, presales, training and business consulting areas. His personal skills and abilities are especially empathic listening skills, ability to understand the client’s language and ability to establish and build strong and straight relationship with the client. In Novartis he has been involved in multiple ESG related areas, but mainly in building an in-house solution for calculation and reporting Scope 3 emissions. Prior to Novartis, he worked at GuideVision as Head of Presales and ServiceNow Certified Trainer, mainly responsible for managing proposals to RFI/RFPs, proposing solution architectures and detailed project scope descriptions, effort estimations, and project plans. As ServiceNow Certified Trainer, he was responsible for delivering ServiceNow public trainings, custom customer trainings, internal enablement trainings and workshops.
Joe Fleming (Mentor)
Advisor at Featherless.ai
GTM leader with a track record of scaling two B2B startups from <$1M to $10M+ ARR. Currently building my own venture while advising early-stage startups.
Jirka Jahn (Mentor)
AI Engineer & Mathematician
Jiří is an experienced AI engineer and mathematician with a background in academic research and industrial software development. With a Ph.D. in Mathematical Analysis and over five years of programming experience across Czech startups and tech companies, Jiří has contributed to projects ranging from deep learning systems to combinatorial optimization on supercomputers. He currently works as an independent AI consultant and developer for several innovation-driven startups, including PromptBook. Jiří brings a rare blend of mathematical rigor, programming versatility, and a passion for using technology to tackle complex challenges and create positive impact on a global scale.
Roman Gdovjak
Country Manager for Slovakia & Expansion Manager at Cyrkl.com
Country Manager for Slovakia & Expansion Manager at Cyrkl.com
Roman is a Country Manager for Slovakia & Expansion Manager at Cyrkl.com – green-tech start-up and trading platform with focus on circularity in waste management. In the European biggest recycling platform, waste of one company could be a wealth for another one and when using machine learning, Cyrkl can manage the right match. He has been focusing on the topic of circular economy for a couple of years now, in the start-up world, but prior to Cyrkl, also in public administration and NGO sector. In public administration in Slovak Environment Agency, he was responsible for the topic of Sustainable consumption and production, while also representing Slovakia’s circular economy activities in Brussels and organising an international conference for Eco-innovation. He is a graduate of the University of Economics, where he focused on International economic relations.
Tadeáš Kula
CEO and founder of Reknihy
CEO and founder of Reknihy
Tadeáš Kula is the CEO and founder of the startup Reknihy. It is a digital platform that allows people to efficiently sell books lying unused in their library. Tadeáš is a web designer, which, apart from UX, is his primary speciality. He started his business career very early – at the age of 13 when he managed and owned popular game servers. As a teenager, he was still creating websites or participating in the expansion of FaceUp abroad. Tadeáš gifted the creation of Reknihy as his 22nd birthday gift to himself. As he says, it was born out of his own need to send his books out so that someone else could be enriched by them and save the environment at the same time.
Radek Hartman
Member of the Board of Directors
Member of the Board of Directors
Graduating from the Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University, Prague, Radek further completed an MBA program specializing in strategic and change management at the Sheffield Business School. He has held managerial positions at companies including Arthur Andersen, MONDI Štětí, Cap Gemini, CE WOOD, U & SLUNO, and Ernst & Young Czech Republic.
