Microgravity - Team Tumbleweed

Access to space, as easy as mailing a package.

Fly to space with us

for as little as €10k and join us in our mission to make access to space as easy as mailing a package.

Our vision.

Bringing a radically accessible solar system closer to our home planet.

At Team Tumbleweed, we are building on 8+ years of heritage in the space industry. We want to enable anyone with a big idea to use low-earth-orbit and its microgravity conditions as a platform for groundbreaking innovation, while developing the core competences needed to reach for Mars and beyond.

In an industry plagued by bureaucracy, long lead times, and staggering project cost, we are building a unique, end-to-end offering, tailored to the needs of researchers, manufacturers, and engineers.

Making human ingenuity flourish in space, for the benefit of life on Earth.

Our team.

Leonhard Goliasch

BizDev Lead

Lenny has a Master’s degree in Strategy, Innovation, and Management Control from WU Vienna, and has spent 5 years volunteering at Team Tumbleweed. Utilizing his extensive knowledge on operations and business development, as COO/CXO, he is in charge of optimizing the customer journey and making sure Tumbleweed Microgravity not only builds fancy technology, but a customer centric service offering that creates tremendous value. He is also responsible for ensuring continued operational efficiency of the organization.

Julian Rothenbuchner

Team Lead

Julian has built Team Tumbleweed, a Mars-rover volunteer research organization, from a garage to an international organization with currently over 55 members all over the world, successfully achieving numerous technical milestones, completing ESA Business Incubation Center Austria and publishing over 20 papers. He has a combined aerospace engineering and business educational background. As CEO, he is in charge of external communication, utilizing his strong network in the European Space Industry to build lasting relationships with agencies, partners, suppliers and customers, as well as prototyping electronics and systems engineering.

Guillaume Brault

RnD Lead

Guillaume is a space engineer with extensive experience working for space industry primes such as Thales Alenia, Rocket Lab – as part of the EscaPADE Mars mission team, and HyprSpace. As CTO, Guillaume leads the technical implementation of solutions in both software and hardware.

Leonhard Goliasch

COO

Julian Rothenbuchner

CEO

Guillaume Brault

CTO

Gaia Lucrezia Dalla Pria

Customer Relations

Gaia, with her solid foundation across multiple scientific domains and a growing record of scientific publications, brings a rare combination of scientific depth, interdisciplinary insight, and system-level thinking. This unique blend of research experience and operational awareness is essential for advancing high-impact science in space environments, where innovation, precision, and reliability are critical.

Sabin Ilegitim

Electrical Engineer

Sabin holds a Bachelor’s degree in Aerospace Engineering and has a background in space engineering and software. He has been a dedicated volunteer with Team Tumbleweed for three years, during which the team developed and tested weekly iterations of prototypes for the Tumbleweed Mars Rover. With seven years of experience in designing and building robots, he is proficient in rapid prototyping and hardware testing. Within the team, he is responsible for the design, development, and validation of electronic systems, ensuring they perform reliably in the demanding space environment.

Lucas Cohen

Certification and Mechanical Engineer

Lucas has demonstrated strong leadership as Head of Engineering & Chief DDM Engineer at Team Tumbleweed since 2019. His expertise includes systems engineering, project management, and problem resolution, driving key projects such as the development of the wind-driven Mars rover and the Deployment Demonstrator Mission (DDM). His experience makes him a key figure in ensuring Tumbleweed Microgravity’s continued contribution to innovative space exploration.

Lucas Cohen

Certification and Mechanical Engineer

Gaia Lucrezia Dalla Pria

Customer Relations

Sabin Ilegitim

Electrical Engineer

Rui Horstink

Manufacturing and Mechanical Engineer

Rui is a versatile and driven Research Precision Engineer with a background spanning complex prototyping, biotechnology, and aerospace. At TU Delft, he contributed to the development of CubeSats as part of a prestigious student Dream Team, gaining hands-on experience in spacecraft systems and collaborative engineering. His professional work included building advanced prototypes in high-tech startup environments and supporting innovations like 3D-printed personalized medication. Rui brings a broad technical perspective, strong hands-on engineering skills, and a deep commitment to building functional, tested hardware for complex applications across industries.

Johanna Sturm

Grants and Ecosystems

With experience in corporate innovation management and a background in public sector innovation, Johanna has led countless requirement-, ideation- and technology-scouting workshops, introducing stakeholders ranging from shop floor employees to executive boards to innovative new ideas. Her experience in technology strategy and cross-industry collaboration enables her to be a guiding figure in both market research and ensuring Tumbleweed Microgravity’s continued contribution to (inter-)national strategic goals.

Efe Uğurlu

Technical Working Student

Efe Uğurlu is a curious and driven Space Engineering master’s student at TU Delft, building on his Aerospace Engineering bachelor’s degree from the same university. His experience spans Electrical Power Subsystem design of a technology demonstration satellite for his bachelor graduation project, as well as research on monopropellant micropropulsion, space tug orbit optimization, and launch systems at Fergani Space. Beyond engineering, his interests extend to space science; his published work on dark matter density modeling during high school reflects his broad research perspective and analytical mindset. Efe is passionate about optimization and brings technical depth, creativity, and cross-disciplinary curiosity to advancing space technologies.

Rui Horstink

Manufacturing and Mechanical Engineer

Johanna Sturm

Grants and Ecosystems

Efe Uğurlu

Technical Working Student

Thijs van den Heuvel

Avionics Intern

Thijs van den Heuvel is a student Aerospace Engineering at TU Delft. He has been active at Team Tumbleweed’s volunteer team building skills in entry vehicle analysis, trajectory modeling, and computational fluid dynamics using OpenFOAM. Thijs has a long history in software engineering in various programming languages, and a diverse employment history in the technical field, including high-tech clean room environments. The combination of responsibility, hands-on experience and analytic skill make him a versatile team member.

Serdar Kaan Yazici

Technical Working Student

Serdar Kaan Yazici is a Spacecraft Development Engineer with a background in aerospace engineering. At TU Delft, he gained practical experience by building and testing rocket engines with a student rocketry team and by contributing to an aerodynamics research project focused on computational fluid dynamics and experiment design. He has also worked on feed system design for medium-scale rocket engines at a space startup. Serdar’s work combines spacecraft design with propulsion, with a focus on creating effective systems for space applications.

Thijs van den Heuvel

Avionics Intern

Serdar Kaan Yazici

Technical Working Student

Our partners.

Oh my god I looooove this, super cool wow!!!!

Some BodyCEO of Everthing

Super cool, these people seem like they know what they're doing

Another PersonCTO

Space ! Love it

MeAstronomy BSc

Access to space, as easy as mailing a package.

Fly to space with us

Our vision.

Bringing a radically accessible solar system closer to our home planet.

Making human ingenuity flourish in space, for the benefit of life on Earth.

Our team.

Our partners.

Interested?