About
Tobias Fischer is cofounder of Wardstone, where he leads technical development of defense spacecraft. He previously worked at Astranis on geostationary communication satellites and studied mechanical engineering at Cornell University, where he served as Chief Spacecraft Engineer on a lunar CubeSat mission.
Founder at WardstoneYC F25
Intro paths
YC
Tobias went through Y Combinator (Fall 2025) — any YC alum in your network can reach them through the YC community.
GP
Their group partner at YC was Garry Tan, President & CEO of Y Combinator — the partner who ran Wardstone's batch and knows the company first-hand. YC profile ↗
→
In turn, Tobias can intro founders to Wardstone's investors below.
Wardstone's investors · 1
Co-founders at Wardstone
SF
Sebastian FischerFounder and CEO
Experience
- WardstoneChief Technical Officercurrent2025 — presentSan Francisco, California, United States
- Astranis Space TechnologiesSpacecraft Engineer2025
- Astranis Space TechnologiesElectrical Integration Engineer2022 — 2025San Francisco, California, United States
- Cislunar ExplorersChief Spacecraft Engineer2021 — 2022Ithaca, New York, United States
- Cislunar ExplorersSoftware Team Lead2020 — 2021Ithaca, New York, United States
- Cislunar ExplorersFlight Software Engineer2020Ithaca, New York, United States
- AstranisAssembly, Integration, & Testing Intern2021San Francisco, California, United States
- CreeEquipment Engineering Intern2020Durham, North Carolina, United States
- Rocket Propulsion Laboratory at UCSBPropulsion Design Engineer2019Santa Barbara, California
Skills & more
Systems EngineeringSystem Integration1SolidWorks7Robotics9Python10Data Analysis3Confocal MicroscopyMachiningLaTeX1Java2Matlab3Team Leadership1
+9 more
Manufacturing ProcessesPublic SpeakingAdditive Manufacturing3D PrintingAutodesk Fusion 360Generative DesignJMPFailure Mode and Effects Analysis (FMEA)Python (Programming Language)From Tobias's professional profile.
Frequently asked questions
- Who is Tobias Fischer?
- Tobias Fischer is cofounder of Wardstone, where he leads technical development of defense spacecraft. He previously worked at Astranis on geostationary communication satellites and studied mechanical engineering at Cornell University, where he served as Chief Spacecraft Engineer on a lunar CubeSat mission.
- Where does Tobias Fischer work?
- Tobias Fischer is Founder of Wardstone.
- What companies did Tobias Fischer found?
- Tobias Fischer founded Wardstone.
- Where did Tobias Fischer go to school?
- Tobias Fischer studied at Cornell University (Bachelor of Science - BS, Mechanical Engineering); Y Combinator; Stanford University (Silicon Valley Innovation Academy, Technology Entrepreneurship).
Founder mafias
Y Combinator mafia8,773
Also came through, then founded or led a company.
Sam AltmanPresidentFounded Tools for Humanity +3Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianYC Summer 2005Founded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded HotspotsTrae StephensYC Winter 2022Founded Pursuit +1
+ 8,766 more
Y Combinator mafia4,716
Also came through, then founded or led a company.
Ryan SheaEntrepreneurshipFounded StacksTarek MansourFounded KalshiSuhail DoshiEating beans & riceFounded Playground +1Subomi OluwalanaW22Founded ConvoyDarius "Bubs" MonsefS19Founded Sightbox +3Matthew ScholzFounded Oisin Biotechnologies +3
+ 4,709 more
Stanford University mafia903
Also came through, then founded or led a company.
Peter ThielJ.D.Founded PayPal +1Reid HoffmanB.S.Founded LinkedIn +2Joe LonsdaleBSFounded Opto +3Mike Maples JrBSFounded Pattern BreakersSteve JurvetsonMSEEFounded Mojo VisionBalaji SrinivasanGraduate StudentFounded Counsyl +1
+ 896 more
Cornell University mafia218
Also came through, then founded or led a company.
John ZimmerBSFounded Lyft +1Ian JanickiBachelors of ArchitectureFounded Outfit +2Ryan XueBachelor of Science (B.Sc.)Founded Andco +2Don MuirDyson School of BusinessFounded Arc +2Uri LopatinBAFounded Pardes Biosciences +1David SteinbergBAFounded Restorbio +1
+ 211 more
UC Santa Barbara mafia61
Also came through, then founded or led a company.
Logan GreenBAFounded Lyft +1Nils ReggeBAFounded Developx +2Michael WitzbaFounded Mob Science +2Brett GibsonBAFounded Slinkset +1Ivan BercovichPhDFounded Unwrap +1Zheng XuPh.D.Founded SolarCity +1
+ 54 more
Same school
Also attended Cornell University748
Doug LeonePartner at Sequoia Capital; former Global Managing PartnerJenny LeeSenior Managing Partner at Granite AsiaNeeraj AgrawalGeneral Partner at Battery VenturesJohn ZimmerCo-founder of LyftMichelle FernandesInvestor at Index VenturesMicah RosenbloomGeneral Partner at Founder Collective
+ 742 more
Also attended Y Combinator2,000
Tarek MansourCo-founder & CEO of KalshiSuhail DoshiFounder of Mixpanel; founder of ParticleSubomi OluwalanaCo-founder & CEO of ConvoyMaroof AhmedFounder at Octopus VenturesJustin SwartPartner at Bitkraft Esports VenturesCollin WallaceGeneral Partner at Lobby Capital
+ 1,994 more
Also attended Stanford University2,000
Peter ThielCo-founder & Partner at Founders FundReid HoffmanCo-founder of LinkedIn; Partner at GreylockDavid SacksCo-founder & General Partner at Craft Ventures; former White House AI & Crypto CzarKeith RaboisManaging Director at Khosla VenturesGarry TanPresident & CEO of Y CombinatorAlfred LinPartner at Sequoia Capital
+ 1,994 more
Shared employers
Also worked at Wardstone1
Also worked at Astranis Space Technologies17
David BeyerPartner at Amplify PartnersJohn GedmarkAdvisor at Commonweal VenturesMo El-BibanyGeneral Partner at Page One VenturesSerik KaldykulovFounder/Managing Partner at ElefundRayyan IslamCo-Founder and General Partner at 8090 IndustriesArnav SahuPartner at Peak XV Partners
+ 11 more