Fundraising Fox

Sebastian Fischer

Founder

Founder and CEO at Wardstone

Los Angeles Metropolitan Area

FoundedWardstone · YC

About

Sebastian Fischer is cofounder and CEO of Wardstone, a space defense company. He brings over a decade of engineering and product experience from roles at Amazon Prime Air, Cruise Self-Driving, Lockheed Martin, and NASA on planetary spacecraft, with an aerospace engineering degree from MIT and dual MS/MBA from Harvard.

Founder and CEO at WardstoneYC F25

Intro paths

YC

Sebastian 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, Sebastian can intro founders to Wardstone's investors below.

Wardstone's investors · 1

Y CombinatorSan Francisco · $500K checks · since 2025

Co-founders at Wardstone

TFTobias Fischer
Tobias FischerFounder

Experience

  1. WardstoneChief Executive Officercurrent2025 — presentEl Segundo, California, United States
  2. CruiseSenior Systems Engineer II2023 — 2025
  3. AmazonSenior Systems Engineering Manager2021 — 2023Seattle, Washington, United States
  4. AmazonAerospace Systems Engineer, Prime Air2015 — 2019Seattle WA
  5. MIT Department of Earth, Atmospheric and Planetary SciencesUndergraduate Research2011 — 2015
  6. Lockheed MartinAssembly, Test, Launch Operations - Intern2013 — 2014Littleton, CO
  7. NASA Goddard Space Flight CenterPlanetary Magnetospheres Laboratory - Intern2011 — 2012Greenbelt, MD
  8. University of California, BerkeleyJunior Specialist2009 — 2010Berkeley CA

Skills & more

Team ManagementStrategic PlanningGerman5Matlab4Java2Python2Python (Programming Language)1Drones1Project ManagementIndustrial EngineeringSystems EngineeringFinancial Modeling
+12 morePhysical ModelingUser Experience (UX)Autonomous VehiclesAerospace EngineeringProgrammingThermodynamicsIDL programmingPlanetary ScienceMagneticsClean RoomsMagnetometerClassical Mechanics

Languages German

  • Private Pilots License with Complex Endorsement — Federal Aviation Administration

From Sebastian's professional profile.

Frequently asked questions

Who is Sebastian Fischer?
Sebastian Fischer is cofounder and CEO of Wardstone, a space defense company. He brings over a decade of engineering and product experience from roles at Amazon Prime Air, Cruise Self-Driving, Lockheed Martin, and NASA on planetary spacecraft, with an aerospace engineering degree from MIT and dual MS/MBA from Harvard.
Where does Sebastian Fischer work?
Sebastian Fischer is Founder and CEO of Wardstone.
What companies did Sebastian Fischer found?
Sebastian Fischer founded Wardstone.
Where did Sebastian Fischer go to school?
Sebastian Fischer studied at Massachusetts Institute of Technology (Bachelor of Science (BS), Aerospace); Harvard Business School (Master of Business Administration - MBA); Harvard John A. Paulson School of Engineering and Applied Sciences (Master of Science - MS, Engineering Sciences).

Founder mafias

Y Combinator mafia8,773

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Massachusetts Institute of Technology mafia546

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Harvard Business School mafia323

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Cruise mafia34

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Lockheedmartin mafia16

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Same school

Also attended Massachusetts Institute of Technology1,387

Fred WilsonCo-founder & Partner at Union Square VenturesElad GilSolo general partner investing through Gil CapitalAileen LeeFounder & Managing Partner of Cowboy VenturesHemant TanejaCEO & Managing Director of General CatalystNat FriedmanCo-lead of Meta Superintelligence Labs; co-founder of NFDGBrad FeldCo-founder of Foundry and Techstars

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Brad GerstnerFounder & CEO of Altimeter CapitalAileen LeeFounder & Managing Partner of Cowboy VenturesTim DraperFounder of Draper AssociatesMamoon HamidPartner at Kleiner PerkinsNeeraj AgrawalGeneral Partner at Battery VenturesHristo BorisovCo-founder & CEO of Payhawk

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Also attended Harvard John A. Paulson School of Engineering and Applied Sciences18

Bruno TrivelliInvestment Analyst at VI PartnersAsh PanchangSenior Associate at Bling CapitalShangda XuVenture Partner at Andreessen HorowitzZiZi ZhangInvestor at Bow CapitalIñaki ArangoAssociate at Romulus CapitalBruno OyagueAnalyst at Salkantay Ventures

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Shared employers

Also worked at Wardstone1

Tobias FischerFounder at Wardstone

Also worked at Amazon645

Apoorva MehtaFounder of Instacart; founder of Cloud Health SystemsBinny BansalCo-founder of Flipkart; co-founder of PhonePe and OppDoorBrad PorterFounder & CEO of Collaborative RoboticsJane MooneyCo-founder & VP, Strategy and Finance at Collaborative RoboticsNick FrosstCo-founder of CohereDave MunichielloInvestor at GV (Google Ventures)

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Also worked at MIT Department of Earth, Atmospheric and Planetary Sciences1

Jity WoldemichaelFounder at Osmaura

Also worked at Lockheed Martin107

Manny StockmanManaging Partner at Osage University PartnersJeff BabioneSenior Advisory Board at IronGate Capital AdvisorsAlexander WortmannPartner at TCVShalanda ArmstrongManaging Partner at 100Km Ventures LlcDan MoskowitzInvestor at Third Point VenturesDanny CotterManaging Partner at The Westly Group

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