Fundraising Fox

Arthur Karell

InvestorFounder

General Partner at First In · Board director at Any Signal

San Diego Metropolitan Area

Writes $500K – $2M checks

FoundedAny Signal

About

Co-author of First In's investment memo on Hybron.

Invests in

AI & Machine LearningCybersecurityData & InfrastructureDeep TechDefense TechHardware

Board director at Any Signal

Intro paths

→

In turn, Arthur can intro founders to Any Signal's investors below.

Any Signal's investors · 7

Acequia Capital (AceCap)Seattle · $100K – $5M checksBalerion Space VenturesDallasBeyond CapitalSan DiegoBlueYard CapitalBerlin · $500K – $5M checksFirst InWashington · $500K – $2M checksU.S. Air Forcesince 2023Upfront VenturesLos Angeles · $1M – $10M checks · since 2025

Co-founders at Any Signal

JM
John MalsburyExecutive Officer, Director, Promoter
RA
Ricardo Andres MedinaExecutive Officer, Director
JO
Jeffrey OsborneExecutive Officer, Director, Promoter
RM
Ricardo MedinaFounder
RM
Ricky MedinaFounder

Experience

  1. First InGPcurrent2022 — present
  2. AnySignalBoard Membercurrent2024 — present
  3. Anduril IndustriesSenior Legal Counsel & Corporate Development2019 — 2022
  4. FiscalNoteVP Corporate Development & General Counsel2013 — 2019Washington D.C.
  5. Special Operations Joint Task Force- AfghanistanSpecial Operations Forces Advisor Team Leader2011 — 2013Afghanistan
  6. United States Marine CorpsInfantry Officer2007 — 2011United States, Japan, Afghanistan
  7. Willkie Farr & Gallagher LLPAssociate2005 — 2007Washington DC

Education

  1. Harvard UniversityBachelor of Arts (B.A.), Political Science and Government
  2. University of Virginia School of LawDoctor of Law (J.D.), International Law and Legal Studies

Skills & more

Leadership90Intelligence8Business Development31Entrepreneurship34Start-ups33Policy37Government43Operational Planning49Sales Operations18Leadership Development30Sales22Command17
+12 moreMilitaryNational SecurityProgram ManagementMilitary OperationsTrainingCounterinsurgencyAfghanistanForeign AffairsMilitary ExperienceCorporate LawTechnologyCompliance

Languages Dari · French · Spanish

From Arthur's professional profile.

Colleagues at First In

Bobby Tuohy
Advisor, Technology at First In
Brian O'Keefe
Advisor at First In
Brian Schmanske
Advisor, Dual-Use Technology at First In
Claudius E. Watts IV
Senior Advisor at First In
Gabrielle Fong
Senior Associate at First In
Ish Boyle
Advisor, Go-to-Market at First In
Jessica Nelson
Principal at First In
Kevin Uebelhardt
Investor at First In

Frequently asked questions

Where does Arthur Karell work?
Arthur Karell is General Partner at First In and Founder at Any Signal.
What does Arthur Karell invest in?
Arthur Karell invests in AI & Machine Learning, Cybersecurity, Data & Infrastructure, Deep Tech, Defense Tech, Hardware.
What check size does Arthur Karell write?
Arthur Karell typically writes checks of $500K – $2M.
What companies did Arthur Karell found?
Arthur Karell founded Any Signal.

Same school

Also attended Harvard University1,457

Alfred LinPartner at Sequoia CapitalChris DixonFounder & Managing Partner of a16z crypto at Andreessen HorowitzSarah TavelVenture Partner at BenchmarkDanny RimerPartner at Index VenturesLaela SturdyManaging Partner at CapitalGRyan IsonoDeal Partner at Felicis Ventures

+ 1,451 more

Also attended University of Virginia School of Law30

Rob LudwigChief Operating Officer at Hoxton VenturesDon BaerSenior Advisor at Audere CapitalJon FlintFounding Partner at Polaris PartnersRyan FrisbiePartner at VIEWPOINT VENTURESCarrie NixonNixon Gwilt Law at Empactful CapitalStephan DolezalekInvestor at Broadscale

+ 24 more

Shared employers

Also worked at AnySignal1

Jai RelanFounder at Relling

Also worked at Anduril Industries34

Hemant TanejaCEO & Managing Director of General CatalystTrae StephensPartner at Founders Fund and co-founder of AndurilKatherine BoyleGeneral Partner at Andreessen Horowitz (American Dynamism)Paul KwanInvestment Team at General CatalystMark XuInvestor at Index VenturesMichael RobinsonInvestor at Craft Ventures

+ 28 more

Also worked at FiscalNote10

Lia CromwellPartner at UpWestMark BlakeStrategy & Corporate Development Leader at Joyance PartnersCraig BurelGeneral Partner at Reciprocal VenturesSheel TyleFounder and CEO at Amplo VenturesOmar DarwazahManaging Director AAF Management at Taram CapitalConrad YiuPartner at AS1 Growth Partners

+ 4 more

Also worked at United States Marine Corps37

Douglas Lemott Jr.Vice President, SAP National Security Services at Riphean InvestmentsTony WellsVenture Partner at Copper Sky CapitalBeau HigginsVP (OPlign), Senior Client Partner (The Military Veteran) at Context VenturesMike SteadmanFounder, Coach, USNA '10 — writing, coaching, and designing categories for underdog military veteran founders and CEOsGlenn VogelVenture Partner at IronGate Capital AdvisorsBrian CarbaughCo-Founder & CEO, Andesite; Senior Advisor, Cyber & National Security at Red Cell Incubation

+ 31 more