Fundraising Fox

Dean Sysman

InvestorFounder

Venture Adviser at Bessemer Venture Partners · Venture Advisor at AI Fund · Founder at Cymmetria

New York, New York

Writes $5K – $50K checks · typically $25K

FoundedCymmetria · YC

Find your path to Dean

10,962 people in our graph share verified history with Dean — schools, employers, funds. One of them is your warm intro.

Hemant TanejaunlockedDean: together at Y Combinator
×9Dean: together at Y Combinator
Dean: together at Bessemer Venture Partners
Dean: together at University of Haifa

About

Dean Sysman is Executive Chair and Co-Founder of Axonius, a cybersecurity company that reached $2.6 billion valuation and $100 million ARR within five years of its founding, which he led as CEO for nine years. He conducts research at Columbia University at the intersection of systems and artificial intelligence, and serves on the boards of Olakai, Lasso Security, and SecurityScorecard, with an investment portfolio spanning over 20 early-stage companies including three unicorns. Sysman is a graduate of computer science from the Israeli special "Etgar" program and a former captain in the Israeli Intelligence Corps.

Founder at CymmetriaYC S15

Intro paths

YC

Dean went through Y Combinator (Summer 2015) — any YC alum in your network can reach them through the YC community.

→

In turn, Dean can intro founders to Cymmetria's investors below.

Cymmetria's investors · 5

408 VenturesPalo Alto · since 2015Follow[the]Seedsince 2015Lumia CapitalSan Francisco · $25K – $30M checks · since 2015Rally Ventures Management, LlcMenlo Park · $100K – $4M checks · since 2015Y CombinatorSan Francisco · $500K checks · since 2015

Co-founders at Cymmetria

GEGadi Evron
Gadi EvronFounder/CEO

Experience

  1. AxoniusExec Chair and Co-Foundercurrent2026 — presentNew York, New York, United States
  2. AxoniusCEO and Co-Founder2017 — 2026New York City Metropolitan Area
  3. Columbia UniversityPhD Researchcurrent2026 — presentNew York, New York, United States
  4. SecurityScorecardBoard Membercurrent2026 — present
  5. LassoBoard Membercurrent2026 — present
  6. Bessemer Venture PartnersVenture Advisercurrent2026 — present
  7. OlakaiBoard Membercurrent2024 — present
  8. StartupsInvestorcurrent2016 — present
  9. CymmetriaCTO and Co-Founder2014 — 2017Tel Aviv/San Francisco
  10. Israeli Military Intelligence - Unit 8200Research Team Leader2012 — 2014
  11. Israeli Military Intelligence - Unit 8200Technological Researcher2009 — 2012
  12. Integrity Project (acquired by Mellanox Technologies)Software Developer2012Ramat Gan, Israel

Skills & more

C++C

From Dean's professional profile.

Colleagues at Bessemer Venture Partners

Adam Fisher
Partner at Bessemer Venture Partners
Aditya Nidmarti
Investor at Bessemer Venture Partners
Aia Sarycheva
Investor at Bessemer Venture Partners
Alex Ferrara
Partner at Bessemer Venture Partners
Alex Yuditski
Investor at Bessemer Venture Partners
Alexandra Sukin
Senior Associate at Bessemer Venture Partners
Amit Karp
Partner at Bessemer Venture Partners
Anant Vidur Puri
Partner at Bessemer Venture Partners

Network5

Guy PodjarnyScout
Angel
Mickey BoodaeiScout
Partner at Picture Capital
Tamar YehoshuaScout
Investor at IVP (Institutional Venture Partners)
Eran Bielski
Investor at Entree Capital
Peter Barrett
General Partner at Playground Global

Investors connected to Dean in public investor directories — a warm-intro map.

Frequently asked questions

Who is Dean Sysman?
Dean Sysman is Executive Chair and Co-Founder of Axonius, a cybersecurity company that reached $2.6 billion valuation and $100 million ARR within five years of its founding, which he led as CEO for nine years. He conducts research at Columbia University at the intersection of systems and artificial intelligence, and serves on the boards of Olakai, Lasso Security, and SecurityScorecard, with an investment portfolio spanning over 20 early-stage companies including three unicorns. Sysman is a graduate of computer science from the Israeli special "Etgar" program and a former captain in the Israeli Intelligence Corps.
Where does Dean Sysman work?
Dean Sysman is Founder of Cymmetria and Venture Adviser at Bessemer Venture Partners.
What check size does Dean Sysman write?
Dean Sysman typically writes checks of $5K – $50K.
What companies did Dean Sysman found?
Dean Sysman founded Cymmetria.
Where did Dean Sysman go to school?
Dean Sysman studied at Columbia University (Doctor of Philosophy, Electrical and Electronics Engineering); University of Haifa (Bachelor of Science (B.Sc.), Computer Science); The Hebrew Reali School (High School, Computer Science).

Founder mafias

Y Combinator mafia10,218

Also came through, then founded or led a company.

Sam AltmanPresidentFounded Tools for Humanity +3Garry TanPresident & CEOFounded Y Combinator +1Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianAmbassador to the EastFounded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded Paradigm +1

+ 10,211 more

Columbia University mafia441

Also came through, then founded or led a company.

Ben HorowitzBAFounded OpswareChris DixonMaster of Arts - MAFounded Founder CollectiveKai-Fu LeeA.B.Founded 01Kevin M. SlawinB.A.Founded Phoenix SENOLYTIX +4Paul GrossingerMaster of Science; M.SFounded Gaingels +3Robin ChanB.A.Founded Goat Capital +3

+ 434 more

Bessemer Venture Partners mafia32

Also came through, then founded or led a company.

Sharon MeersPartnerFounded Kurbo Health +2Sameer DholakiaPartnerFounded SendGrid +1Kashish GuptaVenture Capital InvestorFounded Hightouch +1Mark LurieVenture InvestorFounded MidaoEthan KurzweilPartnerFounded Linden LabJason FingerEIRFounded Salvo Health

+ 25 more

University of Haifa mafia21

Also came through, then founded or led a company.

Amir FaintuchBAFounded Hourly +1Yarin Didi MeirBachelor of Science - BSFounded Botika +1Tamir CarmiBAFounded ironSourceVicky BooksBAFounded PuresecAvi ShulmanBAFounded PuresecYotam DaganM.A.Founded Dugri

+ 14 more

AI Fund mafia16

Also came through, then founded or led a company.

Ryan HowardVenture AdvisorFounded Practice Fusion +5Andrew NgManaging General PartnerFounded Factored +3Fahad AzizFounder in ResidenceFounded PuppyDog +2Monte ZwebenVenture AdvisorFounded Splice Machine +1Robert SchulteVenture AdvisorFounded Lumatax +1Jennifer WongFounder in ResidenceFounded AI Fund +1

+ 9 more

Same school

Also attended Columbia University1,106

Ben HorowitzCo-founder & General Partner at Andreessen HorowitzDoug LeonePartner at Sequoia Capital; former Global Managing PartnerChris DixonFounder & Managing Partner of a16z crypto at Andreessen HorowitzKai-Fu LeeChairman of Sinovation Ventures and CEO of 01.AIGabriella GiglioHR & Executive Talent at General CatalystScott BillerInvestor at GV (Google Ventures)

+ 1,100 more

Also attended University of Haifa58

Roi Bar-KatManaging Director at Intel CapitalShimon TsentsiperVenture Partner at Key1 CapitalTamir CarmiVenture Partner at PICO Venture PartnersDani GoldsherPartner and CFO at TriventuresAmir FaintuchVenture Partner at PitangoVicky BooksMarketing Director at Grove Ventures

+ 52 more

Also attended The Hebrew Reali School16

Ron GuraCo-founder & CEO of EmpathyYaniv SternCo-Founder, Managing Partner at Red Dot Capital PartnersAyal ItzkovitzManaging Partner | First at PitangoAmir FaintuchVenture Partner at PitangoAsaf AzulayPartner & CMO at Team8Gili FruchterChief of Staff at Meron Capital

+ 10 more

Shared employers

Also worked at Axonius18

Jahanvi SardanaInvestor at Index VenturesKen FoxPartner at StripesBryan GertzogPartner at StripesJohn BrennanFounder & Managing Partner at Holly VenturesYoav LeitersdorfManaging Partner at YL VenturesOfer SchreiberSenior Partner at YL Ventures

+ 12 more

Also worked at Columbia University296

Reid HoffmanCo-founder of LinkedIn; Partner at GreylockRon ZoriVenture Partner at Lerer HippeauRalph DeBernardoPartner, Investor Relations at Sapphire VenturesRichard ChesworthInvestor at Third Rock VenturesJesse Coors-BlankenshipCo-founder, General Partner at Parkway Venture CapitalLauren YoungHead of Platform at AlleyCorp

+ 290 more

Also worked at Startups19

Rishabh KaulVenture Partner at Hoxton VenturesAndy HwangGeneral Partner at Wavemaker PartnersDaniel HaCofounder at Antigravity CapitalZach WaterfieldInvestor at Ripple VenturesAndrea GennariniManaging Partner at 2100 VenturesElizabeth TobeyMarketing Mentor at Lair East Labs

+ 13 more

Also worked at Israeli Military Intelligence - Unit 820072

Sapir HaroshPartner at Third Point VenturesMatan LamdanInvestor at Striker Venture PartnersKeren KenanPartner, Finance & Operations at PICO Venture PartnersOmer KaganowskiAnalyst at Red Dot Capital PartnersTomer DiariInvestor at AlephOr SalomAnalyst at YL Ventures

+ 66 more