Grace Cimaszewski
FounderFounder at Crosslayer Labs
New York, New York, United States
FoundedCrosslayer Labs · YC
Find your path to Grace
1,239 people in our graph share verified history with Grace — schools, employers, funds. One of them is your warm intro.
About
Grace Cimaszewski holds a PhD from Princeton and has conducted security research on TLS certificate security, contributing to standards adopted by the CA/Browser Forum. She previously held research positions at Google and Corelight Labs before founding Crosslayer Labs with fellow researchers.
Founder at Crosslayer LabsYC W26
Intro paths
Grace went through Y Combinator (Winter 2026) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Tyler Bosmeny, General Partner at Y Combinator — the partner who ran Crosslayer Labs's batch and knows the company first-hand. YC profile ↗
In turn, Grace can intro founders to Crosslayer Labs's investors below.
Crosslayer Labs's investors · 1
Co-founders at Crosslayer Labs
Experience
- Crosslayer LabsFounder, CTOcurrent2025 — presentSan Francisco Bay Area
- CorelightResearch Intern2022 — 2025
- Princeton UniversityGraduate Student Researcher2020 — 2025
- GoogleStudent Researcher2025New York, United States
- Mysten LabsResearch Intern2024
- Reservoir LabsSoftware Engineer2019 — 2020New York City Metropolitan Area
- Goldman SachsSoftware Engineer2019New York City Metropolitan Area
- Capital OneSoftware Engineer2018 — 2019
- Reservoir LabsSoftware Engineering Intern2017New York, United States
- Reservoir LabsSoftware Engineering Intern2016New York City Metropolitan Area
- Stony Brook UniversitySummer intern2013
Skills & more
Languages French · Japanese
From Grace's professional profile.
Frequently asked questions
- Who is Grace Cimaszewski?
- Grace Cimaszewski holds a PhD from Princeton and has conducted security research on TLS certificate security, contributing to standards adopted by the CA/Browser Forum. She previously held research positions at Google and Corelight Labs before founding Crosslayer Labs with fellow researchers.
- Where does Grace Cimaszewski work?
- Grace Cimaszewski is Founder of Crosslayer Labs.
- What companies did Grace Cimaszewski found?
- Grace Cimaszewski founded Crosslayer Labs.
- Where did Grace Cimaszewski go to school?
- Grace Cimaszewski studied at Y Combinator (W26); Princeton University (Doctor of Philosophy - PhD, Electrical and Computer Engineering); Cornell University (Bachelor of Science (B.S.), Electrical and Computer Engineering).
Founder mafias
Y Combinator mafia10,230
Also came through, then founded or led a company.
+ 10,223 more
Cornell mafia535
Also came through, then founded or led a company.
+ 528 more
Goldman Sachs mafia531
Also came through, then founded or led a company.
+ 524 more
Capital One mafia39
Also came through, then founded or led a company.
+ 32 more
Mysten Labs mafia4
Also came through, then founded or led a company.
Same school
Also attended Y Combinator2,000
+ 1,994 more
Also attended Princeton University998
+ 992 more
Also attended Cornell University1,413
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Shared employers
Also worked at Crosslayer Labs1
Also worked at Corelight10
+ 4 more
Also worked at Princeton University164
+ 158 more
Also worked at Google2,000
+ 1,994 more