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Sean O'Brien

Investor

Co-founder & Managing Partner at Overline · Board director at Resultid · Board director at BreachRX

Atlanta, Georgia

Writes $250K – $1.5M checks · typically $875K

Find your path to Sean

2,512 people in our graph share verified history with Sean — schools, employers, funds. One of them is your warm intro.

Dave BlivinunlockedSean: together at Techstars (2023)
×10Sean: together at Techstars
Sean: together at Endeavor

About

Sean brings 28 years of experience in investment banking, hedge fund management, and corporate strategy. As President and Chief Strategy Officer at PGi he led over 30 acquisitions and helped drive the company's private-equity exit, and he mentors at Techstars Atlanta and Endeavor Atlanta.

Contact· self-published, not guessed

Board director at Resultid

Intro paths

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In turn, Sean can intro founders to Resultid's investors below.

Resultid's investors · 4

Bantam GroupWestwood · since 2022OverlineAtlanta · $250K – $1.5M checks · since 2022TechstarsBoulder · $220K checks · since 2022TMVNew York · $1.5M checks · since 2022

Co-founders at Resultid

SB
Sifron BenjaminExecutive Officer, Director

Board director at BreachRX

Intro paths

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In turn, Sean can intro founders to BreachRX's investors below.

BreachRX's investors · 6

Ballistic VenturesSan Francisco · $1M – $5M checks · since 2021OverlineAtlanta · $250K – $1.5M checks · since 2024Sandalphon CapitalChicago · $100K – $2M checks · since 2021SYN VenturesWest Palm Beach · since 2021Syn Ventures Seed Management LlcWest Palm Beach · since 2021VentureSouthGreenville · since 2021

Co-founders at BreachRX

ALAnderson Lunsford
Anderson LunsfordExecutive Officer, Director

Experience

  1. Overline VCManaging Partnercurrent2019 — presentAtlanta Metropolitan Area
  2. OffloadBoard Membercurrent2026 — present
  3. Parsel, Inc.Board Membercurrent2025 — present
  4. PickleheadsBoard Membercurrent2024 — present
  5. HomegrownBoard Membercurrent2024 — present
  6. HopDriveBoard Membercurrent2020 — present
  7. The Zero ProofBoard Membercurrent2022 — present
  8. Resultid.aiBoard Membercurrent2021 — present
  9. Carpool LogisticsBoard Observercurrent2023 — present
  10. ServeScapeAdvisory Board Membercurrent2024 — present
  11. TechstarsAll Star Mentorcurrent2017 — presentAtlanta Metropolitan Area
  12. GrayscaleBoard Observer2022 — 2026
  13. BreachRxBoard Member2021 — 2025
  14. EndeavorAdvisory Council2024Atlanta, Georgia, United States
  15. EndeavorMentor2018 — 2024Atlanta Metropolitan Area
  16. MakeswiftBoard Member2020 — 2023Atlanta, Georgia, United States
  17. DrivablyAdvisor2019 — 2021
  18. VITAL4Advisor2019 — 2021Atlanta Metropolitan Area
  19. BigTeamAdvisor2018 — 2020Atlanta Metropolitan Area
  20. Enduro Capital PartnersManaging Director2018 — 2019Atlanta Metropolitan Area
  21. Sawa.aiAdvisor2018 — 2019Atlanta Metropolitan Area
  22. PGiPresident, Strategic Initiatives & Chief Strategy Officer2003 — 2018
  23. Boru Capital ManagementFounder & Managing Partner2001 — 2003
  24. Lindzon Capital ManagementPortfolio Manager2000
  25. SunTrust Equitable SecuritiesVice President1992 — 1999

Skills & more

Webinars9Fundraising7Entrepreneurship49Competitive Analysis32Public Relations5Social Media11Event Management1Start-ups8New Business Development6Business Development10Marketing Communications1Event Planning1
+12 moreFinancial ModelingProgram ManagementCustomer ServiceMarketingProject ManagementNon-profitsBusiness StrategyMarketing StrategyStrategic PlanningStrategyLeadershipPublic Speaking

From Sean's professional profile.

Investments

Investor

AcclinateFranzyGrubbly FarmsHomegrownLevangie Laboratories, Inc.PickleheadsPress Sports AppResultid.aiSemilla Co. (Flou / Seed Academy)The Zero Proof

Per curated public sources.

Colleagues at Overline

Michael Cohn
Managing Partner at Overline

Network1

Christopher Klaus
Partner at Cyberlaunch

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

Frequently asked questions

Who is Sean O'Brien?
Sean brings 28 years of experience in investment banking, hedge fund management, and corporate strategy. As President and Chief Strategy Officer at PGi he led over 30 acquisitions and helped drive the company's private-equity exit, and he mentors at Techstars Atlanta and Endeavor Atlanta.
Where does Sean O'Brien work?
Sean O'Brien is Co-founder & Managing Partner at Overline and Board director at Resultid and Board director at BreachRX.
What check size does Sean O'Brien write?
Sean O'Brien typically writes checks of $250K – $1.5M.
What companies has Sean O'Brien invested in?
Investments tracked here include Acclinate, Franzy, Grubbly Farms, Homegrown, Levangie Laboratories, Inc., Pickleheads, Press Sports App, Resultid.ai, Semilla Co. (Flou / Seed Academy), The Zero Proof.
Where did Sean O'Brien go to school?
Sean O'Brien studied at New York University (BS, Politics); High School for the Performing and Visual Arts (Diploma, Instrumental Music).

Same school

Shared employers