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Sybil Grieb

Investor

Principal at Pitbull Ventures

Los Angeles, California

Writes $100K – $5M checks · typically $1.5M

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Ask Brad Zions to introduce you to Sybil

You →Brad · together at Pitbull Ventures →Sybil

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About

Sybil Grieb brings over 20 years of experience in business development, strategy, and operations across roles as founder, department head, and individual contributor. Her background includes positions at Whalar, Edelman, Crunchyroll, Xfire, and ZAM Network, where she worked on revenue growth and account management. She currently serves on the Associates Board at 826LA, a nonprofit organization offering tutoring, creative writing workshops, and publishing programs for underserved students.

Experience

  1. 826LAAssociates Boardcurrent2026 — present
  2. Career Breakcurrent2025 — presentLos Angeles, California
  3. WhalarSVP Business Development2022 — 2025Los Angeles, California, United States
  4. 100HatsCEO2019 — 2022Los Angeles
  5. EdelmanSVP, Head of Influencer Marketing2017 — 2019Greater Los Angeles Area
  6. William Morris EndeavorHead of Digital Influencer and Brand Integrations2015 — 2017Beverly Hills, CA
  7. CrunchyrollHead of Digital Advertising Sales2013 — 2015San Francisco Bay Area
  8. XfireVP of Digital Advertising Sales & Ad Operations2012 — 2013Greater Los Angeles Area
  9. Affinity Media - ZAM Network (Acquired by TenCent)Head of Business Development, Ad Sales & Ad Operations2005 — 2010Los Angeles, California

Skills & more

Brand PartnershipsMarketing Strategy1Business Strategy2Digital MarketingInfluencer MarketingOnline Advertising54Online Marketing16Strategic Partnerships47Generating Revenue2Monetization18Video Games14Competitive Analysis7
+12 moreOnline GamingAdvertisingDigital MediaDigital StrategyAd ServingAdvertising SalesBusiness DevelopmentStart-upsStrategic PlanningCRMMobile DevicesMobile Advertising

From Sybil's professional profile.

Colleagues at Pitbull Ventures

Brad Zions
General Partner at Pitbull Ventures
Bradley J. Zions
General Partner at Pitbull Ventures

Network1

Brad Zions
General Partner at Pitbull Ventures

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

Frequently asked questions

Who is Sybil Grieb?
Sybil Grieb brings over 20 years of experience in business development, strategy, and operations across roles as founder, department head, and individual contributor. Her background includes positions at Whalar, Edelman, Crunchyroll, Xfire, and ZAM Network, where she worked on revenue growth and account management. She currently serves on the Associates Board at 826LA, a nonprofit organization offering tutoring, creative writing workshops, and publishing programs for underserved students.
Where does Sybil Grieb work?
Sybil Grieb is Principal at Pitbull Ventures.
What check size does Sybil Grieb write?
Sybil Grieb typically writes checks of $100K – $5M.
Where did Sybil Grieb go to school?
Sybil Grieb studied at New York University (Tisch School of the Arts); Mandarin, Shanghai (HSK Level 2); San Francisco State University (B.A., English).

Same school

Shared employers