🎤 Join our founder group to hear from firms like NEA on What it takes to raise a Series A?

Register
Don Sullivan

Don Sullivan

Administrative·Greylock

Bio

Professional summary

Don Sullivan leads Greylock's operational, financial and administrative functions. He joined Greylock in 2000 after serving as chief financial officer of Wildfire Communications, where he worked on private financings, strategic relationships and Wildfire's acquisition by Orange. Earlier, he was finance vice president at SQA and finance director at CrossComm, and he worked at Ernst & Young with early-stage technology companies.

Background

Career, education, and skills

Career history

  • GreylockAdministrative2000 – Present
  • Wildfire CommunicationsChief Financial Officer2000
  • SQAFinance Vice President
  • CrossCommFinance Director
  • Ernst & YoungEarly-stage technology company specialist

Education

  • Assumption CollegeB.A. in Finance

Other partners at Greylock

12 more profiles

Allie Dalglish

Allie Dalglish

Business Operations

Greylock

Greylock business operations leader managing firm initiatives and strategic projects.

Business operationsEquity researchFirm operationsInvestor relationsStrategic projects
Asheem Chandna

Asheem Chandna

Partner

Greylock

Greylock partner focused on enterprise, cybersecurity, infrastructure software, and AI-enabled security operations.

CybersecurityEnterpriseInfrastructure software
BH

Bill Helman

Advisory Partner

Greylock

Greylock advisory partner and former managing partner with technology and health care investing experience.

board governanceconsumer internetearly-stage technologyhealth careventure capital
DS

David Strohm

Venture Partner

Greylock

Greylock venture partner known for DoubleClick, OpenDNS, SuccessFactors and other enterprise investments.

early-stage investingenterprise softwarefinancial technologyinfrastructuresoftware
Jason Risch

Jason Risch

Partner

Greylock

Greylock partner investing in cybersecurity, AI and next-generation software.

artificial intelligencecybersecurityenterprise softwarefintechinfrastructure
Jeff Markowitz

Jeff Markowitz

Advisory Partner

Greylock

Greylock Advisory Partner focused on executive hiring and succession.

Executive hiringExecutive searchLeadership successionTalent strategyVenture portfolio support
Jerry Chen

Jerry Chen

Partner

Greylock

Greylock partner focused on ambitious enterprise software founders.

AICloudDataEnterprise software
Lee Haney

Lee Haney

Partner, Customer Development

Greylock

Greylock customer development partner connecting founders with enterprise technology leaders.

customer developmententerprise salesfounder supportgo-to-markettechnology leadership
Mike Duboe

Mike Duboe

Partner

Greylock

Greylock partner focused on growth-minded investments in commerce, marketplaces, and vertical software.

CommerceGrowth‑focused early stageMarketplacesVertical software
Mor Chen

Mor Chen

Partner

Greylock

Greylock partner backing Israeli cybersecurity and enterprise AI founders.

cybersecurityearly-stage investingenterprise AIIsraeli startupspre-seed
Neiman Mathew

Neiman Mathew

Partner

Greylock

Greylock partner working with pre-idea and early technical founders.

AI for sciencedeep techpre-idea foundersroboticstechnical founders
Reid Hoffman

Reid Hoffman

Partner

Greylock

Greylock partner, entrepreneur, and investor known for LinkedIn, PayPal, Facebook, Airbnb, and network-driven businesses.

AIConsumerMarketplacesNetwork‑effects businessesNetworks