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Ted Schlein

Ted Schlein

Partner and Advisor·Kleiner Perkins

Bio

Professional summary

Ted Schlein is a Partner and Advisor at Kleiner Perkins. His official profile emphasizes enterprise and cybersecurity investments, including companies in security orchestration, fraud prevention, supply-chain risk, authentication, defense and customer data infrastructure. Public cybersecurity and conference profiles describe him as a leading cybersecurity investor with a venture career spanning decades at Kleiner Perkins. Public sources also identify him as a General Partner at Ballistic Ventures, while the input role and firm association here are preserved as provided. His investments have helped define major security categories, including threat intelligence, application security, fraud prevention and security automation.

Investment focus

Stage, sector, and overall fit

Stage

Early stage

Sector

CybersecurityEnterprise softwareDefense technologyInfrastructure and risk management

Thesis

Cyber defense and security infrastructureEnterprise infrastructure and softwareFraud prevention, authentication and security automation

Notable companies

Selected portfolio companies the partner has backed

ArcSightMandiantPhantomShape SecurityCarbon BlackAlienVaultLifeLockSegmentSynackApiiroInteros

How to approach

Framing and angles for outreach

Pitch framing

Lead with a security-first thesis grounded in a real enterprise or national-security pain point, not a generic software pitch. The strongest angle is a differentiated technical approach to cyber defense, fraud, identity, security automation, supply-chain risk or resilient infrastructure.

Personalization hooks

  1. 1Reference his long-standing focus on cybersecurity and enterprise software.
  2. 2Connect your security category to precedents such as ArcSight, Mandiant, Phantom or Shape Security.
  3. 3For defense or national-security-adjacent companies, mention the overlap with Rebellion Defense or Ballistic Ventures only if directly relevant.

Recent signals

What the partner has said or done recently

  • RSA Conference profile describes him as a leading cybersecurity investor and lists multiple successful cybersecurity investments.

  • Ballistic Ventures profile describes a cybersecurity career spanning more than 40 years and a 30-year venture career at Kleiner Perkins.

Other partners at Kleiner Perkins

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Joubin Mirzadegan

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Leigh Marie Braswell

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Leigh Marie Braswell is a Partner at Kleiner Perkins whose official profile lists enterprise AI investments including Applied Compute, Avoca, Bun, Nooks, Windsurf and Reevo. Public profiles describe her as focused on infrastructure and ML application founders, with prior experience at Founders Fund and Scale AI.

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Lucas Oliveira

Lucas Oliveira

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KP principal investing in enterprise software, cybersecurity and AI companies.

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Mamoon Hamid

Mamoon Hamid

Partner

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Mamoon Hamid is a Partner at Kleiner Perkins with a portfolio that includes enterprise AI, enterprise software and healthcare AI companies. His official profile lists investments including Figma, Glean, Rippling, Applied Intuition, Netskope, Ambience Healthcare, Databricks and Moveworks.

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Moustafa ElBialy

Moustafa ElBialy

Chief Information Officer

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CIO at Kleiner Perkins leading technology, AI, data and cybersecurity operations.

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