Our Team
Founder & General Partner
A longtime cybersecurity investor and operator, Chenxi brings over 25 years of experience across enterprise technology and venture investing. She previously served as Chief Strategy Officer at Twistlock (acquired by Palo Alto Networks) and held leadership roles at Intel Security and Forrester Research. She currently serves on the board of a Fortune 500 company and is the Founder of Forte, a nonprofit advancing women in technology and leadership.
David B. Cross
Venture Partner
A veteran CISO and cloud security executive, David currently serves as CISO at Atlassian and previously held senior security leadership roles at Oracle, Google, and Microsoft. He partners with founders to translate security strategy into enterprise-scale execution.
A seasoned finance and operating executive, Mark brings over two decades of experience leading strategy and scale for venture-backed SaaS companies. He has guided companies through acquisitions and public market milestones, with prior leadership roles at SPI Dynamics (acquired by HP), SecureWorks (acquired by Dell), and Model N (NYSE: MODN).
Daniyal Chawro
Investor
An investor focused on early-stage enterprise technology, Daniyal contributes to sourcing and thematic research across Rain Capital’s cybersecurity, AI, and health technology investments. His prior experience at Mentors Fund and in investment banking informs a disciplined analytical approach and an expanding network within founder ecosystems across the U.S. and Middle East.
Sidra Ahmed Lefort
Venture Partner
An experienced health technology and cybersecurity investor focused on regulated and enterprise markets, Sidra previously served as Investment Director at Munich Re Ventures. She partners closely with founders at the intersection of risk, technology, and industry transformation, with a focus on enterprise adoption and global partnerships.
Dr. David Brumley
Venture Partner
A leading cybersecurity researcher and entrepreneur, David is Chief AI & Science Officer at Bugcrowd and Professor at Carnegie Mellon University. As co-founder and former CEO of Mayhem Security, he pioneered automated vulnerability discovery. His work spans offensive security, AI, and cyber-physical infrastructure protection.
Charisse Castagnoli
Counsel
A legal and privacy advisor with over three decades of experience in technology and information security, Charisse advises founders on governance, compliance, regulatory strategy, and data privacy across complex enterprise environments.
Candice (Yi) Luo
Chief of Staff
A systems thinker with a background in computational linguistics and early-stage startups, Candice works at the intersection of technology and venture strategy. At Rain Capital, she oversees fund operations and platform development, supporting investment processes and portfolio engagement alongside the General Partner.