About

Nate Lee served as CISO at Tradeshift, securing more than half a trillion dollars in global trade, and now advises AI-first software companies.

I'm Nate Lee. I served as CISO at Tradeshift, where I secured a platform processing more than half a trillion dollars in global trade. Today I provide CISO leadership to AI-first software companies.

Nate Lee, CISO

Fractional CISO leadership for AI-first software companies

I work with leadership teams that need experienced security judgment but do not yet need—or cannot justify—a full-time security executive. As a fractional CISO, I help turn customer pressure, regulatory demands, and fast-moving technical risk into a practical security strategy.

That can mean building the security roadmap, preparing for enterprise customers and audits, strengthening engineering and cloud practices, advising the board, or helping the team make sound decisions about AI and agent security. The goal is a program that fits the company: credible, focused, and able to grow with it.

Experience

I've spent more than two decades leading security and technology work in high-growth software companies and large enterprises. As CISO at Tradeshift, I led security for a platform supporting more than half a trillion dollars in global trade and held responsibility across security, reliability, platform engineering, IT, and delivery infrastructure.

I've also advised founders, executives, investors, and engineering leaders; taught and spoken about applied security; and contributed work cited by the Cloud Security Alliance and OWASP. My current focus is helping teams navigate the security realities of software that increasingly depends on models, agents, automation, and rapidly changing infrastructure.

How I help

  • Security strategy, roadmaps, and operating models
  • Enterprise readiness, customer assurance, and audit preparation
  • Cloud, product, and software security
  • AI and agent security
  • Executive, board, and investor guidance
  • Security leadership during growth, transition, or a critical initiative

Work with me

If your company needs senior security leadership that is practical, technical, and aligned with how modern software gets built, email me at nate@cloudsec.ai.