Polygraf AI, the company redefining AI security for critical operations, today announced the appointment of Darren Lee to its Board of Directors. Lee brings decades of enterprise cybersecurity leadership experience, including senior executive roles at Proofpoint, where he helped scale global threat protection, identity defense, and compliance security platforms used by regulated organizations worldwide.
Lee’s appointment comes as Polygraf AI continues its rapid growth following major industry recognition, including being named “Most Innovative AI Usage Control for Security and Compliance” at the Global InfoSec Awards during RSA Conference 2026, and securing a core U.S. patent for its Content Source Detection AI technology.
“Darren understands where cybersecurity is going – not just where it’s been,” said Yagub Rahimov, CEO of Polygraf AI. “As AI becomes the primary attack surface, security and governance can’t be an afterthought – it has to be engineered. Polygraf’s AI Behavioral Control Plane does exactly that, and Darren’s track record of scaling category-defining platforms makes him the right partner for us to help shape this market.”
During his 14-year tenure at Proofpoint, Lee served in multiple executive leadership roles, most recently as Executive Vice President and General Manager of the Threat Protection Business. In that role, he led global teams building and scaling technologies across email security, identity protection, human risk management, threat intelligence, and digital compliance. His leadership directly shaped enterprise security platforms deployed globally across financial services, healthcare, government agencies, and other highly regulated sectors.
“Organizations today face a fundamental shift in how AI introduces risk into enterprise systems — and most security architectures weren’t built to handle it. Throughout my career in enterprise security, the hardest problems were always about enforcing control at the point of exposure, before damage occurs,” said Lee. “ Polygraf AI is addressing exactly that challenge: delivering trust, visibility, and accountability at the moment of AI interaction. I’m excited to help the company scale that capability to the organizations that can least afford to get it wrong.”
Polygraf AI delivers preemptive, on-premise enforcement of data protection and compliance controls through its proprietary compute-lite AI Behavioral Control Plane, enabling organizations to detect and prevent sensitive data exposure across AI tools, enterprise workflows, and user environments. Its edge-AI architecture uses proprietary Small Language Models (SLMs) that run entirely on local hardware with as little as 1.3 GHz CPU and 40MB of RAM, eliminating the need to send data externally. This minimal energy footprint cuts operational & infrastructure costs by removing reliance on expensive cloud GPUs, while delivering a more sustainable alternative to carbon-intensive Large Language Models (LLMs).
The company’s recently launched Desktop Overlay extends these capabilities directly to desktop endpoints with zero integration requirements, providing real-time guidance that prevents data leakage before it occurs.
Lee’s addition to the Board strengthens Polygraf AI’s strategic leadership at a time when enterprises are accelerating AI adoption across mission-critical operations. His deep background in enterprise cybersecurity product development, governance technologies, and large-scale SaaS security platforms aligns closely with Polygraf AI’s focus on enabling safe and auditable AI deployment across regulated industries.
ABOUT POLYGRAF AI
Headquartered in Austin, Texas, Polygraf AI is redefining AI security for critical operations. Polygraf’s proprietary, premise-agnostic Small Language Model (SLM) technology helps critical operations teams detect and mitigate AI risks – from data leakage and compliance violations to deepfakes and synthetic content – using local, explainable, and auditable AI solutions.
Visit https://polygraf.ai/ to learn more.
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