MLMark Lillywhite

Identity security · Privileged access · AI agents

Mark Lillywhite

Enterprise Sales Engineer at Delinea
Securing and governing identity for the AI era

For more than 20 years I've helped enterprises answer one question: who, and increasingly what, can reach their most sensitive systems. Today that means people, service accounts, machine identities and autonomous AI agents, all governed, least-privileged and provable.

20+ yearsEnterprise IT and security pre-sales across the UK, Ireland and EMEA
CertifiedDelinea Certified Engineer and Microsoft Azure Fundamentals
UK & IrelandEnterprise technical sales: discovery, proofs of concept and competitive positioning
Conference speakerECS Europe 2025 and GOVSEC 2024, London

What I do

Discover, control and prove every privilege

I run the technical sales cycle for enterprise customers: discovery, architecture, demos, proofs of concept and competitive positioning. My strength is understanding complex IT estates and mapping a clear path to lower risk and real business benefit, then explaining it clearly to engineers, CISOs and boards alike.

01 · DISCOVER

Find the privilege

Surface privileged accounts, secrets, standing permissions and over-entitled cloud roles across on-premises, cloud and SaaS, including non-human identities and AI agents.

02 · CONTROL

Reduce and govern it

Vaulting, just-in-time access, privilege elevation on servers and endpoints, session recording and zero standing privilege for every identity type.

03 · PROVE

Show it's under control

Give auditors, regulators, boards and cyber insurers clear evidence that privilege is governed, monitored and continuously right-sized.

Expertise

Core skills

Privileged Access Management (PAM)AI agent and NHI securityITDRCIEMPASMPEDMZero TrustZero Standing PrivilegeJust-in-Time accessSecrets managementSession recording and auditSIEM integrationCloud privilege visibilityMicrosoft AzureEndpoint managementSoftware asset managementProofs of conceptExecutive presentations

Point of view

How I think about identity in the AI era

“You can't stop every vulnerability when AI and smart adversaries work together. Protect the access layer and right-size privileges continually.”

On AI-accelerated attacks

“AI is an arms race. Protect what AI can interact with, continuously and at source, because it won't slow down and it will be used unpredictably.”

On securing AI agents

“The best privileged access is frictionless. Use whatever tools you like, with security that's invisible yet ever present.”

On developer and admin experience

Speaking

Recent talks

Enterprise Cyber Security (ECS) Europe, London

Privileged access management and privilege elevation, and how they help organisations meet current cyber compliance and cyber insurance requirements.

Whitehall Media · Convene, 200 Aldersgate

GOVSEC: Government IT Security, London

Securing privileged access across public-sector estates, with a focus on practical controls that satisfy auditors and insurers.

Whitehall Media

All speaking and events →

Working on identity, privileged access or AI agent security?

The quickest way to reach me is a message on LinkedIn.

Message me on LinkedIn