AI engineer · Operator · Builder

I build AI systems that turn complexity into momentum.

I'm Leo Walker — an AI engineer with a Ranger's instinct for execution and a data scientist's eye for signal. I've been building with NLP since 2016. Today I turn hard, ambiguous problems into practical systems teams can actually move on — currently in clinical AI at KaiCare.ai.

  • 75th Ranger Regiment
  • MS Data Science · University of Denver
  • Early NLP builder, since 2016
  • KaiCare.ai
  • MLOps Community

The through-line

Precision from the military. Pattern recognition from data. Practical systems from AI.

Different chapters, one habit: take something complex and make it move. Here's the arc — and what each part taught me about doing the work.

  1. The Regiment

    75th Ranger Regiment

    Where I learned that standards are not negotiable and that a plan only matters if it survives contact. Precision, ownership, and calm under load — the operating habits everything since has been built on.

  2. Data & NLP

    Analytics and early NLP

    I followed the data — into energy and venture capital — and got hooked on language models before they were fashionable. The lesson: the hard part is rarely the model, it's framing the right question and trusting the signal.

  3. Graduate study

    MS, Data Science — University of Denver

    Formalized the pattern recognition. Statistics, ML, and the discipline to tell a real result from a comfortable one. I came out caring less about novelty and more about systems that hold up.

  4. AI engineering

    Building practical AI systems

    Agents, LLM composition, evaluation, and the unglamorous plumbing that makes them dependable. Good AI engineering is mostly judgment about what to automate, what to verify, and what to leave to a human.

  5. Now

    Clinical AI at KaiCare.ai

    Remote patient monitoring and care-management systems where the stakes are real. It's the current proving ground for the same principle: turn messy complexity into something a team can actually move on.

Selected work

What I build

All projects

Agentic workflows

Agent skills, tools, and MCP integrations that hold up in production — not demos. Built around clear contracts and verifiable steps.

  • Agents
  • MCP
  • Tooling

LLM systems

Composition, evaluation, and observability for language-model applications that stay reliable under real load.

  • LLMs
  • Evals
  • Python

Clinical AI · KaiCare.ai

Remote patient monitoring and care management — AI applied to the messy realities of care delivery, where correctness and trust matter most.

  • Healthcare
  • RPM/CCM
  • Production

Writing & ideas

Thinking out loud

Notes on clinical AI, NLP, agent workflows, and the long road from the military to building software. Active ideas — more landing here over time.

Talks & series
Notes

What reliable agent workflows actually require

Contracts, verification, and the boring scaffolding that separates a demo from a system you'd trust on call.

Coming soon
Series

Coding Agents Lunch & Learn — MLOps Community

An ongoing series on building effectively with coding agents: tooling, workflows, and what holds up in practice.

Read more
Essay

From the Regiment to the repo

How military operating principles — standards, ownership, after-action honesty — translate to leading engineering work.

Coming soon

Working on something hard?

If you're building something where practical AI could move the needle — or you just want to compare notes — I'd like to hear about it.