Forward Deployed AI Engineer · Machine Learning

PRESTON GRINSTEAD

I build machine-learning systems that live inside your product —
and I can explain them to the board.

LAS VEGAS, NV · OPEN TO IN-OFFICE IF LOCAL See the work ↓
Preston Grinstead in front of a Las Vegas mural
Las Vegas, NV — the city that runs on probability.
0+ years across ops, sales & data
0 sample projects shipped end-to-end
0.833 AUC — win-prob model, unseen seasons
0 Monte Carlo samples per ensemble run

Selected Work — 2025 → 2026

Five projects.
Every one ships.

Each project has a public repo, reproducible code, and — where it counts — a live demo you can click. No slides.

01 — Flagship

Suzuka // Telemetry & Predictive Line

A physics-based ideal racing line computed on real Suzuka circuit geometry, wrapped in a 4,096-sample Monte Carlo uncertainty band and rendered as a live 3D CesiumJS experience — delta heatmap ribbon above the track, timeline scrubbing, camera tracking, WebSocket LIVE mode.

  • 102.93 s ideal lap
  • 312 km/h top speed · 3.88 g longitudinal
  • 4,096 MC samples in ~6 s on one RTX 4090

Python · PyTorch/CUDA · CesiumJS · FastAPI · Docker · Monte Carlo

02 — Geospatial · Probability

Where Is Flight MH370?

Bayesian grid search plus ocean-drift simulation to estimate where the plane most likely is. Radar constraints, satellite handshake times, and confirmed debris finds feed a posterior over the southern Indian Ocean — drift calibrated on Réunion, validated against the Mozambique find.

  • Top cell 34°S 94°E — inside ATSB's unsearched area
  • Drift model passes within 732 nm of the Maputo debris find
  • Doppler scoring vs published BFO arcs 2–6

Bayesian inference · Geodesy (WGS84) · Ocean drift · Python

03 — End-to-end pipeline

NFL Win Probability & High-Leverage Plays

Full pipeline over 221,000 plays (2015–2025): play-by-play data cleaned to parquet, situation features into a win-probability model, then ranking the plays that actually moved games. Baseline logistic regression is fully reproducible; the tuned ensemble stays in a gitignored config.

  • AUC 0.833 on unseen 2024–25 seasons (baseline 0.828)
  • 221k plays · fetch → clean → parquet, one command
  • Top-leverage play-calling analysis by coach & QB

XGBoost · Feature engineering · Parquet pipeline · Reproducible ML

SHAP summary chart showing the top drivers of SaaS churn predictions

04 — Explainable ML

SaaS Churn Radar

Predict which B2B SaaS customers will churn — and why. XGBoost with proper cross-validation, SHAP explanations a non-technical VP can read, and per-account risk scores in a Streamlit app. It's the mirror of my career: customer success plus predictive analytics.

  • AUC 0.728 with honest CV
  • Top drivers: days_since_login · usage_trend_3m · seat_utilization
  • Per-account SHAP waterfall — the "why" in one screen

XGBoost · SHAP · Streamlit · Customer LTV

LIVE DEMO

05 — Local LLM agents

Closed-Loop AI G-Code Optimizer

A local LLM agent iteratively rewrites a Haas VF-2 program while a PyTorch physics evaluator checks every block against the machine's real spindle torque curve and axis acceleration limits. The loop runs until the toolpath is feasible — then keeps the fastest version it ever found, not just the last one. No cloud: Ollama serves the model locally.

  • Cycle time 6.19 → 2.98 min on a deliberately bad CAM export
  • Peak spindle utilization 180.6% → 94.2% of envelope
  • Infeasible blocks 8 → 1 · sustained MRR doubled

LLM agents (Ollama/Qwen3) · PyTorch · CNC physics · Closed-loop optimization

About

The gap between
the model and the business.
I work in it.

"Finally, a people person who knows tech."

Most ML projects die in the gap between the model and the business. I work in that gap. As a forward-deployed engineer I embed where the problem actually lives — building local LLM pipelines, custom CRMs, and offline-first AI for clients who can't send their data to the cloud.

Before the models: fifteen years of operations, sales, and consulting. Running a Glass Doctor location, closing warranties at CarMax, leading B2B teams at Leadium. That's where I learned what "done" costs, who signs off on it, and why a model nobody can explain is just an expensive spreadsheet.

MBA from ASU W.P. Carey. Postgraduate data-science certificate from Caltech. Based in Las Vegas — the city that runs on probability.

Machine Learning Engineering

Models that survive contact with production: proper cross-validation, honest baselines, explainability built in.

Forward Deployment

Local LLMs, custom CRMs, offline-first AI. I ship where the client's constraints are — not where my comfort zone is.

Data Storytelling

SHAP waterfalls a VP can read in ten seconds. Heatmaps that make a LinkedIn feed stop scrolling.

Business Fluency

MBA, fifteen years in sales and ops. I know what "done" costs — and who has to sign off on it.

Experience

Track record,
not just titles.

Sep 2026 — Present · Las Vegas, NV

Topmountaineer AI Forward Deployed Engineer

  • Built a fully custom in-house CRM from the ground up — MySQL-backed calendar, email sequencing, drag-and-drop stages, deal creation — then layered AI on top so the whole system runs local and offline.
  • Fine-tuned and deployed an agent-based AI engine that turns each week's podcast into client-facing newsletters and internal training content.
  • Shipped a single social-media portal for creating and posting across LinkedIn, Instagram, and other platforms.
Sep 2023 — Apr 2026 · Las Vegas / Remote

Leadium Senior SDR & Trainer → Technical Manager, Sales Development & Customer Success

  • Led sales-development and customer-success teams for AI startups and Fortune 500 clients; go-to-market strategy built on ML models that gauge market interest in real time.
  • Drove a 4× connect-rate lift after FCC rule changes using predictive analytics over B2B outreach data.
  • Trained and coached incoming SDRs on data-driven outreach across multiple tech accounts.
Apr 2024 — Aug 2024

TargetLink (division of Leadium) Co-Founder & Technical Customer Success Manager

  • Bridged technical AI solutions and client success for B2B accounts — translating models into outcomes clients could measure.
May 2022 — Feb 2023 · Las Vegas, NV

Wyndham Destinations Account Manager

  • Built a data-driven presentation system in Microsoft Teams (SQL / Python / R): +40% customer engagement, +8% close rate.
2011 — 2021

Before the models

  • Glass Doctor® — General Manager & Owner (part-time, 2019–2021). Facebook campaign under $0.01 per customer interaction.
  • CarMax — Sales & Finance Consultant (2018–2020). Warranty close rate over 80% vs a 55% President's Club benchmark.
  • Hall Ambulance Service — EMT / Critical Care Technician, Bakersfield CA (7.5 years in 911 response).
  • Interactive Capital — Co-Founder & Managing Partner (2011–2015). Two data platforms, Edmunds API integration.

Arizona State University — W.P. Carey School of Business

MBA · Finance, Marketing & Supply Chain Management (2017–2019)

Caltech

Certificate in Data Science — postgraduate program

Certifications

Deep Learning with TensorFlow · Python for Data Science · R Programming for Data Science · HubSpot Sales Software · NAASE

Contact — Las Vegas, NV · Remote (US)

Let's ship
something.

preston.career@gmail.com
Grab my résumé