Background
Data & AI Leadership|Coldwater Data LLC

I build the systems that make enterprise data actually work.

McKinsey Manager. Data & AI Director. From intake to automation to AI enablement—end-to-end. 24 years of military leadership. Bronze Star recipient.

Nathan Westby

About

I build the systems and governance that make enterprise data actually work—end-to-end, from intake to automation to AI enablement. At McKinsey & Company, I own operations for a strategic client activation program, governing intake, workflow, automation, and performance metrics across 129+ active client communities.

I spent 24 years in the Army National Guard, including combat deployments to Iraq and Afghanistan and command of units up to 106 soldiers. That experience taught me how to lead under pressure, make decisions with incomplete information, and build teams that execute in complex environments.

My work sits at the intersection of data governance, operational systems, and AI enablement. I bring strategic thinking, technical fluency, and the ability to influence without authority—across C-suite stakeholders, engineering teams, and cross-functional organizations.

24+

Years Military Service

$8M+

Revenue Uplift Delivered

100K+

Client Institutions Governed

Experience

2025 — Present

Founder

Coldwater Data LLC

Founded an independent consulting practice focused on data strategy, AI enablement, and governance for enterprises seeking to become genuinely AI-enabled.

Data StrategyAI EnablementConsultingGovernance
2022 — Present

Manager, Client Data Operations & AI Enablement

McKinsey & Company

Own McKinsey's internal client data systems—managing governance, operations, and AI enablement for the firm's 100K+ institution client master data platform. Built AI agents in Snowflake Cortex and agentic frameworks, reducing manual processing time 40%+. Previously served as Senior Data & AI Governance Consultant advising $5B–$30B enterprises on data governance strategy, delivering outcomes including $8M revenue uplift, $6.5M EBITDA unlocked, and $7.6M productivity improvement. Co-authored McKinsey Digital's technical guide to scaling gen AI.

AI AgentsData GovernanceSnowflakeEnterprise Transformation
2021 — 2022

Data Strategy & Governance Consultant

Caserta (acquired by McKinsey)

Led 18-month capability builds for investment firms. Designed data governance operating models, served as solution architect for AWS cloud data platforms, and built clients' data functions from zero to fully staffed organizations.

AWSData StrategySolution ArchitectureOperating Models
2020 — 2021

Director of Information Governance & BI

IEWC

Directed data governance, BI, marketing, and e-commerce functions. Operationalized data governance program contributing to $850K reduction in operational risk. Streamlined customer quoting from 3 days to 6 hours.

Data GovernanceBusiness IntelligenceProcess Optimization
2014 — 2020

Senior Manager, Data Governance & MDM

Clarios / Johnson Controls

Directed global data governance across 6 regions. Improved critical data quality index from 62% to 98%. Established multi-domain master data governance framework for a $6.7B global business unit.

MDMGlobal OperationsSAP MDGData Quality
1990 — 2014

Commander / Major

Army National Guard

24 years of progressive military leadership. Commanded 106-soldier Cavalry Reconnaissance Troop and 28-soldier mobile public affairs unit. Combat deployments to Iraq and Afghanistan. Bronze Star Medal recipient.

Combat LeadershipUnit CommandStrategic PlanningOperations

Projects

Selected work in AI, data strategy, and enterprise transformation

Enterprise AI Agent Platform
Architected a multi-agent system for automating complex business workflows. Integrated LLMs with enterprise data sources to enable natural language querying and automated decision-making.
Outcome:40% reduction in manual processing time
LangChainGPT-4PythonAzure
Data Strategy Transformation
Led a comprehensive data strategy engagement for a Fortune 100 retailer. Defined data governance frameworks, established data product ownership, and created a 3-year roadmap.
Outcome:$200M+ in identified value creation
Data StrategyGovernanceExecutive Advisory
Predictive Maintenance ML System
Built an end-to-end machine learning pipeline for predicting equipment failures in manufacturing. Deployed on AWS with real-time inference capabilities.
Outcome:25% decrease in unplanned downtime
Machine LearningAWSIoTPython
GenAI Knowledge Assistant
Developed a RAG-based assistant that enables employees to query internal documentation and policies using natural language. Implemented guardrails for responsible AI use.
Outcome:10,000+ queries processed monthly
RAGVector DBOpenAIEnterprise AI

Writing

Thoughts on AI, leadership, and building things that matter

Coming Soon
Coming Soon: Thoughts on Enterprise AI Adoption
Why most enterprise AI initiatives fail—and what leaders can do differently. Drawing from real-world experience delivering AI at scale.
Coming Soon
Coming Soon: From Military Leadership to Tech
Lessons from 24 years in the Army that translate directly to building and leading technical teams in high-stakes environments.
Coming Soon
Coming Soon: The Data Strategy Playbook
A practical framework for developing data strategy that actually gets implemented. No buzzwords, just what works.

Blog launching soon. Check back for articles on AI, data strategy, and leadership.

Beyond Work

What keeps me moving when I'm not solving data problems

Cycling

Cycling

Road cycling and gravel riding keep me balanced. There's something about covering miles under your own power that clears the mind and builds resilience.

Sports Fishing

Sports Fishing

Time on the water is time well spent. Whether fly fishing a mountain stream or chasing bass, it's where I recharge and find perspective.

Coaching Baseball

Coaching Baseball

Helping young athletes develop their skills and love of the game. Leadership isn't just in the boardroom—it's on the diamond too.

Surf fishing at dawn

The best ideas come when you step away from the screen.

Get in Touch

Whether you want to discuss a potential collaboration, have questions about AI and data strategy, or just want to connect—I'd love to hear from you.