Strategy Built for Execution

Strategy That Drives Growth —
and Aligns Leadership.

MTZ Advisory partners with retail and consumer leaders to unlock growth, strengthen profitability, and drive operational excellence. We combine deep industry experience with top-tier consulting discipline — and translate complex strategy into clear, executive-level communication that drives alignment and action.

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What We Do

Where MTZ Advisory Can Help

Tailored engagements for retail and consumer executives — built around your most important strategic priorities.

Growth Strategy & Portfolio Design

3–5 year strategic planning
Portfolio optimization
Channel strategy
Category & assortment architecture
Scenario modeling & financial forecasting

Retail & Consumer Operations

Merchandising transformation
Inventory optimization
S&OP & integrated business planning
Process redesign
Margin expansion initiatives

Marketing, Loyalty & Customer Strategy

Loyalty program redesign
Personalization roadmap
Promotions optimization
Digital growth strategy
Customer lifecycle economics

Private Equity Value Creation

Pre-acquisition commercial diligence
Post-acquisition 100-day planning
Value creation roadmap design
Executive interim leadership
EBITDA acceleration initiatives

Executive & Strategic Communication

CEO & C-suite presentations
Board & investor strategic presentations
Internal company storytelling materials
Partnership strategy documents
Marketing & brand communications

How We Work

A Differentiated Perspective

01 — Industry Depth

Operator Experience

Deep understanding of retail merchandising, loyalty economics, digital performance, inventory, supply chain, and product development — built through years of operating leadership, not just advisory work.

02 — Consulting Rigor

Structured Problem-Solving

Hypothesis-driven analysis, financial modeling, and executive-ready storytelling — forged at McKinsey and applied across every engagement to deliver clarity, not complexity.

03 — PE Mindset

Value Creation Focus

A relentless focus on EBITDA, capital efficiency, and tangible value creation — with the discipline to prioritize what moves the needle and the experience to know how.

MTZ Advisory combines the strategic clarity of a top-tier consulting firm with the accountability of an operator.

20+Years in Industry

About

An Operator and a Strategist

Sari Martinez is a senior retail and consumer executive with experience spanning global strategy consulting, private equity portfolio operations, and executive leadership within growth-stage and enterprise retailers.

She has served as Vice President of Strategy at Thinx, Vice President of Marketing Strategy & Loyalty at Saks Fifth Avenue, SVP of Merchandising & Planning at Rhone Apparel, and Vice President of Operations at L Catterton. She began her career at McKinsey & Company, where she was an Engagement Manager in the Apparel, Fashion & Luxury Goods practice and recipient of the Marvin Award for leadership and innovation.

Across roles, she has led enterprise-wide strategy, loyalty and personalization transformation, merchandising and inventory optimization, private equity value creation, and digital growth initiatives.

Her unique blend of operating depth and consulting discipline allows MTZ Advisory to bridge vision and execution.

Track Record

Select Professional Experience

MTZ Advisory, LLC

Independent advisory to retail and consumer brands on go-to-market strategy, digital growth, and strategic transformation.

Thinx

Led 3-year strategic plan and portfolio rationalization; improved margins by 10 ppts and doubled inventory turns.

Saks Fifth Avenue

Led loyalty program; managed marketing budget; drove fraud reduction and retention improvement. Developed Barneys at Saks operating model; served as main liaison with Authentic Brands Group from initial deal closure in 2019 through online and store launches in 2021.

Rhone Apparel

Led selection and implementation of new third-party tools, including Product Lifecycle Management, Supply Chain Management, and Integrated Reporting platforms.

L Catterton Portfolio Operations

Served in day-to-day operator roles across portfolio companies to ensure value creation and investment thesis obtainment.

McKinsey & Company

Engagement Manager, Apparel, Fashion & Luxury practice. Developed pricing tools unlocking 3–7% margin improvement; led merchandising capability transformations. Recipient of the Marvin Award for leadership and innovation.

Gap Inc.

Drove triple-digit category growth and +8 ppt profitability improvement.

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