Outsourced CMO · Chief Marketing Officer · E-Commerce Growth Consultant

Your store is running. It should be scaling. I make it happen.

I step in as an outsourced CMO for brands that want to scale their existing e-commerce, go digital from retail, or nail a platform migration — one goal only: drive revenue.

Let's talk about your project → Discover my approach ↓
$100M+
Revenue Generated
x2–x3
Avg. Client Growth
15 yrs
E-Commerce Experience
30+
Projects Delivered
Cumulative Results · Client Portfolio
100 000 000
dollars generated
Response time
<48h
Revenue growth
x2–x3
Target clients
1–10M€
Experience
15 yrs
The Problem

You have everything.
Except someone who actually drives it.

Most stagnating e-commerce brands don't lack tools, traffic, or budget. They lack a driver.

01

Campaigns running… but nobody's steering

Your acquisition channels are live. But nobody's tracking performance week over week or making the calls that actually move the needle on ROI.

02

Data everywhere… decisions nowhere

You have dashboards, GA4, reports. Insights sit in tools. Nothing translates into fast, concrete action. The gap between data and decision is killing your growth.

03

Vendors everywhere… working in silos

Paid search agency, SEO freelancer, dev shop, logistics — each in their own lane, no shared vision. The result: scattered effort and growth that keeps stalling.

04

Recommendations… that stay on paper

You've seen consultants produce polished decks. But between the document and execution, there's a canyon. Nobody's there to turn strategy into numbers.

An e-commerce business doesn't grow on recommendations.
It grows on decisions that get executed.
Google Ads
Search · Shopping · PMax
Meta Ads
Facebook · Instagram · Reels
SEO
Organic · Content · Technical
Email & CRM
Automation · Retention · LTV
Marketplace
Amazon · eBay · Shopify Markets
Conversion
Funnel · CRO · A/B Testing
Affiliate
Partners · Influencers · Comparison
Data & ROI
Tracking · Margins · LTV · CAC
Leadership
Teams · Strategy · Roadmap
Why not an agency?

What others
won't do.

Not a classic consultant, not an agency, not a freelancer. An outsourced CMO is a rare profile — and exactly what your business needs to break through.

Criterion
Classic E-Commerce Consultant
Agency
Outsourced CMO
Involvement
One-shot engagement, minimal follow-up
Multi-client, attention split thin
Laser-focused on your business
Deliverable
Audit, recommendations, document
Partial execution, reporting
Decisions + real execution
Vision
Limited to their specialty
Channel-by-channel silos
Full business picture
Accountability
Accountable for advice, not results
Accountable for their channel KPIs
Accountable for overall growth
End goal
Ship the deck
Renew the contract
Grow your revenue
Methodology

Simple, sharp,
results-first.

No complex process. No endless meetings. I pinpoint what's blocking you, decide with you, and execute.

01

Situation Audit

Full analysis of your business, levers, blockers, and untapped opportunities.

02

Priority Levers

Identifying the 3–5 high-impact actions that will move the revenue needle immediately.

03

Align Together

Every decision is discussed and validated with you. Nothing is imposed.

04

Concrete Execution

Decisions get implemented. No deck collecting dust. Real moves, right away.

05

Track & Iterate

Measure, adjust, optimize continuously. Growth compounds week over week.

Services

I work the levers
that actually move the needle.

Every lever is activated with one goal: grow your revenue sustainably and profitably.

Marketing Strategy & Acquisition

Full CMO vision — from brand positioning to activation levers, with a constant eye on the P&L.

  • Brand positioning and marketing strategy
  • Marketing budget allocation & P&L management
  • Multi-channel activation (Paid, Social, SEO, CRM, Marketplace)
  • Global ROI optimization and CAC reduction

Conversion & Sales Funnel

Every visitor who doesn't buy is money left on the table. I recover it.

  • Key page optimization (home, PDPs, checkout)
  • Conversion rate improvement
  • Behavioral analysis and drop-off identification
  • Real A/B tests and continuous iteration

Data & Business Intelligence

Decisions built on the right data — not vanity metrics that flatter without informing.

  • Reliable, comprehensive tracking setup
  • Operational performance dashboards
  • Business data deep-dive (margins, LTV, CAC)
  • Identifying the highest-ROI actions

Strategy & Team Leadership

I align your vendors and internal teams so everyone pulls in the same direction, toward the same goal.

  • Strategic framing and roadmap
  • Agency, freelancer, and internal team coordination
  • Prioritization and friction management
  • Unblocking everything that's slowing down scale
Projects delivered
30+
↑ E-com · Retail · Replatform
Revenue generated (cumulative)
$100M+
↑ Client portfolio
Client revenue growth
x2–x3
↑ Observed average
Acquisition performance — monthly growth
Use Cases

Three scenarios.
One type of outcome.

Whether you're already live, launching from physical retail, or navigating a platform replatform — the challenge is always the same: protect the business and drive growth.

01
Existing E-Commerce

You're live — but you've hit a ceiling

Your store is running, traffic is coming, campaigns are live. But results have flatlined. Acquisition channels aren't coordinated, data piles up with no action behind it, and nobody's truly driving the business.

What I bring
  • Multi-channel acquisition management (Google Ads, Meta, SEO…)
  • Funnel and conversion rate optimization
  • Team and vendor coordination
  • ROI-driven reporting and decision-making
02
Retail → Online

You sell in stores. You're ready to go digital.

You have a brand, products, loyal customers. But going online is a project in itself — platform, logistics, acquisition, analytics. Done wrong, it's expensive. Done right, it unlocks a new revenue stream.

What I bring
  • Strategic framing and structured launch plan
  • Platform selection and deployment
  • First acquisition channels set up and live
  • End-to-end management through first sales
03
Platform Replatform

You're switching platforms — and you can't afford to get it wrong.

Shopify migration, headless commerce, custom rebuild — changing your tech stack is high-stakes. Mismanaged, you're looking at a traffic crash, conversion collapse, and lost revenue overnight.

What I bring
  • Full project management A–Z (vendors, timeline, budget)
  • SEO and tracking protection throughout migration
  • Functional QA before go-live
  • Post-launch acquisition ramp-up to recover performance
Who is this for?

Is this right for you?
Here's how to know.

I work with a limited number of clients on high-stakes engagements — which means I choose carefully who I work with.

This is for you if
  • You have an active e-commerce and want to accelerate growth
  • You're a mature retail brand ready to launch online
  • You're navigating a platform migration and need it done right
  • You sense untapped potential and want someone who acts on it
  • You want CMO-level expertise without the full-time hire
This is not a fit if
  • You're pre-launch or still validating product-market fit
  • You only want a written recommendations deck
  • You're not ready to move fast on decisions
  • You want to control every micro-decision yourself
Mendy Berrebi
Outsourced CMO · Convertly
About

I don't discover your problems.
I've already solved them.

I'm Mendy Berrebi. 15 years building e-commerce businesses — first in-house, then as an e-commerce consultant and outsourced CMO for ambitious brands across Europe and beyond.

I've helped multiple e-commerce brands double or triple their revenue. Not with audits. With decisions that stuck, campaigns that converted, and teams aligned around a single goal: move the number.

"The real bottlenecks in a scaling e-commerce are never where you think they are."
$100M+
Generated
15 yrs
Experience
x2–x3
Revenue Growth
What people say

Straight from
the people who've worked with me.

"
I had the opportunity to collaborate with Mendy on several e-commerce and digital acquisition challenges. He brings exceptional strategic vision while staying relentlessly results-oriented. He commands the full spectrum — traffic acquisition, conversion optimization, performance management, and customer experience. His ability to rapidly read a situation, identify the priority levers, and execute concrete actions is remarkable. A reliable, deeply committed professional who generates real impact on revenue and profitability.
Judith Halioua Ex Head of Strategy
Nike.com
"
Mendy is an exceptional marketing director specialized in e-commerce. Professional, rigorous, and genuinely a pleasure to work with. I recommend him without reservation.
Emmanuel Bismuth CEO
Client
Next step

Is your e-commerce
actually
being driven?

A free pre-diagnostic to identify what's really blocking your growth — and see if I can help.

Personal reply within 48h I read every submission myself. No templates, no assistant.
100% free pre-diagnostic No commitment. I'll look at your situation together and tell you honestly if I can help.
15 years of hands-on experience $100M+ in revenue managed. Operational CMO — not a consultant.
What happens next
1
I review your submission Within 48h, you get an honest first read from me directly.
2
30-min call If the fit looks right, I schedule a call to go deeper.
3
Tailored proposal If we're aligned, I present an engagement framework built for your situation.
2 slots available · Maximum 5 clients at a time
Prefer to call? +33 6 20 54 18 31
Free pre-diagnostic

Request a time slot

Only submissions that match the scope receive a response.

I prioritize projects in active decision mode.
100% confidential No commitment Reply within 48h
Request received — I'll reply within 48h.