Drew Brosnan

I’m the CMO who writes the SQL, so I catch a bad number before your board does.

Paid media, lifecycle, and the attribution that proves which of it worked. I grew Macy’s paid channels to a billion a year in attributed revenue, helped take Redbubble public, and today I’m interim CMO at Bluethumb, Australia’s art marketplace.

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I’m the CMO who writes the SQL, so I catch a bad number before your board does. Paid media, lifecycle, and the attribution that proves which of it worked. I grew Macy’s paid channels to a billion a year in attributed revenue, helped take Redbubble public, and today I’m interim CMO at Bluethumb, Australia’s art marketplace.

Two minutes with Drew

The short version, in two minutes.

Who I am, what I build, and the kind of problem that makes me pick up the phone. Two minutes, in my own words.

Transcript

I’m Drew Brosnan. I’m the CMO who writes the SQL, so I catch a bad number before your board does. Here’s the short version. I run growth marketing and the technology underneath it. The paid media that brings customers in. The lifecycle programs that keep them. And the data plumbing that tells you which of it actually worked. At Macy’s, I grew the paid channels to a billion dollars a year in attributed revenue. At Redbubble, I scaled the shopping feeds by two thousand percent, to tens of millions of products. I built machine-learning bidding before the platforms offered it. I cut more than half a million dollars a year from the martech stack. Then we took the company public. At Net32, I built the company’s first marketing-mix model and lifted brand share of voice twenty-two percent in six months, through an acquisition. Today I’m fractional CMO at Bluethumb, Australia’s art marketplace. The rare part is that I build the measurement myself. I trained as an engineer. I write the SQL, model the attribution, and stand up the ETL. So when a number looks wrong, I catch it before it reaches a board deck. Fewer opinions. More evidence. The problem that makes me pick up the phone? You’re spending real money on marketing and nobody can say, with confidence, which half is working. Or your board is asking a question your dashboards can’t answer. If that sounds familiar, get in touch. I’m open to senior marketing roles and to fractional or interim CMO work. Everything is at drewbrosnan dot com, and I read every message myself.

Exhibit I A short introduction: the work, the numbers, and how I run a marketing org.
  • $1B Tracked revenue a year Macy’s paid channels, 2015
  • 5B+ Products tracked Redbubble catalog coverage
  • +2,000% Shopping-feed scale To tens of millions of products
  • +22% Brand share of voice Net32, in six months
  • >$500K Saved per year Redbubble, a 37% contract cut
  • IPO Public listing Redbubble, on the ASX

The retrospective

Portfolio

7 rooms, one per employer, each with the projects done there and the numbers behind them.

  1. Room II: the examination 2023 to 2024

    Marketing that survived due diligence

    Net32.com · Marketing Director

    I ran marketing for a dental-supply B2B marketplace through 33% annual revenue growth and the venture diligence that ended in its acquisition by Riverside Partners.

    33% annual revenue growth
  2. Room III: the persistence of inventory 2016 to 2023

    Seven years, one IPO, 5 billion products

    Redbubble (later Articore) · Marketing Performance Manager to Marketing Director

    Seven years scaling an artist marketplace through its public listing, with search and feed campaigns grown to roughly 40% of daily gross transaction value.

    41% YoY marketplace revenue growth in the Director era
  3. Room IV: the escalator ascends 2014 to 2016

    A billion dollars, attributed

    Macys.com · Marketing Acquisition Manager

    A team of three, $30M a year in spend, and attributed revenue grown 10% to $1B for 2015 across search, display, retargeting, and product listing ads.

    $1B attributed revenue for 2015, up 10% YoY

Walk all 7 rooms →

Landscapes of work

Work

  1. Bluethumb

    VP Marketing, then Interim CMO

    2023 to Present

    Remote (US and Australia)

    Roles held

    1. 2023 to 2025 VP Marketing
    2. 2025 to Present Interim CMO
    • Interim CMO
    • Brand & performance
    • AI creative
    • Marketplace
    • P&L ownership

    Interim CMO for Australia’s art marketplace: monthly spend scaled from $100K to $400K through the holiday peak, with AI-personalized creative lifting conversion about 20%.

    • Scaled the full marketing P&L from $100K to $400K a month through the Q4 holiday peak.
    • Rebuilt positioning, messaging, value props, and brand voice, with a visual refresh across creative system, photography, and design language.
    • Shipped AI-generated, personalized 1:1 product-feed graphics at scale, millions of images, for about a 20% conversion lift over standard creative.
    • Roughly doubled creative output velocity with no performance degradation, under human-in-the-loop review and privacy protocols.
    • Consolidated four messaging tools into Klaviyo and cut martech licensing costs about 25%, leading six in-house marketers and five agency members across two agencies.
    Enter the room: Bluethumb →
  2. Net32.com

    Marketing Director

    2023 to 2024

    San Francisco, CA

    • Marketing-mix modeling
    • Attribution
    • Lifecycle
    • ETL
    • Team leadership

    I ran marketing for a dental-supply B2B marketplace through 33% annual revenue growth and the venture diligence that ended in its acquisition by Riverside Partners.

    • Built the company’s first marketing-mix model and the ETL behind it, unifying more than ten ad-publisher sources.
    • Presented marketing positioning and performance to the board and M&A teams during venture-capital due diligence; the acquisition by Riverside Partners closed.
    • Ran a verified-supplier brand campaign, video-first across YouTube, CTV on MNTN, Criteo, and Meta: brand share of voice up 22% in six months, measured by survey.
    • Grew lifecycle LTV 20% quarter over quarter for six months on Klaviyo and Attentive SMS.
    • Launched server-side Google Tag Manager, optimized a 50,000-product catalog across Google and Facebook, and moved project management from Monday.com to Jira on an agile kanban system.
    Enter the room: Net32.com →
  3. Redbubble (later Articore)

    Marketing Performance Manager to Marketing Director

    2016 to 2023

    San Francisco, CA

    Roles held

    1. 2016 to 2018 Marketing Performance Manager
    2. 2018 to 2019 Senior Marketing Manager
    3. 2019 to 2023 Marketing Director
    • Search & feed
    • Shopping / PLA
    • ML bidding
    • Google Marketing Platform
    • IPO scale

    Seven years scaling an artist marketplace through its public listing, with search and feed campaigns grown to roughly 40% of daily gross transaction value.

    • Moved the channel from fully agency-run to hybrid in-house at 20% YoY revenue growth from 2016 to 2018, doubled the team, and led the European market launch: UK, Germany, Spain, and France, plus the Canada expansion.
    • Launched analytics covering 80% of sellable products, more than 5 billion SKUs, via server-side and client-side Google Tag Manager.
    • Co-built ML bidding and product-scorecard algorithms with a doctoral data scientist, scoring more than 100 million products on performance signals.
    • Scaled shopping feeds 2,000%, from tens of thousands to tens of millions of products, across Google Merchant Center, Facebook Catalog, Criteo, GDN, and Yahoo dynamic product ads at 3B+ SKU scale.
    • Consolidated GA360, SA360, CM360 and DV360, and Productsup across Redbubble and TeePublic: 37% contract savings, more than $500K a year.
    Enter the room: Redbubble (later Articore) →
  4. Macys.com

    Marketing Acquisition Manager

    2014 to 2016

    San Francisco, CA

    • Paid search
    • Product listing ads
    • $30M budget
    • Adobe Analytics
    • Python

    A team of three, $30M a year in spend, and attributed revenue grown 10% to $1B for 2015 across search, display, retargeting, and product listing ads.

    • Grew attributed revenue 10% YoY to $1B for 2015 across paid search, display, retargeting, and product listing ads.
    • Led the Marin to Kenshoo bid-management migration: SEM SaaS cost down 30%, delivered on the holiday deadline.
    • Automated creative testing across roughly 250,000 creatives.
    • Moved Macy’s into Google and Bing shopping ads while optimizing the existing text and display channels.
    • Wrote Python for supply-chain inventory and intraday cost dashboards.
    Enter the room: Macys.com →

The apparatus

Capabilities

The architecture of decisions

Leadership & Strategy

  • Building and mentoring marketing teams
  • Fiscal budgeting and quarterly projections
  • Marketing strategy and prioritization
  • Data-driven decision-making
  • Executive dashboards (Mode, Looker, Data Studio)
  • Board and investor reporting through IPO and M&A

Media that compounds

Paid & Lifecycle Media

  • Paid search and SEM
  • Shopping and PLA at 5B-SKU scale
  • Display and CTV (Criteo, GDN, DV360)
  • Social (static, video, dynamic product ads)
  • Lifecycle (Klaviyo, Attentive SMS)
  • SEO

The plumbing behind the numbers

Marketing-Technology & Data

  • Marketing-mix modeling and multi-touch attribution
  • Analytics (GA360, GA4, CM360, Adobe, Coremetrics)
  • Tag management (server and client GTM360)
  • ETL and warehousing (Fivetran, Snowflake, Sigma)
  • Feed management (Productsup, Feedonomics)
  • Customer data platforms (Segment)

The machine in the studio

AI & Technical

  • Generative creative at scale (Midjourney, DALL-E, OpenAI, Claude)
  • ML bidding and product scoring, built before platform AI
  • Prompt frameworks and human-in-the-loop governance
  • Agentic workflows with Claude Code
  • SQL, Python, and RegEx
  • Server-side tagging and data pipelines
  • Google Cloud ML Engineer certification

A soft watch, on schedule

I run marketing like an engineer, because I trained as one.

I lead growth marketing and the technology under it: the paid media that brings customers in, the lifecycle programs that keep them, and the data plumbing that tells you which of it actually worked. I have run Macy’s search budget, scaled Redbubble’s shopping feeds through its path to a public listing, directed marketing at Net32 through its acquisition, and serve as interim CMO, on a fractional basis, for Bluethumb, Australia’s art marketplace.

The rare part is that I build the measurement myself. I write the SQL, model the attribution, and stand up the ETL, so when a number looks wrong I catch it before it reaches a board deck. I studied computer science engineering, and it shows in how I run a marketing org: fewer opinions, more evidence.

Currently Alongside Bluethumb, I am co-building Emergent Solutions, a fractional CTO and CFO consultancy with an open-source-first go-to-market stack. emergentsolution.com

Exhibit pending: The studio, in two minutes
Exhibit II How I run a marketing org: the dashboards, the SQL, and the weekly rhythm.

Let’s compare notes

Get in touch

I am open to senior marketing roles and to fractional or interim CMO work. Email me, or find me on LinkedIn. I answer everything.