Amazon growth.
No retainers.
No agency spin.

I’m Brett Lemker, a 19-year e-commerce operator and former Amazon agency founder. I help brands scale profitably with data, precision, and systems built on contribution margin, not guesswork.

Tired of being pitched by an agency’s “Head of Growth” only to be handed off to a junior account manager who puts your account on autopilot? I work directly with you, no handoffs, no layers, no fluff. Just profit-driven strategy built on contribution margin.

Book a Consultation

View Services

A man with a beard and short brown hair stands with hands in pockets, wearing a light-colored, long-sleeve button-up shirt with sleeves rolled up.

Network of interconnected hexagons and squares outlined in orange on a black background.

Brands advised

300+

Revenue managed

$500m

Years of experience

19

A split screen with a large black rectangular area on top, and two white rectangular boxes below with black borders, separated by a small black rectangle.

Silhouette of a woman holding a microphone, standing behind a podium, addressing an audience at a conference or event.

A black and white silhouette of people in a group with some holding hands.

Black background with white text that says "Weird Al" Yankovic.

Black background with white text that reads "Blue Dog Bakery" in the center.

Black background with a white rectangular banner in the center.

A circuit board with various electronic components such as resistors, capacitors, and connectors.

Black and white image of a white rectangular box with rounded corners and a shadow, containing text that is not legible.

Black background with white text that reads "GoodBelly PROBIOTICS".

A black-and-white image of a person wearing a hat and glasses, sitting at a desk with a computer, in an office environment.

Black background with white text that says 'The truth'

Why Trust Ajarro?

Experience that actually builds profit.

Every brand is different and so is every engagement. Whether you need a few high-impact hours or a dedicated strategic partner, Ajarro adapts to your stage, your goals, and your pace.

Work with me by the hour, or choose discounted 8-hour or 40-hour packages for deeper engagement. No retainers. No lock-ins. Just precise, operator-level execution when you need it.

In short, if there is a single service or “item” you need completed within the list of services, that is 100% doable.

Please note: I only take on a handful of clients at one-time so I can provide them with the attention and time they deserve; therefore, it’s highly probable I’ll go on a waitlist.

Every strategy, forecast, and audit is designed to protect one thing: your margin.

Learn more

The Anti-Agency Philosophy

Agencies overpromise, underdeliver, and hide behind dashboards.

They chase vanity metrics instead of contribution margin, leaving you with bloated spend and empty results.

Brett Lemker replaces all that with profit-first strategy, transparent analytics, and direct operator execution. No retainers. No middle layers. No fluff.

“Brett isn’t just a consultant, he’s a partner who connects every decision to profitability.”