Hi, I'm Dionne Mayienga

My best work has always sat at the point where growth starts to get complicated. I came up in financial services and fintech not just as a marketer, but as someone who was always getting pulled into the harder question: not whether we could grow, but how to grow sustainably and in a way that holds together.

Over time, I grew responsible for figuring out which customers matter, how to position to them, and how to translate brand equity into revenue. I’ve led teams that launched across multiple markets in months and hit targets early — because we were deliberate about segmentation and how we showed up in each market.

I built Subena because I kept seeing the same gap: not a shortage of ideas or capability, but the application of retrofitted, imprecise commercial framework that fail to harness that ambition. That’s the gap we close.

Subena Growth Advisory is a boutique commercialization firm that builds integrated growth operating systems for founders and CEOs in fintech, finance and tech expanding across Africa.

We specialize in market entry strategy, commercial architecture, and GTM execution — with particular depth in Kenya and East African markets. Our model is CMO-as-a-Service: embedded senior commercial leadership, without the full C-Suite overhead.

We tailor and activate commercial playbooks, aligning market positioning, acquisition models, monetization logic, and cross-functional execution into one coherent growth engine.

Most CEOs in finance and tech in Eastern Africa don’t have a capability problem. They have a blueprint problem. We exist to solve it.

  • Built for Fintech:

  • Deep specialization in financial services, embedded finance, insurtech, and digital infrastructure across African markets — not generalist advisory.

  • Leadership Without Overhead:

  • C-suite commercial strategy and execution, fractionally — institutional-grade thinking without the cost or permanence of a full-time hire.

  • Architecture, Not Advice:

  • Every engagement produces a commercial blueprint you can execute immediately — not a report, not a presentation.

  • East Africa, Operationally:

  • 17+ years of in-market execution across East African commercial environments — not frameworks retrofitted from elsewhere.

    ● Commercial Strategy & Planning

    ● Brand Strategy Development

    ● Marketing & Digital Strategy

    ● Mastering Marketing Metrics

    ● Sustainability Marketing

    ● Innovation in Marketing

    ● Digital Customer Experience

    ● Quality Management Systems & Processes Implementation

Our Services

What do we do?

Strategy Lab

BEFORE YOU BUILD, BEFORE YOU BURN

A 2-day diagnostic that tells you which segments to target, how to position, and what to do first so your next move is the right one.

FORMAT

2-day customized workshop

Market Activation Sprint

STRATEGY THAT MOVES IN-MARKET

5–8 weeks of market entry stage business development leadership that converts your commercial plan into real pipeline.

FORMAT

5–8 week sprint

Growth OS

BUILD THE ENGINE, NOT JUST THE CAMPAIGN

A 5-week engagement that aligns marketing, sales, and product into one integrated revenue engine, with shared metrics and an immediately operational roadmap.

FORMAT

8 week engagement

Fractional CMO

THE CMO SEAT. RIGHT NOW.

Embedded C-suite commercial leadership — aligning your growth functions around a unified strategy without the cost or permanence of a full-time hire.

FORMAT

3–5 month engagement

Work

What do people say about us?

"We were trying to move into a new market but our plan was too broad. Subena helped us stop guessing and get precise about where to focus."

CEO, Fintech Company

"For once our young leadership team aligned on who was doing what and in what order. We stopped debating direction and moved."

Director, VC Firm

"We were losing time because marketing and product weren't working from the same plan. Once that was fixed, things moved faster."

Founder, SaaS

"We realised our growth was entirely dependent on who we knew, not what we said. That's not a business but just a network. Subena helped us fix that."

Founder, Insurtech

Get in Touch!

Growth That Outlives Campaigns

C-level expertise to help you make smarter decisions around your revenue streams.

We build growth frameworks that catalyze your commercial traction by connecting every part of your customer's journey.

Email us 'Discovery Call' to start exploring fit: subena@subenagrowth.com

Contact Us!