Growth Marketing - without the guesswork.

Think of it as four gears, depending on what you actually need:

Fractional is ongoing, part-time strategic leadership. Ideal if you need a senior marketing brain setting direction, managing a team, and owning outcomes, but can't justify (or don't need) a full-time CMO or Head of Growth yet.

Interim is full-time or near full-time, for a defined period. Ideal during leadership transitions, rapid scaling phases, or when you need someone to take the wheel completely while you find a permanent hire.

Freelance is project or channel-specific execution. I embed into your team to own and deliver specific workstreams: paid acquisition, tracking setup, performance audits, CRO, reporting. Hands-on, focused, and time-bound.

Consultant is advisory and strategic input without day-to-day execution. I review your setup, challenge your thinking, and give you a clear outside perspective on your strategy, team structure, channel mix, or a specific problem you're trying to solve. Ideal if you have execution capacity but want senior expertise on demand, without a retainer.

In practice, engagements often blend these modes. We'll figure out what fits best in an initial conversation.

I strongly prefer long-term, embedded partnerships over quick engagements that end with a strategy deck and a handshake.

I've seen too many consultants run a few workshops or a quick audit, hand over a 40-slide presentation, and disappear. The deck looks great, but nothing gets implemented. Six months later the company is back to square one.

That's not how I work. I stay involved long enough to see things through: diagnosis, strategy, execution, results. Being there when the plan meets reality, when something stops working, and when the wins need to be built on. That's where the real value is. In practice, this means that most of my engagements run from several months to over a year.

That said, if a specific project, audit, or short-term gap is what's actually needed, I'll always be upfront about it. But if you're looking for someone to hand over a strategy and move on, I'm probably not your guy.

Depends on how we work together.

In an interim or fractional capacity, I step in as a senior leader. That means managing and directing your team, setting the strategy, and making sure the right people are doing the right things. Delegation is part of the job, that's what leadership looks like.

For freelance engagements it's a different story. I don't have a permanent team behind me, and unlike with an agency there are no hand-offs. No account managers, no juniors straight out of uni learning on your budget. I own the work myself and bring in the senior expertise of someone who has done this across 50+ clients and over a decade.

That said, I have a trusted network of senior freelancers I've worked with over the years, and I'll bring the right people in when a project calls for it (e.g. for design or development work). Either way, you're never getting handed off to someone without the experience to back it up.

Possibly — but honestly, it matters less than you might think.

In growth and performance marketing, what moves the needle isn't deep industry knowledge — it's knowing which levers to pull to create sustainable, scalable growth: funnel structure, channel mix, actionable data, attribution, creative testing — these transfer across verticals. A well-crafted paid search campaign works whether you're selling software or solar panels.

That said, business model specifics absolutely matter, and those I have. B2C, D2C, e-commerce, B2B, lead gen, mobile apps, subscription models — the mechanics of each are different, and I've worked across all of them.

What's genuinely industry-specific (audience behaviour, terminology, buying triggers) I learn fast. That's a deliberate part of how I start every engagement: getting sharp on your market, your product, your customers, and what makes them convert. In practice, that ramp-up takes days, not months.

So if you're asking whether I've run campaigns for a company exactly like yours — maybe not. But if you're asking whether I can come in and drive results in your market — that I'm confident about.

Rates vary depending on engagement model, scope, and duration.

Fractional / Interim engagements are typically structured as a monthly retainer based on days per week or month — the most common model for ongoing strategic work.

Freelance / Consulting / Project-based work is scoped on a value-based fixed rate or at a day rate, depending on what makes more sense for the work involved.

I don't publish fixed rates because the right structure depends on your situation and is influenced by project duration and level of commitment.

Either way, you're investing in 12+ years of senior-level expertise across paid media, growth strategy, and marketing leadership. The ROI expectation is built in.

The best starting point is a conversation. Reach out at hey@gthln.com.

Both. And the work looks different for each.

With early-stage startups, it's often about building from scratch: the right tracking foundation, finding channels that work, establishing a testing rhythm, and avoiding the expensive mistakes that slow companies down before they've found their footing.

With scale-ups and established companies, it's usually about fixing what's not working, breaking with inefficient patterns & processes, unlocking the next layer of growth, or adding senior leadership capacity during a transition or push.

I also advise NGOs and non-profit / mission-driven organisations at a highly favourable rate. The work is the same: marketing strategy, hands-on paid media, performance marketing. But I apply a reduced pricing model because I think organisations doing good in the world should have access to senior marketing expertise, not just the ones with the biggest budgets.

Honest answer: it depends on what's broken, what's already working, your budget, and how quickly we can move.

My case studies give a concrete sense of what's been possible across D2C e-commerce, B2B lead gen, and mobile user acquisition. The pattern across all of them is the same: diagnose the problem first, build hypotheses, test, and then scale what works.

Early signals usually show within the first 4–8 weeks. Structural gains compound from there.

Before we start, I'll give you an honest read on what's realistic for your specific situation, not a best-case pitch.

AI is woven into most of what I do: creative production, copywriting, campaign automation, audience research, lead enrichment, and reporting agents. The expertise section covers the specifics.

What's worth adding here: I don't use AI as a shortcut to mediocre output. The value is in building workflows that are genuinely faster and more productive, custom-built for your stack. When it's working well, you move faster without sacrificing quality or control.

Both!

Although remote-first by default. Most engagements are fully remote, and it works well. I've collaborated effectively with teams across Europe, the US, and beyond.

That said, I'm available on-site or hybrid when it makes sense: kick-offs, strategy workshops, team sessions, or situations where being in the room accelerates trust or alignment. I'm happy to travel across Europe and internationally for the right engagement.

Geography has never been a dealbreaker either way, but it's worth discussing early if you have a preference.

German — Native
English — Native
Spanish — Full professional proficiency
Portuguese — Advanced proficiency
Italian — Advanced proficiency
French — Intermediate proficiency
SQL — Full professional proficiency
HTML/CSS — Advanced proficiency
Python — Intermediate proficiency

Language has always been part of how I work. I studied Intercultural Management, have lived and worked across Germany, Spain, and the US, and have collaborated with teams across Europe, Latin America, and beyond.

That background shapes how I communicate with clients, partners, and teams. Not just which words I use, but how I read a room. For companies operating across markets, this tends to matter more than people expect.