Entrepreneur · Investor · Berlin

I scale businesses.
Yours could be next.

You're the expert at what you do — but scaling, building structures and growing beyond your own capacity aren't your thing. That's mine. As an operational advisor or as an investor with my own capital. No coaching, no PowerPoint.

Book a conversation →
Steffen Siesing

Sound familiar?

The most common bottlenecks I solve with my clients and portfolio companies.

Growth stalls despite a great product

You're excellent at what you do, but new clients only come through referrals. Sales, marketing and recruiting aren't running systematically.

Processes slow you down instead of speeding you up

Manual workflows, too many tools, no clear responsibilities. You're working in the business, not on it.

Team grows, structure doesn't

From 5 to 15 employees — and suddenly nothing works like it used to. Delegation fails, quality fluctuates.

You need a partner, not an advisor

You want someone who doesn't just talk but takes responsibility — with their own money, own experience, own network.

Collaboration

Two paths, one goal

Whether as advisor or investor — I always work operationally. The difference is in the commitment.

Consulting

Project-based scaling

I come into your business, identify the bottlenecks and fix them. Sales, processes, digitization. Clear scope, clear timeline, measurable results.

No retainer, no slide decks. I work operationally with your team — until the structures are in place.

Fixed price or day rate 3–12 months All industries
Equity

Invest operationally

If I believe in your business model, I invest — with my own capital, operational experience and my network. No fund, no board, no approval process.

Days between first conversation and handshake, not quarters. I decide alone.

Own capital Equity partnership From €50k annual revenue
Services

What I actually do

Five disciplines I master operationally — not theoretically, but from my own entrepreneurial experience.

01

Scale businesses

From solo operation to scalable organization. Most recently: 0 to 30 employees in five years, strong growth every year — fully remote, fully digital.

Org design Remote structures Leadership development
02

Marketing, Sales & Recruiting

Make client acquisition predictable, structure sales processes, win talent. I've scaled companies where sales was pure chance — with clear processes, CRM systems and measurable KPIs.

Lead generation Sales processes Recruiting strategy CRM systems
03

Digitize processes

Eliminate manual workflows, introduce automation, deploy AI tools practically. In my own tax advisory: 30 employees, zero paper, zero unscheduled client calls.

Automation AI in practice Tool selection & rollout
04

Relocation & Internationalization

Moving to Germany or leaving Germany? I guide the entire process — legal structure, tax optimization, substance requirements, bank access. Hands-on, not PowerPoint.

Inbound & Outbound Tax Structure Substance Setup Regulatory & Banking
05

Due Diligence & Acquisitions

I don't just check balance sheets — I check on-site. Employees, processes, clients, the human factor. From my own experience with international transactions.

Operational due diligence Post-merger integration International
Track Record

Numbers that speak for themselves

0 → 30
Employees scaled
€5M
Annual revenue built
100%
remote & digital
15+
Years as entrepreneur
About me

Steffen Siesing

Steffen Siesing

I've built businesses myself: Scaled a tax firm from zero to ten employees, led international technology ventures with partners across three continents, and grew a tax advisory to 30 employees and €5M revenue in five years — 100% remote, fully digitized.

That experience flows into every engagement and every investment. I know what it feels like when growth outpaces structure. And I know how to fix it.

Whether as a project-based advisor or as an investor with my own capital — I always work operationally. No slides, no frameworks. Results.

Timeline

2008 – 2013
Operationally scaled a tax firm (0 → 10 employees)
2011 – 2019
International technology ventures — 30 employees, partners across 3 continents
2020 – heute
Management consulting for SMEs
2021 – heute
Co-founded tax advisory: 0 → 30 employees, €5M in 5 years
Is it a fit?

Honest expectations

Not every collaboration makes sense. Here's what I'm looking for.

It's a fit if you…

  • Master your craft — and you're hungry
  • Already generating €50k+ revenue — but know: there's significantly more
  • Want a partner, not an advisor
  • Get your hands dirty, not just delegate
  • Have a clear vision — including for new ventures
  • Industry doesn't matter: SaaS, services, trade, skilled trades

Not a fit if you…

  • Want "something with self-employment"
  • Just need money without a plan
  • Rather talk than do
  • Don't have a business model with a path to €1M+
  • Looking for a consultant, not a partner with skin in the game
  • Think money alone solves your problem
Network

People who deliver

Own capital

No fund, no board, no approval process. I decide alone. Days between first conversation and handshake.

Done it myself

Built companies from zero, not watched from above. Introduced processes where there was chaos. Created structures that run without me.

Network included

Tax advisors, lawyers, developers, bankers — across Europe, built over 15 years. People who deliver, not talk. When you work with me, you get access to this network.

Got something
worth investing in?

No pitch deck needed. Tell me in 5 sentences what you do, where you stand, and where you're headed. If it fits, we talk.

Berlin · Remote · Project-based or equity