Hello

Marius StemmerMS

I'm Marius

Finance & operations, modelled and shipped.

I turn ambiguous business problems into clear financial models, then into the dashboards, tools and automations that run them. Most finance people stop at the spreadsheet. I ship the software too.

€5.5M
Series A modelled
3yrs
Accenture PMO
4+
Live tools shipped
What I do

My work skill

001

Financial modelling & planning

Driver-based models, budgets, forecasts and scenario analysis, P&L through to cash and runway.

002

Fundraising & investor materials

Series A model, cap table, data room, deck and board reporting. The pack investors actually read.

003

KPIs & BI dashboards

Performance tracking that turns messy data into decisions. Power BI plus custom live dashboards.

004

Ops & process automation

Design the process, then automate it. Scalable systems and workflows a growing team can run.

005

BD & commercial

Partnerships, outreach pipelines and commercial strategy, wired into the same systems as the numbers.

006

Full-stack internal tools

When off-the-shelf will not do, I build it: Next.js, Supabase, Python. Shipped to production.

About

I model the business and build what runs it

I am a finance and operations person who also ships software. Twelve years across strategy, controlling and project delivery at Accenture and a Series A biotech, plus a habit of building the tools rather than waiting for them.

That range is the point: I can own a problem from the board-ready model all the way to the production deploy, instead of handing it off halfway.

See my work
Abstract systems illustration
A financial model you can play with
drag a driver · everything recomputes live
Revenue 2032
€118.6M
EBITDA 2032
€89.7M
Break-even
2029
Product Platform €M · 2026–2032
Built for a real Series A (Senara GmbH), shown here on invented figures, not real company data.
Selected work

My latest work

Built for Senara GmbH, a German Series A biotech. The live demos are a showcase on invented data under a stand-in name, so no real company figures are shown. The systems and methods are real.

Background

Experience

Finance & Business Operations2026
Senara GmbH · Series A biotech · freelance
  • Financial model, forecast and scenario planning.
  • Investor reporting and a full Series A data room.
  • KPI dashboards and market-intelligence tooling.
PMO & Controlling Lead2025—now
Accenture · Innsbruck & Vienna · part-time
  • Account PMO for a public-sector client.
  • Budgeting, controlling and portfolio reporting.
  • Power BI and automation for decision support.
Data & IT Project Manager2023—25
Accenture · Innsbruck
  • Regulatory reporting, Finance & Risk, bank clients (ECB & OeNB stakeholders).
  • Reporting workflows in Power BI, Jira and Excel.
Freelance · Strategy & PM2021—23
Independent · Innsbruck
  • Digital strategy and IT project delivery for NGOs and startups.

Education

BSc International Relations2018—21
Leiden University · Campus The Hague
Minor, Entrepreneurship & Development2020
TU Delft
Abitur2016
Kolleg St. Blasien

Toolkit

  • Finance: modelling, budgeting, controlling, PMI CAPM
  • Data & BI: Power BI, Excel, SPSS
  • Ops: Jira, Confluence, Notion, HubSpot, Airtable
  • Build: Next.js, Supabase, Python
  • Languages: German, English, Dutch
Work with me

Let's talk about your numbers

Whether you are hiring or need a specific thing built, the strength is the same: finance and operations, plus the ability to ship the systems behind them.

Full-time
Finance · Strategy · Ops

Finance & growth, strategy or founder-associate roles at ambitious startups, ideally where building systems is part of the job.

Freelance
Fixed-scope mandates

A financial model, an investor or board reporting pack, a KPI cockpit, or a bespoke internal tool.

Email marius.stemmer@proton.me LinkedIn /in/marius-stemmer Innsbruck, Austria