Hello! I'm Marius Stemmer, Finance & Operations

An operator with a builder's mind.

I model the business and build the systems that run it. Financial planning, fundraising and investor materials, then the dashboards, tools and automations behind them.

€5.5M
Series A modelled
3yrs
Accenture PMO
4+
Live tools shipped
Marius Stemmer Operator
Financial modellingFundraisingInvestor reportingKPI dashboardsProcess automationFull-stack tools Financial modellingFundraisingInvestor reportingKPI dashboardsProcess automationFull-stack tools
What I do

Six things I
get hired for.

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.

003

KPIs & BI dashboards

Power BI plus custom live dashboards where a spreadsheet is not enough.

004

Ops & process automation

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

005

BD & commercial

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

006

Full-stack internal tools

Next.js, Supabase, Python. Investor portals, CRMs, monitoring tools, shipped to production.

Selected work

My latest work.

Built for Senara GmbH, a German Series A biotech. The card previews are clean mockups; the live demos run on invented data under a stand-in name, so no real company figures are shown.

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.
Data & IT Project Manager2023—25
Accenture · Innsbruck
  • Regulatory reporting, Finance & Risk, bank clients (ECB & OeNB stakeholders).
  • Reporting workflows in Power BI, Jira and Excel.

Education

BSc International Relations2018—21
Leiden University · Campus The Hague
Minor, Entrepreneurship & Dev.2020
TU Delft
Abitur2016
Kolleg St. Blasien

Toolkit

Financial modellingPower BIExcelSPSSJiraNotionHubSpotAirtableNext.jsSupabasePythonPMI CAPM

German · English · Dutch · Innsbruck, Austria

Work with me

Let's build the system behind it.

Whether you are hiring or need a specific thing built, the strength is the same: finance and operations, plus the ability to ship the software behind them. Open to full-time roles and select freelance mandates.