---
title: "Dr Tanja Kirsten Siems — Ownership Dossier"
canonical: https://whiteintel.dev/entity/31eb12ea-d30a-5df9-9f3d-645fb1a2b802
json: https://whiteintel.dev/api/public/dossier/31eb12ea-d30a-5df9-9f3d-645fb1a2b802
identifier: oo-person:GB-COH-PER-04744104-gAKhA4QQ6H4_H8epplKidRkphkQ
jurisdiction: DE
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Dr Tanja Kirsten Siems

**Type:** Person  
**Jurisdiction:** DE  
**Identifier:** `oo-person:GB-COH-PER-04744104-gAKhA4QQ6H4_H8epplKidRkphkQ`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/31eb12ea-d30a-5df9-9f3d-645fb1a2b802  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/31eb12ea-d30a-5df9-9f3d-645fb1a2b802  

## Ownership & control

### Holdings / subsidiaries

- **T2 SPATIALWORK LIMITED** (beneficial owner) — 50% — https://whiteintel.dev/entity/8b7fa187-7d4b-508a-bf70-98e8375fb519

## Provenance

- OpenOwnership — https://www.openownership.org

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Dr Tanja Kirsten Siems**. Human view: https://whiteintel.dev/entity/31eb12ea-d30a-5df9-9f3d-645fb1a2b802 · Structured JSON: https://whiteintel.dev/api/public/dossier/31eb12ea-d30a-5df9-9f3d-645fb1a2b802._

_Risk levels are heuristic investigative leads, not legal determinations of beneficial ownership. Every claim carries a source; an absent edge means "not yet observed in current sources", not "does not exist"._