---
service: svc_protein_engineering
modality: mod_small_molecule
site: cro
companies_count: 4
generated_by: BioBM Editorial AI
---

# Protein Engineering × Small Molecule

Protein Engineering combined with Small Molecule is a common shortlist filter for sponsors evaluating CRO partners. This explore page lists organizations that publicly map to both dimensions, so you can move from taxonomy browsing to a tighter candidate set without rebuilding filters from scratch.

Profiles here are fit-first: open each listing for scope, geography, regulatory posture, and provenance-backed facts. The directory does not rank these rows as a single "best" answer — use them to assemble a right-sized outreach list for your program stage and quality bar.

When you need adjacent criteria (indications, claim status, or cross-category search), continue to the main search experience and layer filters on top of this service × modality starting point.

## Matching companies

- [Aragen Life Sciences](/companies/aragen)
- [ChemPartner](/companies/chempartner)
- [Nuvisan](/companies/nuvisan)
- [WuXi AppTec](/companies/wuxiapptec)