NDAs for engineering projects: what to include before sharing files
An NDA for engineering work should define what is confidential (drawings, models, specifications, prices, customer names), limit use to the specific project, restrict sharing with third parties, set how long confidentiality lasts, require return or deletion of files at the end and state that the client owns the designs and deliverables. It is signed before any file changes hands.
Guilherme Rodrigues ItinoseUpdated 2 min read
Key takeaways
- Sign before sending any file, not after the first meeting.
- Define confidential information broadly but clearly.
- Limit use to the project and named people.
- State ownership of deliverables in the service contract.
- Require deletion or return of files when the project ends.
Sending a drawing by email takes seconds; getting it back is impossible. That is why the NDA comes first.
Clauses to include
| Clause | What it covers |
|---|---|
| Definition | Drawings, models, specs, prices, processes, customer names |
| Permitted use | Only for the stated project |
| People | Only employees and subcontractors who need it, bound by the same terms |
| Duration | How long confidentiality lasts after the project |
| Return or deletion | Files destroyed or returned at the end, with confirmation |
| Ownership | Client owns its information and the deliverables it pays for |
| Remedies | What happens in case of breach, governing law |
Practical habits that matter as much
- Share the minimum needed for each task.
- Use controlled links with access logs instead of attachments.
- Do not allow portfolio use of client work without written consent.
This article is general information, not legal advice. At Downway we sign NDAs before receiving files and never show client work without written authorization. See engineering support.
When to outsource this
- You are about to share drawings with a new supplier or designer
- Customers require you to protect their files
When not to
- You are sharing only public catalog information
FAQ
Is an NDA enough to protect my design?
It is one layer. Combine it with sharing only what is needed, ownership clauses in the service contract and suppliers you trust.
Mutual or one-way NDA?
One-way when only you share information; mutual when both sides do, for example in co-development.
How long should confidentiality last?
Commonly several years after the project, or indefinitely for trade secrets. Ask a lawyer for your case.
Should I have a lawyer review it?
Yes, especially for valuable designs and international suppliers. This article is not legal advice.
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