The SCADA Integrator Due-Diligence Checklist

A SCADA project sits at the center of your operation. It is how your people see the plant, how alarms reach the right person, and increasingly how data flows to your MES and analytics. A weak integrator does not just deliver a clunky interface — they leave you with an unmaintainable tag database, a security hole, and no documentation to hand the next engineer. Choosing well is worth real diligence. This checklist is what to verify before you sign, whether the integrator is down the road or across a border.

1. Platform depth on your specific stack

SCADA is not one thing. Ignition, Wonderware / AVEVA, FactoryTalk View, WinCC, and Zenon are different worlds. Ask which platform the integrator has actually shipped production systems on — not trained on, shipped. Then go deeper:

• How do they structure tags and templates? (A good answer involves reusable UDTs / templates, not thousands of hand-built tags.)
• How do they handle historian configuration and data retention?
• Have they done redundancy and failover on your platform, if you need it?

Vague, brand-name answers are a red flag. Specific answers about architecture are a green flag.

2. Architecture and scalability

A SCADA system that works for 500 tags can collapse at 50,000 if it was built naively. Ask the integrator to describe the architecture they propose: client/server topology, how many clients, thin-client versus thick, edge versus central historian, and how the design accommodates growth. If they cannot sketch this on a whiteboard (or a shared doc) in fifteen minutes, they have not thought about your scale.

3. Cybersecurity posture

This is the section most often skipped and most often regretted. A SCADA integrator in 2026 must treat security as a first-class deliverable, not an afterthought. Verify:

• Network segmentation between the control network and IT / the internet.
• No default passwords, and a real user-role model with least privilege.
• Secure remote access (VPN or a managed gateway), never an open port.
• A patching and backup story for the SCADA servers.

If the integrator's plan is to put an HMI on the office network with a default login "so you can check it from home," walk away.

4. Documentation and handover

The difference between a maintainable system and a hostage situation is documentation. Require, in writing, that the deliverable includes: an as-built architecture diagram, a tag/naming-convention document, an alarm rationalization list, and a backup/restore procedure. Ask to see a sample documentation package from a past project. An integrator who documents well is telling you they expect you to be able to maintain the system without them — which is exactly the integrator you want.

5. References and verified skill

Ask for two or three references on the same platform and industry, and actually call them. Ask the references one blunt question: "Would you hire them again, and what went wrong?" Every project has something that went wrong; an honest reference will tell you, and the answer reveals how the integrator handles problems.

When you hire across borders, references are harder to check and résumés are easier to inflate — which is exactly why a verification layer matters. On Talengineer, engineers pass a practical AI screener and can earn platform certification, so a certified profile has demonstrated skill under test conditions before you ever call a reference. It does not replace reference checks, but it raises the floor and filters out the profiles that only look good on paper.

6. Commercial structure and payment protection

How the deal is structured tells you how the project will go. Favor:

• Milestone-based payment tied to acceptance tests, not a single lump sum on "completion."
• A defined change-order process so scope creep does not become an argument later.
• Escrow for cross-border work, so funds are held and released against accepted deliverables rather than wired on trust.

Milestone escrow on Talengineer provides exactly this, with a 15% platform fee (5% for founding customers) covering payment handling and a defined dispute-resolution process. It protects you if delivery slips and protects the integrator if payment does.

7. The one-line stress test

If you only have time for one question, ask this: "Walk me through what you would hand the next engineer if you got hit by a bus mid-project." A strong integrator answers immediately — documented tags, version-controlled projects, an as-built, a backup. A weak one goes quiet, because the honest answer is "a mess only I understand." That single question separates professionals from cowboys faster than any résumé.

Using the checklist

Run every candidate through all seven items and score them. You are not looking for a perfect score — you are looking for specific, confident answers and honest acknowledgment of trade-offs. The integrator who says "here is how I would architect it, here is the security model, here is the documentation you will get, and here is a reference who will tell you what went wrong" is worth more than a lower bid with vague reassurances.

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