Houston · Dallas–Fort Worth
CircuitSky

Sheet 01 — IT + OT, one crew

The team that speaks both PLC and firewall.

Most integrators stop at the control panel, and most IT firms won't touch a plant floor. CircuitSky works across both: the controls, the network, the servers, and the data.

Based in Houston and Dallas–Fort Worth, Texas.

PLANT_NETWORK.DWG — LIVE
A plant network, from the plant floor to the server roomA PLC, HMI, and drives connect through a switch to a firewall at the security boundary, which connects to servers, a historian, and backups. A highlighted signal path runs from the PLC to the historian.PLANT FLOORSECURITY BOUNDARYSERVER ROOMPLCHMIDrives & I/OSwitchFirewallServersHistorianBackups
Every block and every line in this drawing is work we do.Tap a block or a zone to see which part of the job it is.

Bilingual, literally

Same job, two languages.

PLC · LadderRung 0001
   Start_PB     Stop_PB            Motor_Run
──┤ ├──────────┤/├──────────────────( )──
   XIC          XIO                OTE
Firewall · RulesetZone plant→DMZ
permit tcp 10.20.0.0/24 → 10.50.1.12 eq 4840
deny   ip  any          → any        log
# OPC UA to historian. Everything else stays out.

Sheet 02 — The legend

What we work on

Four areas, each a part of the drawing above.

01 / Plant floor

Controls & Automation

Programming, migration, and commissioning for the systems that run the process.

  • PLC programming
  • Moving PLC-5, SLC 500, Siemens 505, and older GE systems to current platforms, with AI-assisted code conversion that our team reviews line by line
  • HMI and SCADA screens
  • Commissioning and troubleshooting
02 / Security boundary

OT Networks & Security

Networks that keep the plant running and keep outsiders out.

  • Industrial networks: switches, routers, and firewalls
  • Segmentation between plant, business, and outside networks
  • Security assessments and fixes aligned with ISA/IEC 62443
  • Secure remote access for vendors and staff
03 / Server room

Infrastructure & Recovery

The servers behind your controls, and a way back when they fail.

  • Servers and virtualization: VMware, Proxmox, and Hyper-V
  • Active Directory
  • Backups of controllers, HMIs, and servers, with restores we actually test
04 / Signal path

Industrial Data & AI

Getting data out of the plant safely, and making it useful.

  • Historians and data collection over OPC UA, MQTT, and SQL
  • Downtime, OEE, and scrap data turned into fixes, not just dashboards
  • AI that reads your plant and never drives it

Sheet 03 — Entry points

How to start

Most teams start here

Specialist support

Need another pair of hands on a job? A CircuitSky specialist joins your team under your direction, by the hour or the day. Much of the work can be done remotely.

Assessments

A fixed-scope, fixed-price look at your controls, network, and backups, ending with a plan you can act on.

Projects

From design through commissioning, handed over documented.

Monthly support

Verified backups, patch and firmware tracking, and remote help, reviewed with you every quarter.

Sheet 04 — Handover

No black boxes.

Plants are full of systems nobody can explain anymore. Every CircuitSky job ends with a turnover package you keep:

TURNOVER_PACKAGE0 / 5 packed

Sheet 05 — Work order

Tell us about the job.

Send a few lines about the site, the systems involved, and what needs doing.

Our founders come from power generation, oil and gas, manufacturing, and construction.

Systems involved
Email info@circuitsky.net

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