john-herold is a Decatur-based controls and field service engineering firm specializing in industrial automation and mission-critical data center construction.

Services & Capabilities

As detailed in page-3192157, the firm delivers four primary services:

• Controls Engineering: Custom PLC, SCADA, HMI, and DCS logic design.
• Field Service Engineering: Direct site technical support, loop checkouts, and device configuration.
• Commissioning: FAT/SAT planning and Integrated Systems Testing (IST).
• Systems Integration: End-to-end data flow bridging BMS and power monitoring via Modbus, BACnet, Ethernet/IP, and OPC-UA.

Target Markets

• Industrial Automation: Production facilities, manufacturing plants, and process infrastructure.
• Data Centers: New build and expansion projects for colocation and enterprise clients.

Resources

• Herold Controls Digest: A weekly technical newsletter authored by the team (see page-3192155).