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ERock is a leader in Electrical Resiliency-As-A-Service, designing and deploying advanced dual-purpose microgrids that protect companies and critical infrastructure from power outages. The company uses natural gas and renewable natural gas (RNG) to power dependable microgrids with significantly lower to zero carbon emissions compared to traditional diesel generators. ERock's GraniteEcosystem™ software provides 24/7/365 monitoring, optimization, and forecasting.
As an OT Infrastructure Engineer I, you will support and secure operational technology infrastructure across remote and active production facilities. You will be on the front lines deploying, testing, maintaining, and troubleshooting field networks, industrial firewalls, switches, and cellular telemetry devices. You will partner closely with the Microgrid Control Center (MCC), field commissioning teams, and engineering groups to ensure high-availability communications and robust network security boundaries across all field sites.
Key responsibilities include:
- Rack, cable, configure, and commission edge routers, switches, industrial firewalls, and third-party telemetry devices during new site test and turn-up phases
- Implement and maintain Access Control Lists (ACLs), firewall rules, and security zones to protect critical operational assets while isolating OT traffic from enterprise networks
- Deploy and support IPSec Site-to-Site VPN tunnels between industrial field locations, data centers, and cloud platforms; configure cellular gateways and manage SIM card activations with carriers
- Perform hands-on packet-level diagnostic analysis using Wireshark, tcpdump, or CLI packet capture tools to isolate connectivity drops, latency, routing anomalies, and protocol failures
- Work directly with the MCC and commissioning engineers during site cutovers to validate end-to-end telemetry, verify SCADA/OT communications, and confirm network visibility
- Maintain precise IP address allocation tables, port mapping records, standard operating procedures, and site network topology diagrams
The role requires comfort with physical fieldwork, including terminating Ethernet cabling, tracing physical connections, mounting field hardware, and working in industrial or substation/microgrid environments. You will occasionally lift up to 50 lbs and be on your feet for multiple 8+ hour days. A personal vehicle is required.
REQUIREMENTS:
Basic (Required):
- Associate or Bachelor's degree in Network Engineering, Cybersecurity, Computer Information Systems, or equivalent technical certifications/hands-on experience (0–2 years in an IT/OT networking environment)
- Strong working knowledge of IPv4 addressing, subnetting (VLSM/CIDR), DHCP, DNS, NAT/PAT, and OSI/TCP-IP reference models
- Practical understanding of Site-to-Site IPSec VPN configurations and Access Control List (ACL) syntax on routers and firewalls
- Familiarity with packet sniffers (such as Wireshark) to capture, filter, and inspect network traffic during troubleshooting
- Comfort terminating Ethernet cabling, tracing physical connections, mounting field hardware, and working in industrial or substation/microgrid environments
- Ability to communicate technical issues clearly under pressure, follow change control procedures, and collaborate effectively with remote teams
Preferred:
- Active foundational networking or security certifications (e.g., CompTIA Network+, Security+, Cisco CCNA, Fortinet FCIT/FCA, or Palo Alto PCCET)
- Hands-on exposure to industrial protocols or environments (e.g., Modbus, DNP3, OPC-UA, SCADA systems)
- Experience working with cellular modems (Cradlepoint, Sierra Wireless, Digi) and APN/SIM provisioning
