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Valar Atomics · 5 hours ago

Infrastructure & SCADA Engineer

Hawthorne, CA

Full-time

Onsite

Mid Level

Valar Atomics is focused on enhancing safety-critical operations through technology and security. The Infrastructure & SCADA Engineer will be responsible for operating and hardening the OT infrastructure, specifically the SCADA network and FactoryTalk ecosystem, ensuring stability and implementation of critical systems.

EnergyNuclearOil and GasPower Grid

No H1B

U.S. Citizen Only

Responsibilities

Operate and stabilize FactoryTalk infrastructure (FactoryTalk Linx / View / Historian / related services) and the networks it depends on

Implement and test redundancy/failover in critical environments (OT networks, core services, remote access, and monitoring)

Operate segmented OT networks: Arista/Cisco switching, VLANs, QoS/traffic shaping, and packet-level troubleshooting when things break

Deploy and manage firewalls (Palo Alto & pfSense): segmentation, rule changes, VPNs (SSL/IPsec/WireGuard), and logging/change control

Implement 802.1x and identity-driven network access where appropriate without breaking operations

Operate Windows domain services supporting OT (Domain Controllers, AD, GPO) including hardening and recovery planning

Build/operate PKI and certificate workflows (offline/dedicated CA with OpenSSL + Windows CA), including SSL cert issuance, renewal, and troubleshooting TLS end-to-end

Implement and maintain smart card authentication in Windows AD environments (enrollment, mapping, auth troubleshooting)

Support OT visibility tooling (Claroty) and keep it operational and useful to I&C/Security

Operate supporting infra (Proxmox; Azure VMs/vNets where needed)

Support operator infrastructure as needed: Adder Infinity KVM, VoIP networks, and WiFi systems (Ruckus)

Maintain accurate documentation and operational runbooks: network diagrams, operational procedures, and device/service add/remove processes

Work with I&C / Engineering to resolve issues introduced by hardening/security controls, and coordinate with the Data & Storage Engineer for centralized logging

Qualification

FactoryTalk infrastructureOT/SCADA environmentsNetworking fundamentalsEnterprise firewallsWindows AD/DCPKI/certificate lifecycleSmart card authenticationDocumentation skillsClaroty experienceProxmox experienceScripting for automationRockwell PLC familiarity