OT (Operational Technology) Security Architect

Role

OT Security Architect

Location

Newark, Delaware

We are looking for an OT Security Architect to join our team in one of today's most exciting technologies. This role will report to Chief Security Officer based in Newark, Delaware. This is a fully on-site, 5 days in office role.

Role and Responsibilities

• Deploy, configure, and tune OT security platforms across manufacturing sites endpoint protection, inline IPS, asset discovery, secure remote access, media scanning kiosks, and PLC backup including rulesets, allowlists, exclusions, and detection tuning on production assets.

Own operational health of deployed tooling

agent coverage, sensor health, license utilization, upgrades, and version currency.

Design and implement IT/OT convergence controls

OT DMZ at Level 3.5, brokered access, data flows, identity and directory integration, patching paths, and monitoring feeds.

• Implement defense-in-depth segmentation aligned to the Purdue model and ISA/IEC 62443 zone-and-conduit design, VLANs and rulesets, micro segmentation, and virtual patching for legacy assets partnering with Network Engineering on switching, routing, firewalls, wireless, IIoT, edge, and WAN.
• Run OT asset discovery and integrate telemetry into enterprise SIEM, EDR/XDR, NDR, and vulnerability management; maintain inventory and drive end-of-life OS remediation.
• Implement and test PLC/HMI backup, versioning, and golden-image recovery; support OT incident response and recovery, and lead POCs and production rollouts for new OT security technologies.

Skills and Experience

• Bachelor's degree in Cybersecurity, Computer Science, Electrical Engineering, Industrial Engineering, Computer Engineering, or a related technical discipline, or equivalent hands-on experience.
• 8+ years of cyber security, network, or infrastructure engineering experience, including 4+ years hands-on OT/ICS cyber security in production industrial or manufacturing environments.
• Demonstrated hands-on deployment and operation of OT security tooling at multiple sites.
• Strategy-only, advisory-only, or assessment-only backgrounds will not be considered.

Preferred Qualifications and Technologies

Secure Remote Access

brokered vendor and engineer access to Levels 0–3, session recording, MFA, jump hosts, browser isolation

Malware Scanning Kiosks

USB and vendor media inspection at plant entry points, scan engines, sanitization, and media workflows

OT Endpoint Security

OT-native anti-malware and application allows listing on HMIs, engineering workstations, and legacy or unsupported OS

OT Backup

PLC/HMI and production equipment configuration backup, version control, and tested golden image restore on production assets

Network Segmentation

OT DMZ at Level 3.5, zone-and-conduit design, VLAN-to-firewall migration, micro segmentation, inline IPS and virtual patching

OT Vulnerability Management

passive and active OT asset discovery, risk-based prioritization, compensating controls for non-patchable assets

Purdue Model

applied Levels 0–5 data-flow design and enforcement of trust boundaries across live plants

• TXOne, Claroty, Nozomi Networks, Dragos, Armis, KASM, Dispel, Salvador Technologies, OPSWAT, Octoplant, Cisco Cyber Vision / Client / Catalyst IE, or equivalent OT security platforms.

Enterprise security integration

SIEM, SOAR, XDR/EDR, NDR, PAM, and vulnerability management platforms.

• Windows and Linux server administration, Active Directory, virtualization, storage, backup, and hybrid cloud connectivity.
• Layer 2/3 switching and routing, VLANs, wireless, firewall rule design, NAT, VPN, and WAN connectivity.
• Scripting and automation (PowerShell, Python) for deployment, configuration management, and reporting at scale.
• PLC platforms (Siemens, Rockwell, Schneider, Client, ABB), SCADA, and HMI systems.

Industrial protocols

Modbus, DNP3, Profinet, OPC/OPC-UA, EtherNet/IP,BACnet.

Applied ISA/IEC 62443 and NIST SP 800-82

implementing controls, audit support, risk assessment, threat intelligence, and vulnerability management.

• Multi-site, multi-country manufacturing support experience; MES, historian, LIMS, and quality systems exposure.
• ERC CIP audit or utility customer cyber security requirement support.

Certifications

GICSP, GRID, GCIP, GPPA, ISA/IEC 62443 Fundamentals or Specialist, CISSP, CCNP or equivalent.

• Ability to work safely on production floors, onsite in Delaware, with travel up to 25% and off-hours work during maintenance windows.