Senior Information Security Engineer Jobs in Appleton, WI

IIoTSecurity Architecture and Standards

• Security Architecture: Define and own the security architecture for connectedIIoTproducts, including device identity frameworks (PKI/certificate management), secure boot chains, cryptographic key management, and hardware root of trust.
• Industrial Standards Leadership:Establishand enforce security design requirements based on applicable standards and frameworks (e.g., IEC 62443, UL 2900, NERC CIP, NIST SP 800-82, NIST CSF) across product lines.
• OT/IT Convergence: Design security boundaries and communication controls for environments where operational technology (OT) interfaces with enterprise IT systems, ensuring defense-in-depth across both layers.
• Protocol and Interface Security: Evaluate andprovidesecurity guidance on industrial communication protocols used in energy and grid applications (e.g., IEC 61850, DNP3, Modbus, CAN bus, GOOSE/Sampled Values).

Threat Modeling and Risk Management

• Lead Threat Modeling: Conduct and lead structured threat modeling exercises (e.g., STRIDE, PASTA) for newIIoTproduct initiatives and significant feature changes, translating identified risks into actionable design controls.
• Risk Prioritization: Assess and prioritize security risks across fielded and in-development device portfolios based on exploitability, potential impact to grid operations or physical safety, and business criticality.
• Vulnerability Coordination: Serve as the technical lead for coordinating responses to security vulnerabilitiesidentifiedin fieldedIIoTproducts, including working with Product, Engineering, and customers on disclosure and remediation timelines.
• Supply Chain Security: Evaluate hardwarecomponentand third-party software supply chain risks, providing security requirements for procurement and vendor selection of embedded components.

Governance, Consultation, and Leadership

• Security SME: Act as the primary subject matter expert forIIoTand OT product security, providing high-context technical consultation to product architects, engineering leads, and executive leadership.
• Security Standards Ownership: Own the product security standards, policies, and design review processes applicable toIIoTdevices, ensuring teams have clear, actionable requirements before development begins.
• Cross-Functional Collaboration: Partner with Hardware, Firmware, Systems Engineering, and Product Management teams to embed security requirements early in the product development process without creating unnecessary friction.
• Incident Leadership: Serve as the senior technical contributor during high-severity security incidents involving fieldedIIoTproducts, leading root cause analysis and driving architectural improvements to prevent recurrence.
• Public Disclosure and Advisory: Coordinate with Threat Intelligence and engineering teams to documentidentifiedvulnerabilities andassistin drafting CVEs and public security advisories following successful remediation.

TechnicalComponents

• IIoTand Embedded Security:Demonstratedexpertisein securing embedded andIIoTdevices, including secure boot, hardware security modules (HSMs), trusted execution environments (TEEs), and firmware security architecture.
• Industrial Protocols: Working knowledge of industrial communication protocols common in energy and grid applications (IEC 61850, DNP3, Modbus, CAN bus) and their associated security considerations.
• OT/ICS Security: Strong understanding of OT and ICS security principles, network segmentation strategies (e.g., Purdue Model, IEC 62443zonesand conduits), and the unique threat landscape of connected energy infrastructure.
• PKI and Cryptography: Solid understanding of public key infrastructure, certificate lifecycle management for device identity, and applied cryptography as it relates to constrained embedded environments.
• Security Standards: Deep familiarity with IEC 62443, UL 2900, NERC CIP, and NIST SP 800-82; ability to translate standards requirements into concrete, enforceable product security controls.
• Threat Modeling: Proven experience leading structured threat modeling sessions for hardware/firmware products in OT or energy environments.
• Performs other related duties as required and assigned.

The job description and responsibilities described are intended to provide guidelines for job expectations and the employee's ability to perform the position described. It is not intended to be construed as an exhaustive list of all functions, responsibilities, skills, and abilities. Additional functions and requirements may be assigned by supervisors as deemed appropriate.