Perry's Résumé - Embedded Firmware and Controls

Designing the boundary between field equipment and the systems that use its data, for electrical automation work.

• Built a secure DNP3 data diode that supplies real-time field data to IT systems while leaving OT field equipment unreachable from the IT side, at a fraction of the cost of commercial diode products, without relaxing the unidirectional guarantee.
• Stood up dev, staging, and production deployment for Ignition SCADA, including automated regression testing of Ignition Python scripting, so script changes are validated before they reach production.
• Working with the teams delivering electrical automation on large projects, on the OT side of that boundary.

Integration, telemetry, and field systems for energy and industrial clients. Remote systems that run unattended for years.

• Created cpppo, a Python EtherNet/IP and CIP library used as the integration layer between analytics and PLCs on the plant floor.
• Built datasim, a large-scale PLC simulation environment (dozens to hundreds of concurrent simulated PLCs) used to measure a SCADA vendor's polling behaviour against degraded WAN and satellite routes before cutover.
• Delivered ruggedized satellite-connected monitoring, communications, and video systems across Alberta oilfields, field-serviceable and diagnosable from hundreds of kilometres away.
• Guide client development teams through cryptographic, distributed-systems, and industrial integration architecture.

Replaced expensive proprietary radio telemetry with commodity computers and SDR, including integration with flight-approved hardware, power, and communications.

• Built an end-to-end real-time receiver decoding many concurrent channels from a 25 Msps I/Q stream on commodity x86 and ARMv8, sustained, with no dropped samples.
• Designed the polyphase filterbank and window/DFT chain, with hot paths hand-optimized in AVX and NEON.
• Reached agreement on readings across lossy RF channels without a central coordinator.
• Built a recorded-signal regression harness so algorithm changes were measured against captured field data.

Architected and tested prototypes of HoloFuel's partition-tolerant transaction engine in Rust, on Holochain's agent-centric framework.

• Designed the system so each agent holds its own signed state, and settlement continues through network partitions instead of waiting on global consensus.
• Validated simultaneous atomic transactions under simulated network partitions.

Custom RTUs and communications for hydrocarbon pipeline control. The protocol is still in operation.

• Developed solid-state RTU firmware for continuous 24/7 control in remote locations. Sustained fewer than 1 defect per 10,000 lines of code, measured in the field, not the lab.
• Deployed hundreds of ruggedized units across critical infrastructure sites.
• Architected LiveWIRE, a cryptographically secure, Reed-Solomon encoded, multi-route protocol for real-time SCADA telemetry over marginal and intermittent links, including across untrusted network segments.

• Re-engineered the core alarm engine of the RTAP SCADA platform around DFA state machines, so end users could configure geographically distributed, safety-critical workflows.
• Still deployed in pipeline SCADA systems continent-wide, 30+ years on.