Programmable Logic Controller

A programmable logic controller (PLC) is an industrial computer which is adapted for the control of manufacturing processes, such as assembly lines or robotic devices. A programmable logic controller expert witness is typically an electrical engineer or mechanical engineer with an advanced degree and extensive experience. Cahn Litigation Services is often called upon to locate expert witnesses that can support programmable logic controller matters to present evidence to support a case on behalf of the plaintiff or defendant.

Often, matters requiring product design expert witness services involve intellectual property, such as a patent infringement case or trade secrets dispute. A programmable logic controller subject matter expert could also be instrumental in a product liability case.

Litigation support by a programmable logic controller expert witness could include analysis, expert report, expert opinion, expert witness testimony, and trial testimony in court. In a high-profile case, or litigation involving a significant financial stake, counsel may request an engineer with prior expert witness experience. Programmable logic controller expert witnesses must have a deep understanding not only of the target technology, but also of the major players in the industry, market growth, market share, market dynamics, and competitive landscape. It is also essential that an expert witness possess the ability to provide expert testimony in such a manner that a jury and judge can understand the factual evidence.

Whether the case involves a distributed control system, microprocessor, industrial controls or industrial automation, Cahn Litigation Services has the experience required to turn an expert witness search around quickly and provide the right balance of expertise and testimony to support each unique project and its nuances.

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Programmable Logic Controller Expert Witness - Sample Bios

Please Note: All Cahn Litigation expert witness searches are customized to attorneys' precise specifications and preferences. Attorneys are encouraged to discuss search parameters with a Cahn search specialist.

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The below expert witness bios represent a small fraction of those Programmable Logic Controller experts known by Cahn Litigation Services. These bios are provided to give attorneys a sense of the Programmable Logic Controller landscape.


Expert Witness #216323

This expert holds a PhD in Robotics and Automation, is a Professional Engineer, and brings to the table many years of experience in automation systems with specific expertise in instrumentation, control, and software related to electro-mechanical systems. This expert has successfully applied these core strengths in numerous industries including: manufacturing; medical and biomedical; nanotechnology and semiconductor. A former Chief Scientist of a robotics research group and technical architect of multi-million dollar projects with Fortune 500 companies and Federal agencies, this expert has written five copyrighted software systems. This expert has worked extensively with:

-  factory automation and factory automation software
-  process control
-  computer controlled machines
-  robotics software and manufacturing software
-  software source code languages for programming machines
-  designing machines and motion control systems
-  programmable logic controllers and their software

This expert has courtroom experience with analyzing software in theft of trade secrets and patent cases. This expert accepts a small number of litigation support engagements to complement regular work as a professional engineer designing automation and machine control systems.


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Expert Witness #254474

This expert is an electrical engineering expert with many years of hands-on experience in industrial controls, automation, machinery, equipment, industrial safety and machine safeguarding. This expert applies expertise to forensic casework involving industrial controls, machine safeguarding, workplace safety, industrial/commercial/residential electric power systems, electrical related fires, electric shocks, and electrocutions. This expert is proficient in the National Electrical Code, National Electrical Safety Code, Electrical Safety in the Workplace, OSHA Standards for General Industry, and OSHA Electrical Safety Standards.

For many years this expert was a controls engineer for a control system integrator, where this expert was involved in control panel design, industrial automation, machine control, electrical design, software programming, installation, electrical contractor supervision, machine safeguarding, commissioning, project management, electrical power distribution and workplace safety. This expert was a corporate engineer performing electrical engineering in 4 different manufacturing facilities, including industrial controls, automation, process control, process engineering, quality control, robotics, industrial safety, machine safeguarding manufacturing supervision, and product development.

This expert is a licensed Professional Engineer in more than 20 states and a member of the National Academy of Forensic Engineers (NAFE), National Society of Professional Engineers (NSPE), American Association of Safety Engineers (ASSE) as well as the Institute of Electrical and Electronics Engineers (IEEE).

This expert provides technical investigations, analysis, reports, and testimony toward the resolution of commercial and personal injury litigation involving design, construction, operation, maintenance and training of electrical systems, equipment and devices.

This expert’s areas of expertise include:

Automation, controls, automated manufacturing, automated assembly lines, conveyors, robotics, material handling, packaging, robotic cells, automated storage and retrieval systems (ASRS), test cells, gantries, cranes, elevators, conveyors, lifts, turn tables, pumps, fans, scales, instrumentation, motion control, process control, boiler control, steam control, speed control, industrial controls, HVAC systems, air conditioners, air handling, boilers, compressed air, exhaust, centrifugal and absorption chillers, heaters, ovens, presses, grinders, cutting, broaching, stamping presses, hydraulics, pneumatics, vision, inspection, weighing, RFID, barcode, RF Radios, recipe/batch management, gas analyzers, motor controls, motion control, electrical control panels, control panel design/build (UL certified), PLC, HMI, MES, SCADA and software development, industrial communications (wired and wireless), information systems, data collection, data reporting, alarming, and industrial safety.

This expert’s expertise also extends to:

Industrial control software, programmable logic controllers (PLC), human machine interface (HMI), graphical user interface (GUI), supervisory control and data acquisition (SCADA). Other software Visual Basic, C++, Microsoft SQL.  PLC Software, Allen Bradley/Rockwell RSLogix/5/500/5000/IPDS, Siemens S5/S7/TIA Portal, Mitsubishi MEDOC/GX Developer/GX Works, Omron, Telemechanique, Modicon,B+R, Opto22, Steeplechase VLC, PC Worx, Wago, Automation Direct, Koyo HMI / GUI / SCADA Software, Rockwell RSView, Rockwell FactoryTalk, Allen Bradley Panelbuilder, Siemens WinCC, Mitsubishi GOT, Mitsubishi GX Worx, Wonderware, Intellution, Iconics, Cimplicity, Proficy iFix, Indusoft, Automation Direct C-more, Industrial Communication Networks, Ethernet, Profibus, Profinet, Ethernet I/P, DeviceNet, ControlNet, Interbus, and ASi-Bus.


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Expert Witness #226812

This expert holds a Ph.D. in Electrical Engineering and has extensive experience developing Application Specific Integrated Circuits (ASIC), semiconductor memories (DRAM and variety of other types), and Programmable Logic (FPGA and PLD) products used in the design of digital computer and telecom systems. This expert has developed Electronic Design Automation (EDA) software products based on behavioral (C, Verilog and VHDL) synthesis and ASIC/FPGA placement-route (physical design). This expert created an engineering design methodology and directed a world-wide operation that released over 3000 gate array (ASIC) designs. This expert was a key contributor in development of various memory (DRAM, SRAM, & serial memory) and logic products. Several patents in semiconductor processing and device structures and ?C to RLT? software compiler technology was issued along with multiple Technical Disclosure Bulletins. This expert?s experience includes various types of re-configurable (Field Programmable Gate Array) logic hardware & software products.

This expert created an Application Specific Integrated Circuit (ASIC) design methodology many years ago that incorporated scan test FlipFlops on IO cells that can be used to test internal operations of ICs. This ASIC design methodology was used to create over 3,000 IC designs, a few of which employed the expensive ?scan-test? capability.

This expert?s numerous expert reports and depositions in IC-related patent litigation cases have resulted in favorable settlements, and this expert has testified in court on IC cases as well. This expert has acquired extensive prior art documents and products over years in the industry. This expert has also provided technical background at the patent office during Re-Examination reviews and at court tutorials.
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Expert Witness #230902

This expert has many years of experience in hardware and software engineering from embedded systems in the telecommunications and robotics fields to very large-scale enterprise systems. This expert has developed embedded systems for media distribution, high speed encryption and robots; enterprise systems; AI technologies; computer language compilers and interpreters; operating systems; network protocols and knowledge discovery tools; and web and non-web Internet based systems. This expert has extensive experience with more than 45 computer languages and relational, object and post-relational database systems. This expert has developed custom loaders for object code and understands the general requirements of a bifurcated OS or API where executable code for certain concerns are stored in separate and interchangeable code and data elements. This expert has also developed table-based solutions for localizing executables.

Selected Professional Experience

Senior Systems Engineer – Lead engineer of a team responsible for porting MS-DOS and Microsoft Windows to Paradyne PCs. Developed drivers and BIOS. Senior engineer on team responsible for porting and customizing the first implementation of Microsoft Xenix, which later became SCO Unix. Consulted to team responsible for localizing Paradyne products for various foreign language markets.

Department manager and lead engineer of Embedded Systems for a Robotics Group. Under this expert’s direction and following this expert’s design, the group developed a custom real-time operating system with extensions for executing a software-based replacement for Programmable Logic Controllers using a custom logic language compiler of this expert’s design, a distributed multi-node inter-process communication subsystem and other OS extensions.

This expert has years of experience providing expert reports, depositions and testimony for patent litigation, forensics and software contract disputes in telecommunications, computer and network technologies, media distribution and media handling devices and cellular devices and networks including both hardware and software.

This expert’s expert analysis and conclusions were instrumental in achieving successful results in several cases, including a petition before the PTAB for re-examination of a patent’s validity, wherein this expert’s expert written and oral opinions led to a reversal of the Board’s previous invalidity decision, resulting in the patent’s validity being sustained, as well as a similar reversal of a prior decision on a second patent the following day, using the same arguments.


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Expert Witness #238561

This expert is a Professional Engineer with Mechanical Engineering, Structural Engineering, and Civil Engineering degrees and certificates. This expert has a good deal of ladder logic experience within the context of Programmable Logic Controllers (PLC) and Computer Numerical Controls (CNC). This expert was engaged in the design, manufacture, installation and startup of robotic pick and place machinery, performing all engineering calculations necessary in the design of these robotic machines and programming the PLCs during the initial installation period. This expert has also dealt with the design and construction of industrial material handling systems, such as conveyors, piping systems, crane, monorails, robotics, PLCs, hydraulics, pneumatics and electrical controls. This expert had sole responsibility for designing, installing, programming and startup of CNC for manufacturing machine equipment, including selection of components, ladder logic programming, modification of machinery, and machine design. This expert holds two U.S. Patents and is working on two others. This expert has been engaged as an expert witness in a number of cases.


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Expert Witness #257821

This expert is a Chair of Engineering and Professor in the Department of Electrical and Computer Engineering. This expert held a variety of engineering positions in industry. This expert has practiced as an independent professional engineer. This expert’s practice areas include digital systems design and analysis, computer architecture, computer systems security, embedded systems, and signal processing algorithms. This expert is an author or co-author of over 250 technical articles and five books and is a named inventor on five US patents and five provisional or patents pending. This expert has consulted with and performed sponsored research for several different federal government agencies and industrial organizations. This expert’s research activities generally revolve around modeling, simulation, formal verification, and design of digital systems including both conventional electronic and emerging technology implementations.

This expert wrote machine-code designed to purposely exploit design errors and to invoke the test circuitry in the chip. In academia, this expert has taught digital design at the introductory and advanced levels, including embedded systems design, programmable logic, and ASIC. All of these classes include the teaching of test methods as a critical part of classes. This expert is also familiar with test standards for BIST including JTAG 1149.1, etc.

This expert has worked with both plaintiffs and defendants and has experience testifying in depositions and trials. This expert is an author of numerous expert reports and declarations for the plaintiff and defense, and also numerous declarations and IPR-related reports. Other experience includes pre-filing/due diligence analysis, prior art searching and analysis/rebuttal, forensics, reverse engineering, software/firmware/HDL listing analysis, drafting infringement, invalidity, and rebuttal contentions, claim construction/Markman preparation, tutorial development, direct examination Q&A drafting. This expert is a named inventor on five US patents and five patent applications.


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