Power Electronics Engineer

CHARLES HOLMES

*** ***** ****** **** • Escondido, California 92025

760-***-**** • *******.***.******@*****.***

POWER ELECTRONICS ENGINEER

New Product Development • Emerging Technologies • Global Team Collaboration

Seasoned and successful power and electronics engineering professional with over 20 years of experience in designing cutting-edge new products to improve market position and expand company offerings. Demonstrated track record of delivering new products on-time/on-budget, with proven skills in global team leadership, customer support, and budget optimization. Adept at analyzing and designing circuits and systems and pursuing groundbreaking work with microcontrollers. Holds 6 U.S. patents. Areas of expertise:

New Product Development • Circuit & Systems Analysis/Design • Magnetic Component Design

Microcontrollers • Team Leadership • Power Inverter/Converter Design • Customer Relations • Energy Storage Systems • AC/DC Power Systems • Uninterruptible Power Supply (UPS) • Instrumentation

PROFESSIONAL EXPERIENCE

TEAL ELECTRONICS, San Diego, California • 2007-2009

A $50M designer/manufacturer of custom power subsystems for OEMs; a division of SL Industries.

Senior Electronics Engineer

Played key role in medical application development by designing 3-phase AC power distribution system, involving voltage regulation, filtering, and isolation in 50kVA-125kVA power range. Contributed to military application by designing ultra-capacitor-based uninterruptible power systems. Consistently fulfilled diverse customer requirements by tuning digital feedback control systems of AC voltage regulators. Optimized minimal budgets to ensure outstanding product delivery.

• Completed successful effort to replace outdated product while fulfilling extensive requirements for medical electromagnetic compatibility and safety by creating 125kVA voltage-regulating AC power distribution unit.

• Avoided loss of major customer by providing on-site UAT guidance for Japan-based customer; won Quality Superstar Award.

• Positioned company to enter military test system market by successfully designing ultra-capacitor based UPS systems for U.S. Navy application.

HEWLETT-PACKARD COMPANY, San Diego, California • 2002-2007

A multinational technology firm. San Diego division designs multifunction and Photosmart printers.

Electrical Engineer

Fulfilled multiple roles of increasing authority to reach EE level, including Power Supply Specialist and User Interface Specialist. Initially challenged to resolve power supply issues; created power supply specifications, collaborated with vendors to ensure product alignment with performance, quality, and budget guidelines, and established automatic test system. As UI Specialist, improved printer products by designing control panels, including color graphic display, touch screen control, and discreet push buttons, involving C-based microcontroller. Liaised with global team members.

• Played key role in salvaging HP quality reputation by skillfully resolving power supply problems as Power Supply Asset Team Member.

• Ensured smooth transition of new control panels to production by traveling regularly to production sites in Singapore and Malaysia.

CHARLES HOLMES • Page 2 • *******.***.******@*****.***

METALLIC POWER INC., Carlsbad, California • 2001-2002

A start-up, VC-funded developer of zinc-air regenerative fuel cell technology.

Senior Electronics Engineer

Played instrumental role in showcasing cutting-edge technology and attracting additional VC interest and funding by designing power electronics equipment.

• Contributed to developing electric car by designing main propulsion power electronics and magnetics, involving a multi-redundant, fault-tolerant system with multiple inverters and fuel cells. Secured patents for multi-redundant components.

• Created instrumentation system to measure molarity of zincate ions in fuel cell’s potassium hydroxide electrolyte for electric car’s fuel gauge. Achieved patent for system.

• Enabled instrumentation for the car’s numerous fuel cells by designing multiplexing system to monitor cells with 1 instrumentation set. Earned patent for system.

• Spearheaded design of UPS for cell phone base station market, involving ultra-capacitor energy storage system to support load during fuel cell start-up.

ELGAR CORP. (Now Ametek Programmable Power), San Diego, California • 1998-2001

A power electronics developer specializing in laboratory-grade, programmable AC and DC power supplies and solar cell simulators.

Senior Engineer for AC Power Systems

Expanded company’s range beyond high-end, high-cost AC applications by developing mid-performance, low-cost AC power supplies. Collaborated with team to create new product family, involving single-phase and multiphase AC power supplies for 1kVA-20kVA power range. Contributed to Sorensen Division to create the DLM family of 4kW DC power supplies.

• Leveraged low-cost microcontroller and analog circuitry to develop outstanding low-cost products, still currently on market.

EARLY CAREER

DELTEC ELECTRONICS, San Diego, California

Senior Engineer

Led development of the Magellan product family of uninterruptible AC power systems.

HEART INTERFACE, Kent, Washington

Director of Engineering / Chief Engineer for New Product Development

Managed comprehensive engineering department activities. Developed Freedom product family of AC power systems.

TOPAZ / SQUARE D, San Diego, California

Uninterruptible Power Systems Project Manager

Progressed through multiple roles of increasing authority to reach PM level. Designed company’s 1st microcontroller-based product. Pioneered average current mode control for inverter application. Developed new ac voltage regulator technology. Earned 3 patents and won 2 Square D Awards for Excellence in Science and Technology.

EDUCATION / PROFESSIONAL DEVELOPMENT

Electrical Engineering

San Diego State University, San Diego, California

Multiple Industry Seminars in Power Electronics

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