Team

Leonardo Jose Trejo

Leonardo Jose Trejo

Founder & Chief Executive Officer

Dr. Trejo is a neuroengineering scientist with over 35 years experience in neuroscience, physiology, signal processing, human-computer interaction, human factors, neural networks, pattern recognition, and system modeling or analysis. His experience covers information sciences and technology, scientific visualization, virtual environments, vision research, neuroscience, human performance, neural networks, and the application of statistics and higher mathematical methods. He also has extensive knowledge and experience researching the anatomy, physiology and psychophysics of the mammalian visual system and human vision. He is an active participant in the research and development community, especially information sciences, life sciences, and human factors technology.

Roman Rosipal

Roman Rosipal

Chief Technologist

Dr. Rosipal is an applied mathematician with over 25 years experience in mathematical modeling, signal processing, pattern recognition, statistical methods, and algorithm development. He is a pioneer in the area of support vector machines, kernel machines, and kernel partial least-squares methods. He has worked with a variety of problems including meteorological data, chaotic times series, human physiological data, epileptic seizure prediction, and automated monitoring of anesthesia. He is a member in good standing of the Slovak Academy of Sciences. At PDT Dr. Rosipal develops algorithms for advanced EEG and ERP signal processing. He is also develops and executes statistical analysis plans for pharmacodynamic endpoints in clinical trials of novel drugs.

Christian Richard

Christian Richard

Scientific Software Developer

Dr. Christian Richard is a scientific software developer and statistical analyst with broad experience in software engineering using Python and R. At PDT he specializes in the analysis of electroencephalography (EEG) and event related potential (ERP) data sets. He also maintains and updates in-house Python software for signal processing and quality control of client neurophysiological data. In addition, Christian plays a major role in the development of statistical analysis plans suited to customer's experimental designs, R programming to implement custom statistical analyses, and generating scientific reports on completed analyses.

Justin Lawrence Hester

Justin Lawrence Hester

Research Software Developer

Justin Hester is a research associate and software developer with over five years of experience in applications to human brain electrophysiology. At PDT Justin has worked on a wide array of projects including generating analysis reports into Excel spreadsheets through Python and MATLAB, designing macros to preprocess raw EEG and raw ERP data in BrainVision Analyzer, analyzing EEG data with APECSgui (a PDT multiway analysis software). He has also written custom code in psychopy for PC-based psychophysiology tasks including MMN, P300, CDA, P50 and LANT. Justin has also supported several hardware and software deployments to test sites for clinical trials of novel drugs.

John Wallerius

John Wallerius

Machine Learning Engineer

John Wallerius is an experienced algorithm developer with a strong background in machine learning, statistics, computer vision and image processing. He has a proven track record for developing innovative new algorithms and improving existing algorithms. At PDT, John developed automated signal processing algorithms and software to compute scientifically valid endpoints for human brain electrophysiology studies. The automated software was validated against processing by trained analysts using commercial software and successfully applied in Phase I clinical trials for central nervous system drug development.

Cindy Liu

Cindy Liu

Director of Business Development

Ms. Shenghua (Cindy) Liu negotiates contracts and agreements pertaining to PACDEL services and the development of new business. She helps to plan projects, ensure compliance with requirements and timely completion of projects, and manage relationships with contractors and collaborators. She serves as the main liaison between PACDEL scientists and sponsors, contractors or vendors.