ABOUT US

HFCSI was founded in 2006 in Los Angeles, California and operates in the U.S., Europe, Asia, and Australia
Our team members have Graduate level training in HF psychology, engineering and advanced research methods
To date, we have conducted usability testing with approximately 5,000 users world-wide…and counting!
We cover HF/Usability needs in all phases of medical product development
Our specialists can integrate seamlessly with your cross functional teams
HFCSI adapts to tightening deadlines or changing requirements
Our team maintains high standards of quality, service and on-time delivery
We have a proven 15+ year track record of successful performance

Mike Kasamanian
President

Mike Kasamanian
President
Mike Kasamanian is President at HFCSI and provides expertise in the areas of Human Factors and Technology application. He holds a M.A. degree in Human Factors Applied Psychology and is a certified Quality Function Deployment (QFD) Green Belt. He is an active member of the Human Factors and Ergonomics Society (HFES) and the Association for the Advancement of Medical Instrumentation (AAMI). Mike's expertise includes the following domains: Voice-of-Customer research, User Requirements, Wireframing, Hardware User Interface Design, Rapid Prototyping of Electromechanical devices, FDA verification/validation testing, K-12 instruction, Field Robotics, Multimedia Systems, Acoustic Analysis, and project management.
Zachary Chesler
Managing Director

Zachary Chesler
Managing Director
Zachary Chesler is Managing Director at HFCSI and has over fifteen years experience as a user experience designer and usability researcher. As a specialist in this field, he has worked on projects across several industries including medical/healthcare, training/education, automotive, entertainment, energy management, and digital publishing. Since 2010, Zachary's primary focus has been in the healthcare space, with a specialization in the design and evaluation of medical devices, software, and mobile apps. Zachary earned his Bachelor's degree from University of California, Santa Barbara and a Master's Degree in Human Factors Applied Psychology from California State University, Northridge.
Wei-Ting Xie
Sr. Human Factors Manager

Wei-Ting Xie
Sr. Human Factors Manager
Wei-Ting Xie is Senior Human Factors Manager at HFCSI and has over 10 years of experience in medical Human Factors. She has expertise in leading and designing human factors research, conducting human factors analyses, developing user requirements, and wireframing / prototyping. Wei-Ting holds a master’s degree in Human Factors and Applied Psychology from California State University, Northridge. In her spare time, she enjoys hiking and is an avid crafter who loves all projects “DIY."

Leah Gudiel
Principal Human Factors Engineer

Leah Gudiel
Principal Human Factors Engineer
Leah Gudiel is a Principal Human Factors Engineer with experience in software usability evaluations, concept sketches, flow charts, task analysis and usability testing. She holds a Bachelor's Degree in Graphic Design and a Master's Degree in Human Factors & Applied Psychology. Her background in design helps in optimizing prototypes in the creative process to receive the best feedback from potential customers. She enjoys attending music festivals, wine tastings, and exploring faraway countries.
Veronica Mendez
Principal Human Factors Engineer

Veronica Mendez
Principal Human Factors Engineer
Veronica Mendez is a Principal Human Factors Engineer with a demonstrated history in working with the design of university websites, various application software and medical devices. She is skilled in wireframing, persona development, user needs requirements, protocol development, usability testing (both formative and summative), data analysis and report writing. Veronica graduated cum laude from California State University, Northridge with a Bachelor of Arts Degree in Psychology (minor in Ethnic Studies). Veronica went on to earn a Master of Arts Degree in Human Factors and Applied Psychology from California State University, Northridge.
Isis Chong
Principal Human Factors Engineer

Isis Chong
Principal Human Factors Engineer
Isis Chong is a Principal Human Factors Engineer with over a decade of experience in human factors and experimental psychology. Isis is experienced with applying human factors principles to the design, evaluation, and validation of various medical devices. Isis holds a PhD in Cognitive Psychology from Purdue University and a MS in Human Factors Psychology from California State University, Long Beach.

Vanui Barakezyan
Sr. Human Factors Engineer

Vanui Barakezyan
Sr. Human Factors Engineer
Vanui Barakezyan is a Senior Human Factors Engineer who was trained to the Master's level in Human Factors at California State University, Long Beach. She has a BA in Psychology from California State University, Northridge, and an AA in Aviation Science and Commercial Flight. She loves cognitive psychology, attention, and perception. Vanui is a private pilot.
Kevin Lee
Sr. Human Factors Engineer

Kevin Lee
Sr. Human Factors Engineer
Kevin is a Senior Human Factors Engineer with experience in web and interface usability. He has worked in government, and academia helping organizations optimize their interface designs as well as educating teams on user experience prior to joining HFCSI. He received his Master's in Human Factors from the University of Idaho and a Bachelors in Psychology and Asian American Studies from California State University Northridge. In his free time he enjoys working on and driving cars, spending time outdoors and drinking boba.
Yair Villanueva
Human Factors Engineer

Yair Villanueva
Human Factors Engineer
Yair is a Human Factors Engineer at HFCSI. He received his Bachelor’s Degree in Psychology from California State University, Northridge, and is finalizing his Master’s Degree in Service Design from Politecnico di Milano in Italy. His multidisciplinary background allows him to adapt his skillset to the customer and task at hand. He loves traveling, trying new restaurants, and card games.

David Hermoza
Human Factors Engineer

David Hermoza
Human Factors Engineer
David Hermoza is a Human Factors Engineer at HFCSI with experience in Medical Human Factors. He is a member of the Human Factors and Ergonomics Society (HFES). David earned his Bachelor’s degree in Cognitive Science from University of California, San Diego and is currently completing a Master’s degree in Human Factors from California State University, Long Beach. David focuses on FDA-guided formative and summative Human Factors evaluations, as well as Human-Computer Interaction principles, especially Trust in Automation theories. In his spare time, he likes sketching, watching movies at the movie theater, and visiting National Parks.
Arturo Perez
Human Factors Engineer

Arturo Perez
Human Factors Engineer
Arturo Perez is a Human Factors Engineer with over 4 years of research experience. Arturo’s journey into human factors began with B2C sales. He became enthralled by the way products meet users’ needs. Arturo then realized that he needed to be an advocate for users. Thus, he earned his BA in Psychology (Minor in Marketing), and is studying towards his MS in Human Factors at the University of Idaho. Arturo’s background in B2C sales, psychology, and research qualify him to put users first.
Winnie
Team Mascot

Winnie
Team Mascot
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You?
Human Factors Jedi

You?
Human Factors Jedi
If you are interested in joining our team at HFCSI, please send a message to info@hfcsi.com and tell us a little about yourself!

We are active, contributing members of the following industry organizations, including the authoring of best practice documents/standards, and teaching HF training courses.

Shoot us an email at info@hfcsi.com to ask about our 3-day Usability Testing workshops for Medical Devices with Marcus Evans; Learn the latest best practices to plan studies, stay compliant with agency expectations, and convert data to actionable insights. Get the inside scoop on ways to efficiently scale the level of Human Factors effort and demonstrate due-diligence.