Human Factors MD
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Human Factors MD
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OUR TEAM

We have a talented team of human factors experts with decades of experience with clinical end-users and patients, researching, designing, and evaluating products. Here is a serious but fun look at each of us.


Christina Mendat, PhD

Liz Mauer, MHCI

Liz Mauer, MHCI

MANAGING DIRECTOR 

 As our Managing Director, Christina runs the operations of the company and provides technical oversight of all programs. She has over twenty years of experience in human factors and has spent (and continues to spend) countless hours in human factors testing sessions. While Christina is intimate and well-versed in many clinical applications and spaces, her passion is in helping companies make their products meet the needs and capabilities of lay people. 


In addition to her professional expertise, she has the uncanny ability to sing the lyrics to almost any song (in key) and is the reigning champion of the lab's annual high kick contest. 


Christina has a Ph.D. in experimental psychology and ergonomics from North Carolina State University and is also a Certified Cage Rattler. 

Liz Mauer, MHCI

Liz Mauer, MHCI

Liz Mauer, MHCI

SENIOR TECHNICAL DIRECTOR

Liz has been a committed, principled, and passionate human factors practitioner for 20 years.


As a Senior Technical Director, Liz is responsible for providing human factors strategy, oversight, and execution for both medical devices and combination products for our clients. 


She's a critical thinker and problem solver who actually enjoys sifting through mountains of data and information in order to identify actionable insights and opportunity areas, and she takes a lot of pride in communicating these things effectively through reports that tell a story.


While Liz has experience across many different user groups and clinical applications, her real passion is in helping companies bring commercially viable products to market that will meet the needs and capabilities of ALL people. She firmly believes that every person has a fundamental right to understand how to manage their own health and that of their families - not just those who were lucky enough to have access to money, high quality education, and healthcare.

CORINNA PROCTOR, MS

Liz Mauer, MHCI

CORINNA PROCTOR, MS

SENIOR TECHNICAL DIRECTOR

Corinna has 20+ years of experience employed in the field of Human Factors. She has worked in a variety of domains including medical hardware, health IT, and consumer / commercial IT product and software development. Corinna has conducted countless hours of user testing and is passionate about fixing a product or software design issue at its core rather than adding extra sentences to a user guide as a means to prevent use problems. 

Corinna loves to ask 'why is this here' and 'does this really matter' as much as she loves Rafa Nadal, dogs, clutter-free kitchens, and her family who likes to clutter-up that kitchen counter. Corinna hates horror movies and people who drive too close to cyclists. Corinna holds a Master’s Degree in Cognitive Psychology from North Carolina State University and can't wait to work with you on your next HF program! 


HEATHER COLBERT, BASC, PENG, CHFP

HEATHER COLBERT, BASC, PENG, CHFP

HEATHER COLBERT, BASC, PENG, CHFP

TECHNICAL DIRECTOR 

Heather has over 20 years of experience conducting Human Factors evaluations of advanced technology in complex, safety-critical environments. Since 2007 her primary focus has been healthcare, in particular formative and validation studies for medical devices. She is a licensed Professional Engineer and Certified Human Factors Professional.  

VINCE VELOCCI, MSC, BASC

HEATHER COLBERT, BASC, PENG, CHFP

HEATHER COLBERT, BASC, PENG, CHFP

QUALITY MANAGER AND TECHNICAL DIRECTOR 

Occasionally mistaken for an older silverback gorilla, Vince has spent most of his 35-year professional career designing and evaluating medical software and devices. He has completed all manner of human factors projects, from contextual inquiry studies to formative and validation testing. He doubles as the quality manager and the go to security guy as needed.


Vince was on the 8 year plan at the University of Toronto - trained in Pharmacology, Physiology, Biomedical and Electrical Engineering and has probably forgotten more than most people will ever learn.  For fun he spends time with his dog daughter Lucca, plays competitive hockey, but is happiest cycling and drinking the fine wines of France and Italy - occasionally at the same time.

LAUREN HORN, PHD

HEATHER COLBERT, BASC, PENG, CHFP

LAUREN HORN, PHD

TECHNICAL DIRECTOR  

Lauren has over 15 years of experience in human subjects research and 6 years of experience conducting Human Factors evaluations with a focus on medical devices and combination products.


Lauren received her PhD in Aging Studies/Biomedical Engineering from Tulane University School of Medicine and a BS in Biomedical Engineering from George Washington University. In her free time, she enjoys camping in the great outdoors, supporting the live music scene in her hometown of New Orleans, and gardening.   


KELLY SEAGREN, MS

MARISSA KARAGIANNIS, BA

MARISSA KARAGIANNIS, BA

SENIOR HUMAN FACTORS SPECIALIST

Kelly has over 18 years of industry experience in human factors, ergonomics, user experience research and process engineering within consumer product development and manufacturing. Though newer to the world of medical devices, she is excited to apply her interest and experience in improving product design and process improvement to this very important area. She enjoys advocating for the user and making products easy to use correctly, safely, and efficiently. Kelly holds a BS in mechanical engineering from Valparaiso University and an MS in Human System Integration from The Ohio State University. 

When not running research or analyzing data, you can find her hiking with her dog Sachi, playing volleyball, exploring new cities and countries, or enjoying a cold beverage on a patio. 

MARISSA KARAGIANNIS, BA

MARISSA KARAGIANNIS, BA

MARISSA KARAGIANNIS, BA

 HUMAN FACTORS LAB MANAGER 

Marissa fell in love with human factors after participating in a usability study several years ago. Fast forward - now she has over 9 years of experience in the field of HF and spends countless hours conducting, facilitating, and planning human factors studies. 

As our HF Lab Manager, Marissa oversees operations of our Charlotte lab, ensuring it is always prepared to deliver seamless, high‑quality research experiences. She is especially passionate about coordinating logistics so clients, team members, and participants feel welcomed have an enjoyable study experience. 

Marissa holds a Bachelor’s degree in Health Communication and Public Health from the University of North Carolina at Charlotte. Outside of work, she loves traveling the world and cooking new dishes.   

Matthew Pacailler, PHD

MARISSA KARAGIANNIS, BA

Matthew Pacailler, PHD

HUMAN FACTORS SPECIALIST

Matthew was introduced to human factors during his first internship, where he learned how to conduct usability testing with medical devices. Since then, he has spent the past five years studying human factors while simultaneously applying HF principles in local hospitals and within the healthcare and simulation fields. Given this, Matthew is eager to contribute and grow in the world of human factors for medical devices. 


Matthew holds a PhD in Human Factors Psychology from Old Dominion University. When he’s not thinking about design, you can likely find him hanging from the lab’s pull-up bar. Outside of work, he enjoys exercising, dancing salsa, reading, and playing games. 


ASHLEY LANCE, BS

ANGELA HOCK, RN, BS, BSN

ASHLEY LANCE, BS

 LAB ADMINISTRATOR  


Ashley has over 20 years of experience in management and business administration. She makes sure that the lab is run like a well-oiled machine during our study weeks and that we are ready for anything before a study even starts. She has her bachelors from Appalachian State University, go Mountaineers!

JASON DUNHAM, BS

ANGELA HOCK, RN, BS, BSN

ASHLEY LANCE, BS

MANAGER OF FINANCE AND ADMINISTRATION

Jason is our Manager of Finance with over 15 years of experience in corporate accounting. He earned a Bachelor of Science in Business Administration with a Concentration in Accounting from East Carolina University. 


When he is not in the office crunching numbers, you can catch him on the golf course trying to avoid sand traps - FORE! 


ANGELA HOCK, RN, BS, BSN

ANGELA HOCK, RN, BS, BSN

ANGELA HOCK, RN, BS, BSN

CLINICAL CONSULTANT   

Angela has 23 years of experience in healthcare as a registered nurse. Her clinical experience includes: cardio, neuro, ortho, trauma, peds, dialysis, oncology, surgery, respiratory diseases, debility and medically complex patients. Angela holds degrees from Penn State University and University of NC at Charlotte.   



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