Dr. Everhart is board certified in clinical neuropsychology (ABPP-CN) and uses electrophysiology (i.e., EEG and ERPs) to investigate relationships between variables such as emotion processing, personality attributes, neurophysiology, and risk factors for cardiovascular disease. He co-directs the Cognitive Neuroscience Laboratory at East Carolina University with Dr. Ervin Davis. He also collaborates with Dr. Heath Demaree, who is at Case Western Reserve University. Dr. Everhart is also certified in Behavioral Sleep Medicine (CBSM) and the American Academy of Sleep Medicine (AASM) and he is the Director of Research at the Sleep Center at Pitt County Memorial Hospital. The Sleep Center is actively involved in clinical trials and investigator initiated research. His primary collaborator is Dr. Daniel Lee, who is the medical director of the Sleep Center.

Dr. Everhart's research interests include neurocognitive impairment associated with various sleep disorders (i.e., apnea, insomnia, narcolepsy), personality attributes that contribute to treatment compliance, and electrophysiological correlates of sleep disorders.