Nicholas started his career in human services at Northeast Treatment Centers in Philadelphia, PA where, over the course of 7 years, he worked as Youth Advocate for adjudicated adolescents, lead clinician for a community-based treatment team and outpatient therapist. After becoming a licensed psychotherapist in 2014, Nicholas worked as an outpatient therapist for multiple companies in the Philadelphia area where he helped clients manage or overcome symptoms related to anxiety, stress, trauma, depression and more.

Nicholas’ therapeutic approach is strongly rooted in humanistic psychology. As described in an article from the Association for Humanistic Psychology, this approach offers a "crucial opportunity to lead our troubled culture back to its own healthy path. More than any other therapy, Humanistic-Existential therapy models democracy. It imposes ideologies of others upon the client less than other therapeutic practices. Freedom to choose is maximized. We validate our client's human potential." Nicholas’ approach is also influenced by Buddhist and evolutionary psychology, which give insight into why our minds can work against us and what to do about it.