Markie Louise Christianson (L. C.) Twist, PhD, MEd, MA, BS, LMHC, LMFT, CSE, CSE-S, RegCOSRT (dr./she/they) dr. Markie is Teaching Faculty and the Graduate Student Research Chairperson in the Doctoral and Masters Couple and Family Therapy (CFT) programs, as well as the Sexuality Studies Certificates program, in the Relational Therapy Division at Antioch University (New England and Seattle campuses) in the Graduate School of Counseling, Therapy, and Psychology. dr. Markie is also the Session Instructor in the University of Guelph Professional Sexuality Practices Clinical Training Program in Guelph, Ontario, Canada. dr. Markie is a registered psychosexual and relationship therapist member of the College of Sexual and Relationship Therapists (COSRT), a licensed marriage and family therapist (IA, NV) and mental health counselor (IA), as well as a clinical fellow and approved supervisor of the American Association for Marriage and Family Therapy (AAMFT), and certified sexuality educator and supervisor through the American Association of Sexuality Educators, Counselors, and Therapists (AASECT). dr. Markie is co-author of the books, The Internet Family: Technology in Couple and Family Relationships, and The Couple and Family Technology Framework: Intimate Relationships in a Digital Age.  dr. Markie serves as the Editor-in-Chief of Sexual and Relationship Therapy: International Perspectives on Theory, Research and Practice. Some of dr. Markie’s honors include being the recipient of: the 2025 American Association of Sexuality Educators, Counselors, and Therapists (AASECT) Sexuality Educator Award and a 2017 Society for the Scientific Study of Sexuality (SSSS) Rising Scholar Emerging Professional Award.

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