Meet the Riverside Team
In-person therapy and psychological assessments in Grand Rapids, Byron Center & Kalamazoo
Virtual therapy anywhere in Michigan.
Compassionate, Evidence-Based Therapy for Adults, Adolescents, Couples, and Families Across Michigan
Patrosky Anderson, MA, LLPC
Psychotherapist
Patrosky is a Limited Licensed Professional Counselor (LLPC) with a Master’s degree in Clinical Mental Health Counseling and 28 years of experience in pastoring and mentoring. He specializes in helping individuals navigate relationship challenges, anxiety, life transitions, and emotional wounds through a deeply relational and present-focused approach. Patrosky draws from Gottman-Institute Level 1 training and emphasizes emotional safety, curiosity, and the power of personal ownership in the healing process. His style is relaxed, grounded, and collaborative, creating a space where clients feel seen, supported, and empowered to grow.
Contact: panderson@riversideprofessionals.com
Mark Holloway, MA, LPC
Psychotherapist
Mark is a Master’s Level Therapist with over eight years of experience helping individuals achieve their personal goals and live more fulfilling lives. He holds a Master of Arts degree in Clinical Mental Health Counseling from Grand Rapids Theological Seminary. Mark believes that healing begins in a safe, trusted environment, where a strong therapeutic relationship serves as the foundation for growth. He has extensive experience working with children, adults, and couples on a wide range of concerns including anxiety, depression, ADHD, addictions, personality disorders, marital and relationship conflicts, communication challenges, crisis, and infidelity, among others. Drawing from a variety of evidence-based approaches, Mark empowers clients to confront challenges, make meaningful changes, and build the tools needed for a vibrant and abundant life.
Contact: mholloway@riversideprofessionals.com
Brittney Wagenveld, LMSW, CCATP, CCATP-CA
Psychotherapist
Brittney is a Licensed Master’s Social Worker with a specialization in anxiety disorder treatment (GAD, Social Anxiety, Panic Disorder, Phobias, OCD, Separation Anxiety, Selective Mutism), along with child and adolescent counseling ranging ages 6-21. Brittney has additional clinical experience in treating depression, mood disorders, behaviors, school issues, anger, transitions, self-esteem, ADHD, & more.
Contact: bwagenveld@riversideprofessionals.com
Mary Westergren, MA, LPC, LMHC, LCPC, LPCC
Psychotherapist
Mary is a Licensed Professional Counselor (LPC) with a Master’s Degree in Clinical Psychology from Wheaton College (IL) and 13 years of experience in the field. She specializes in marital/relationship distress, unpacking the wounds of childhood that affect us today, and exploring ways of dealing with both anxiety and depression. She is trained in both EMDR (Eye Movement Desensitization and Reprocessing) and EFCT (Emotion Focused Couple’s Therapy), and has 40 years of experience working with expats working abroad. Licensed in four Midwest states, she’s available for telehealth therapy in MI, IN, IL, and OH.
Contact: mwestergren@riversideprofessionals.com
Kreg Westergren, LPC, NCC, ADHD-CCSP - Candidate
Director/Psychotherapist
Kreg is a Licensed Professional Counselor and National Certified Counselor specializing in trauma, anxiety, depression, and life transitions. He is trained in EMDR therapy and works with individuals to process past experiences and build confidence. Kreg also has extensive experience helping adults and couples navigate relationship challenges, stress, and emotional health. His supportive and personalized approach empowers clients to find balance, clarity, and lasting change.
Contact: kwestergren@riversideprofessionals.com
Dr. Andrew Wichterman, LPC, LPC-S
Clinical Assessor, Supervisor & Psychotherapist
Andrew is a Licensed Professional Counselor with over 18 years of experience in therapeutic, academic, and psychological testing settings. He offers ADHD evaluations for children and adults through a lens that honors each individual’s emotional, cognitive, relational, and spiritual health. Dr. Wichterman is known for his compassionate and thorough approach—providing not just diagnostic clarity, but also personalized, sustainable treatment strategies that often go beyond medication. Clients consistently feel respected, seen, and guided with care throughout the assessment process.
Contact: awichterman@riversideprofessionals.com