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(517) 337-2900
(517) 337-2900

Who We Are

J. Keith Ostien, Ph.D. has been a Licensed Psychologist since 1981. Dr. Ostien founded Comprehensive Psychological Services, PC in July 1984 and is the Director of the clinic. He completed his Ph.D. at Michigan State University in 1979. Dr. Ostien is a member of the American Psychological Association, Michigan Psychological Association, National Academy of Neuropsychology, National Register of Health Service Psychologists, and is a Diplomate in the American Psychotherapy Association. Dr. Ostien’s practice is focused in the areas of conducting psychological and neuropsychological evaluations with adults with a variety of psychological, cognitive, behavioral, and neuro-degenerative disorders. The results of these evaluations contribute to accurate diagnosis of the person's condition and the development of comprehensive treatment programs. Dr. Ostien also provides individual psychotherapy with adults and consultation within the community.  Lastly, Dr. Ostien supervises Ph.D. candidates in the Clinical Psychology Department at MSU in the administration, interpretation of data, and writing of psychological evaluations.
Timothy L. Goth-Owens, Ph.D. is a Licensed Psychologist who has been affiliated with Comprehensive Psychological Services, PC since 1986. He specializes in the assessment and treatment of children, adolescents, college students and their families. He has a particular interest in working with those who experience problems in the regulation of mood, anxiety, attention and academic performance. Dr. Goth-Owens works collaboratively with clients to develop a clear understanding of their individual goals and their strengths and weaknesses. Generally, his treatment approach is to help individuals and families develop specific self-regulatory skills that enable them to better achieve their goals. Dr. Goth-Owens earned a doctoral degree from Michigan State University (MSU), with a specialty in child and family clinical psychology. In addition to his clinical practice at CPS since 1986, Dr. Goth-Owens worked for seven years in a Community Mental Health setting providing intensive services to severely impaired children and adolescents and three years as a pediatric psychologist with MSU’s College of Human Medicine, Department of Pediatrics and Human Development. Since 2004, he has served as a consultant to MSU’s Resource Center for Persons with Disabilities where he leads a study skills seminar for MSU students with learning disabilities and related conditions. Dr. Goth-Owens has held an appointment as an Adjunct Assistant Professor with MSU’s Department of Psychology since 1994. In this capacity he has taught at the undergraduate and graduate levels, supervised clinical psychology graduate students at the Michigan State University Psychological Clinic, and consulted on National Institute of Health funded research program investigating developmental and neuropsychological aspects of Attention-Deficit/Hyperactivity Disorder.
Steve M. Geiger, Ph.D. is a Licensed Psychologist. Dr. Geiger received his Ph.D. from the University of Iowa in 1982 and was a certified psychologist in Illinois before coming to Michigan in 1985. As a licensed psychologist in Michigan since 1986, he initially worked at St. Lawrence Hospital in their inpatient and outpatient psychological and addictions programs. Dr. Geiger has enjoyed teaching addictions, assessment, ethics and counseling theory courses at Michigan State University since 1987. Dr. Geiger began his practice at Comprehensive Psychological Services in 1987 and has focused on psychological evaluations and providing individual psychotherapy with regard to addictions, anxiety disorders and depression. His counseling approach includes a combination of cognitive behavioral and interpersonal techniques.
Maryanne K. Boltz, LMSW is a Licensed Social Worker. Maryanne treats clients across the entire mental health continuum enjoying particularly work with men and women in transition - love, loss, relationships - across the developmental spectrum (e.g., issues of maturation/developmental crisis in young adulthood, parenting issues, marital conflict, middle age identity issues, menopause, retirement adjustment). Maryanne has been practicing since 1970 when she received her MSW from Syracuse University. Maryanne also has an MA from Tufts University in Child Development. She currently treats adults in an inpatient psychiatric setting as well as in individual private practice sessions. Maryanne has been an Adjunct Associate Professor in the Department of Psychiatry, MSU College of Human Medicine since 2006.
Carol C. Laub, Ph.D. is a Licensed Psychologist. Dr. Laub joined CPS in 1997, providing clinical services to children, adolescents, adults, and families. Dr. Laub received her Master's and Doctorate degrees in child and family clinical psychology from Michigan State University. She completed a pre-doctoral internship and post-doctoral fellowship in child/family clinical and pediatric psychology through the College of Human Medicine at MSU. Dr. Laub primarily uses cognitive-behavioral and family-systems therapies, but treatment is tailored to the needs and concerns of each individual and family. Dr. Laub works with children and adolescents ages 1 to 18, and adults of all ages. Her areas of specialty include: anxiety, OCD, depression, adjustment difficulties, behavior problems, learning difficulties, ADHD, grief and loss, developmental disabilities, chronic illness, and women's issues.
Steve Cottrell, LMSW, ACSW is a Licensed Clinical Social Worker. He is a Michigan State University graduate. Steve has been practicing since 1986. He specializes in treating mood and addiction disorders. He provides therapy to teens, adults, and couples. He is a Health Professional Recovery Program provider. Steve also works at Sparrow Hospital as a therapist treating individuals and groups with addiction and affective disorders. Steve also supervises Master's level students from Michigan State University, Western Michigan University, and Spring Arbor University.
Jon Shy, Ph.D. is a Licensed Psychologist. Dr. Shy completed his Ph.D. at Florida State University and joined CPS in 2008. Dr. Shy performs comprehensive psychological and psycho-educational evaluations with children, adolescents, and adults to assess a wide variety of psychological conditions, including learning disabilities and ADHD. Dr. Shy conducts neuropsychological evaluations for adults and the elderly. Referral questions for neuropsychological evaluations frequently involve making differential diagnoses between Dementia and other forms of cognitive impairment. He also provides individual and family psychotherapy to adolescents and adults. Treatment specialties include posttraumatic stress, depression, anxiety, and career and life transitions.
Timothy J. Wulff, LMSW, ACSW is a Licensed Social Worker. He earned his MSW at Michigan State University. Timothy provides psychotherapy for individuals who present with a wide variety of symptoms and crises. After many years of working with people, Timothy has narrowed his practice with a focus on addiction and mood disorder. More recently, Timothy has begun work using Eye Movement Desensitization and Reprocessing (EMDR) therapy. This will expand his focus to trauma victims as well as those looking to enhance performance in a variety of areas including school and athletics.
Kimberly Podmore, LMSW, CAADC is a Licensed Clinical Social Worker and Certified Advanced Alcohol and Drug Counselor. She provides therapy for adults, children, couples and families that present with a wide range of symptoms to help them navigate life’s challenges to find hope and healing. She is experienced in helping people with depression, anxiety, trauma, addictions, grief and loss, parenting concerns, behavioral issues, adjustment difficulties, life transitions, and relationship difficulties. Kimberly uses a variety of psychotherapy techniques to individualize treatment to her client’s needs. She has experience with psycho-social and substance abuse assessments as well. Kimberly received her MSW from Michigan State University, with a focus on Clinical Practice with Children and Families. She is certified as an Advanced Alcohol and Drug Counselor (CAADC) through the Michigan Certification Board of Addiction Professionals.

Kamara L. Marsh, MA, LPC, CAADCis a Licensed Professional Counselor and Certified Advanced Alcohol and Drug Counselor. Kamara received her Master’s degree in counseling with an emphasis in treatment of addictions from Spring Arbor University. She completed her counseling internship at Hope Network Rehabilitation Services where she worked with individuals with traumatic brain injuries and addressed issues such as: post-traumatic stress, grief and loss, depression, anxiety/panic, addictions, and re-entry difficulties. She spent a decade facilitating substance abuse re-entry groups at Ingham, Clinton, and Eaton County Jails and six years working for Barry-Eaton District Health Department where she received training and experience in a variety of holistic approaches in the treatment of both mental health and substance abuse disorders. Kamara has provided clinical services in residential programs, intensive outpatient programs, and outpatient treatment settings with both adolescents and adults. Kamara utilizes a variety of clinical interventions, to include: Cognitive-Behavioral Therapy, Motivational Interviewing, Behavioral Interventions, Art Therapy, and Emotional Freedom Techniques with individuals, couples, families, and groups.

Jennifer Thompson, PsyDis a Licensed Psychologist. She has practiced in various 
clinical settings since 2001, conducting psychological assessments and psychotherapy. Dr. Thompson joined CPS in 2015. She received her master’s and doctoral degrees from the Chicago School of Psychology and has previously worked in inpatient hospital, community mental health, and private practice settings. ​Dr. Thompson is a member of the American Psychological Association and the Michigan Psychological Association.  Her treatment interests and areas of expertise include attachment-based psychotherapy, the treatment of mood disorders (including depression and anxiety), working with the impact of trauma, and helping people manage difficulties with relationships.  Assessment interests include comprehensive diagnostic assessments to rule out diagnoses of psychosis, mood disorders, personality disorders, learning disorders, and ADHD.  Dr. Thompson also has strong interest in working with issues of culture, identity, and diversity. She works with people across the lifespan in both individual and family contexts.  In addition to direct clinical work, Dr. Thompson has significant experience supervising doctoral and post-doctoral psychology students and fellows.
Craig Mefford
Craig S. Mefford, PsyD, is a Limited License Psychologist. Since 1994 he has practiced neuropsychology and psychotherapy within the greater Lansing area. He obtained his B.A. from Michigan State University, M.A. from University of Detroit Mercy, and PsyD in clinical psychology from Wheaton College (IL).  He obtained a post-graduate certificate in clinical neuropsychology from Fielding Graduate University, and a post-doctoral fellowship with Neuropsychological Services of Lansing, MI. Dr. Mefford has extensive experience in assisting patients with neuropsychological testing and psychotherapy treatment following traumatic brain injury (TBI), stokes, brain tumors, toxic exposures, dementias and other health-related psychological problems. He also provides neuropsychological consultations for the Sparrow Healthcare Network.  Dr. Mefford’s clinical interests include co-occurring conditions of complex concussions, PTSD, anxiety, depression, cognitive remediation, mood dysregulation, ADHD, lifestyle adjustments, and identity development.  Research and lecture topics include TBI, sports concussions, brain-based behaviors and strong relationships.  Dr. Mefford served in the United States Marine Corps and is a member of the National Academy of Neuropsychology, Christian Association of Psychological Studies, and the American Psychological Association, Division 40 (neuropsychology).
Jennifer Kreft
Jennifer Kreft, LMSW is a Licensed Clinical Social Worker who has worked with children, adolescents, adults, and older adults since 2004.  Jennifer completed two Master’s Degrees at Michigan State University, the first in Counseling and the second in Social Work.  She has experience in child development, social and behavioral concerns, and adjustment difficulties in school and home environments.  Jennifer has a special interest in the development of attachment and social functioning of children, as well as those living with ADHD.  She also is experienced in helping people with concerns specific to women’s issues, young adult concerns, career and/or educational changes, LGBTQ concerns, older persons and family adjustments, grief and loss, and those struggling with chronic mental illness.  Jennifer has expertise in working with those nearing the end of the life span with development of wishes and communication within their support system.  Her approach to psychotherapy is based around integrative and eclectic therapies, and the belief that the whole system of relationships is integral in gaining tools for creating better functioning, hope, trust, mindfulness, and healing.
Jennifer Kreft
Carol L. Dixon, LMSW is a Licensed Clinical Social Worker.  Carol received her Master’s Degree in Social Work from Howard University in Washington DC.  Since 1997 Carol has provided diagnostic assessments, psychotherapy, case management, and change management in various settings such as NIH/SAMHSA research and program grants, hospitals, foster care, insurance companies, substance abuse agencies, in-home service agencies, and Community Mental Health. Carol joined CPS in 2017. Across her career she has provided therapeutic interventions to children, adults, and families.  Her treatment interests lie in promoting wellbeing in the lives of individuals who may be struggling with depression, anxiety, trauma, addictions, parenting concerns, behavioral issues, adjustment difficulties, life transitions, and relationship difficulties.  Carol utilizes clinical interventions of Cognitive Behavioral Therapy, Motivational Interviewing, Solution-Focused Therapy, and Functional Family Therapy.
D. Ami Sung
D. Ami Sung, Ph.D., is a Licensed Psychologist.  Dr. Sung received her MA and PhD in Counseling Psychology from Boston College and Indiana State University.  Dr. Sung’s clinical interests include childhood developmental trauma, attachment and relationship injuries, PTSD, dissociation, mood/anxiety disorders, eating/body image concerns, cultural identity, acculturation, and religiosity/spirituality.  Her theoretical orientation involves an integrative approach primarily focusing on humanistic-experiential, relational psychodynamics, and mindfulness.  Dr. Sung enjoys working with clients from diverse cultural backgrounds, including international students, and is fluent in Korean.  She is a certified EMDR therapist (Eye Movement Desensitization and Reprocessing) and is a member of the EMDR International Association.
Jennifer Hahm, M.A.
Jennifer Hahm, Ph.D. is a Limited License Psychologist. She earned her M.A. in clinical psychology through the Michigan School of Professional Psychology. Dr. Hahm earned her Ph.D. in counseling psychology through Western Michigan University. She completed her doctoral internship at Pine Rest Christian Mental Health Services with rotations in neuropsychology and inpatient child/adolescent consultation. She has training in psychological and neuropsychological testing and assessment, sexual trauma/violence, suicide prevention, and multicultural counseling. Dr. Hahm's clinical interests include the treatment of depression, anxiety, relationship and family difficulties, stress related to life transitions, grief and loss, and trauma-related issues. She works with people across the lifespan, from young children to older adults in individual therapy, couples counseling, and family therapy.
Sharon Lo, Ph.D.
Sharon Lo, Ph.D. is a Limited License Psychologist. She earned her Ph.D. in clinical psychology from Michigan State University and completed her residency training at Packard Children’s Hospital at Stanford University and the Children’s Health Council Consortium. Dr. Lo specializes in working with children, teens, and their families, particularly those struggling with anxiety and self-regulation challenges. She has experience helping families address developmental pediatric concerns related to toileting and feeding, in addition to working with children adjusting to acute and chronic medical conditions. In addition to Dr. Lo’s clinical work at CPS, it is important to her to maintain an active research program which focuses on the basic maturational processes of self-regulation skills in young children and how to encourage the development of such skills to reduce health disparities and promote positive psychological wellbeing for children. To that end, she holds a position as a Postdoctoral Fellow with the Center for Human Growth and Development at University of Michigan, where she collaborates with interdisciplinary researchers and clinicians dedicated to integrating biology, behavior, and intervention science.

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CPS - Comprehensive Psychological Services, PC
2720 East Lansing Drive
East Lansing, MI 48823
Phone: 517-337-2900
Fax: 517-351-1279

Office Hours
Monday-Friday 8 a.m.-8 p.m.
Some Saturdays by Appointment Only
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