Meet Our Counselors


Tricia Prickett, LMFT

Tricia is a Licensed Marriage and Family Therapist with over 20 years of experience helping children, adolescents, and adults be the best they can be. Her Bachelor of Science Degree is from John Brown University and her Master of Arts was earned at Azusa Pacific University. Beyond her formal education she is grateful for all that she has learned from her clients, her husband, her children, and grandson. She is committed to continuing to learn new and better ways to help you face your challenges, build on your strengths, and reach your goals.

Tricia utilizes Cognitive Behavioral Therapy (CBT), Eye Movement Desensitization and Reprocessing (EMDR), and other interventions like play, art, crafts, journaling, relaxation, etc. to help you heal and grow. She knows that every client is unique and she is flexible in helping each person find the tools they need to live life more effectively. Tricia also offers Christian counseling for individuals who desire to include faith-based elements in therapy.

Tricia’s specialties include:

  • Anxiety, Depression, and Mood Disorders
  • Adjustment and Stress-related Disorders
  • Life Transitions
  • Grief and Loss Issues
  • Foster and Adoption Issues
  • Physical Disabilities
  • PTSD

Mary Landon, LPC

Mary Landon is a Licensed Professional Counselor with over 20 years of experience working with children, adolescents, and adults. Mary earned her M.A. and Ph.D. from Virginia Tech. She emphasizes a client-centered, strength-based approach to psychotherapy. Mary has extensive experience as a clinician in private practice and has interned and worked in, agency, residential and psychiatric settings.

Mary’s primary therapeutic techniques are person centered counseling, motivational interviewing, and cognitive behavioral therapy. She is also certified in EMDR (Eye Movement Desensitization Reprocessing) EMDR is a treatment method used to heal the symptoms of trauma, as well as other emotional conditions

Mary’s believes her role is to provide compassion and a non-judging environment, and to help provide clarity as the client begins to explore, understand and resolve personal issues that are impeding the ability to live life effectively. Her primary areas of treatment include:

  • Trauma
  • Mood disorders (Depression, Bipolar Disorder)
  • Anxiety
  • Eating Disorders
  • Work, Life Transitions
  • Attention Deficit Hyperactivity Disorder (all ages)

Shannon Oesch, LCSW

When you are experiencing trauma or stress, you might feel like your life is unraveling. It is my passion to help you get through that trauma/stress and come out the other side feeling empowered and energized. Tools I might use to do that are Person-Centered, Trauma Informed Approaches such as Cognitive Behavioral Therapy, Dialectical Behavioral Therapy or Motivational Interviewing to explore the details of what brings you to therapy.

I began my counseling career working at the Salvation Army Detox facility in Honolulu, Hawaii for a period of 5 years. I also worked in Dual Diagnosis Treatment Facilities and in Mental Health Case Management. I opened my Private Practice in 2012, and for the last 5 years has been helping my patients work on a variety of issues, specializing in trauma, domestic violence, depression and anxiety. I have been a trainer for other therapists for several years and has also served as an expert witness in court cases. My primary areas of treatment include :

  • Domestic Violence
  • PTSD/Trauma
  • Depression
  • Substance Use
  • Anxiety
  • Women’s issues
  • LGBT related issues
  • Schizophrenia,
  • Bipolar Disorder
  • Stress Management

My formal education was at the University of Missouri for my B.S.W. and Hawaii Pacific University for my Master’s of Social Work. I am clinically licensed in the State of Virginia.

For self-care, I enjoy going to the gym, dog park and spending time with family, friends and neighbors.


Lisa Cornelius

Lisa Cornelius, LCSW

My core belief: Healing and balance are not only possible, but are the result of counseling that respects every unique human experience while embarking on an introspective journey to uncover the unlimited potential and strengths of each person. While identifying together patterns of behavior that hinder balance, a new liberating take on life and contentment is achieved. As a Licensed Clinical Social Worker, I have ten years of experience in a myriad of clinical settings, with specific expertise working with vulnerable and at risk youth carrying multiple disabilities, mental health concerns and history of trauma, abuse and neglect. This work experience has enabled me to develop a specialization in understanding crisis management, effective behavioral modification techniques, as well as the importance of providing support to youth and families in therapeutic, educational and community settings. I am also an experienced diagnostic assessment writer and clinician in diagnosis, treatment and support of youth and adults with mental health concerns. Though part of my career focused on children and youth I also have worked with aging adults living with moderate to late stages of dementia, and adults in recovery with co-occurring diagnoses of addiction and mental health concerns.

I am passionate about providing a trusting therapeutic environment. I have been privileged to work with individuals from numerous ethnic, cultural, and religious backgrounds, addressing depression, anxiety, mood disorders, history of trauma and issues of self-esteem and social concerns. As a result, my cultural competency and open-minded approach are central to my work as a therapist. My substantial experience working with the LGBTQ community, particularly with youth in the transitional process of sexuality, coming out and gender identity, has allowed me to develop a deep understanding of the interconnection of culture, religion and sexuality with environmental factors which informs one’s internal dialogue and experience in the world. I have produced and conducted trainings that address the importance of protection from bullying and the emotional impact of gender and sexual self-identity. As a therapist, my ultimate goal is to consistently provide a non-judgmental, open, and supportive therapeutic space in which each client can feel comfortable, safe and empowered as we embark on a journey together to facilitate a shift toward healing, growth and overall inner peace.


Ryan Culkin

Ryan Culkin, MA

Ryan is the current Regional Clinic Director who oversees the daily operations and staffing of all Company Clinics in Virginia. He brings nearly a decade of clinical experience to Thriveworks. As a small business owner and a clinician, Ryan has many skills that make his role of growing the Virginia clinics, as well as all Thriveworks locations, imperative. While he is new to this role, his drive and passion for top-quality client services show through all of his efforts. In addition to his administrative role with Thriveworks, he is currently in the process of obtaining his LPC licensure in Virginia. Ryan is currently not accepting new clients, but possesses a vast amount of experience working with children and adolescents that are experiencing a variety of emotional and behavioral issues. Ryan received his Masters in Professional Counseling from Liberty University, and currently resides in Lynchburg, Va with his wife Rylie.


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Thriveworks Counseling

People Love Our Providers!

Overall Rating: 5★★★★★ based on 9
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Thriveworks Counseling Manassas

Shannon Oesch

★★★★★
Shannon Oesch is an excellent therapist and friend. I met Shannon years ago in Hawaii where I worked at a dom...Read more

estic violence shelter. Shannon came and facilitated a weekly support group and made a huge impact on many lives. Shannon is easy to talk to and a great listener!

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Thriveworks Counseling Manassas

Shannon Oesch LCSW

★★★★★
Shannon was very supportive as a Clinical Supervisor and extremely knowledgeable and experienced in her field....Read more

She has helped me develop my clinical skills and competencies throughout my Social Work career.

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Thriveworks Counseling Manassas

It was an excellent experience.

★★★★★
It was an excellent experience. I have been suffering from high anxiety and was skeptical about talking with s...Read more

omeone who didn’t know me. After my first session I could finally see light at the end of the tunnel. I cannot wait for my next appointments so that I can learn how to take my life back.

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Thriveworks Counseling

Schedule your first appointment with a Thriveworks Counselor or Life Coach!

  • 10755 Ambassador Dr Suite 201
    Manassas , VA 20109

  • Mon-Fri:8AM-9PM
    Sat-Sun:8AM-5PM