Meet the Staff

Director of Health and Counseling Services

Jennifer Howes, Ph.D.

Assistant Director of Counseling Services

Lee H. Coleman, Ph.D., ABPP

Staff Clinicians

Charisma Bartlett, Ph.D.
Jarrett Ellington, Psy.D.
Ashwini Lal, Psy.D.
Denise Lin, LCSW
Karyn Maczka, LMFT

Psychiatrist

Mariel Tourani, M.D.

Administrative Staff

Maria Lopez

Kim Quintana



Jennifer Howes, Ph.D.

Director of Student Health and Counseling Services

pronouns: she/her/hers

I completed my undergraduate work at UCLA and received my Ph.D. in Clinical Psychology from the California School of Professional Psychology at Alliant International University. Prior to arriving at Caltech in 2011, I worked with a diverse group of students at the Claremont Colleges and maintained a small private practice. While I now focus on administrative aspects of Health and Counseling Services, I enjoy supporting students through programming and outreach events related to mental health, emotional wellbeing, identity development, physical fitness, and the Caltech Cares initiative. 

Lee H. Coleman, Ph.D., ABPP

Assistant Director of Counseling Services; Coordinator of Groups and Outreach

Pronouns:  He/him/his
Education: Ph.D. in Clinical Psychology, Miami University, 1999
Professional Affiliations: Diplomate, American Board of Professional Psychology; International Mindfulness Teachers Association
Professional Interests:  Depression and anxiety; preventing depressive relapse; suicide prevention; emotion regulation; mindful awareness skills
Liaisonships/Committees:  Liaison to Blacker and Ricketts Houses
Hobbies/Self-Care: Meditation, playing bass guitar, cooking, and reading
Wellness Tip:  Meditation isn’t necessarily something you have to set aside separate time for. It’s an attitude of welcoming awareness that you can bring to whatever you happen to be doing anyway.

This is my 15th year at Caltech. It’s an incredible privilege to work with such talented, insightful, and delightful students.  There’s so much that Wellness Services can offer you - please come talk with us, and let’s find out how we can work together.

Charisma Bartlett, Ph.D.

Staff Psychologist, Asian/Asian-American Focus

After traveling through 39 countries around the world as a student, tourist, and self-proclaimed international food taster, I completed my doctorate in Clinical Psychology in 2010 and joined Counseling Services in 2011. My interest areas include cultural identity, spirituality and existential issues, and advocacy for the mental health needs of Asian and Asian American students. As a liaison to International Student Programs (ISP), I provide adjustment and ongoing support to  international students. Through my diverse experiences at local universities and hospital settings, I am also able to work with a student’s relationship with food and body image. 

I believe it’s never too late to make mindset shifts that can make a significant impact on one’s present circumstances and future trajectory. My therapeutic style is warm, relational, and focuses on your strengths and goals, in addition to managing areas of impasse. I assess how past relationships and experiences may be connected to arrested development in your current context. Through collaborative exploration, I can help you discover deeper connections in your relationships and move toward a greater sense of purpose and work-life balance.


Jarrett Ellington, Psy.D.

Staff Psychologist, Alcohol and Other Drugs Clinical & Outreach Coordinator

Education: PsyD in Clinical Psychology, Fuller Seminary Graduate School of Psychology, 2010
Professional Interests: Substance abuse; Anxiety and depression; Relationship concerns; Faith and spirituality; Working with student athletes.
Hobbies/Self-care: Spending time with family, running, drinking artisan coffee, spending time in nature, & watching Lakers basketball.
Wellness Tip: Practicing gratitude, learning to be content, & loving others is healthy for the soul.              

 I strive to “meet people where they are at” and provide a safe, non-judgmental environment in which students can explore their concerns. I find cognitive-behavioral, motivational interviewing, and mindfulness strategies to be quite useful in my work with students and utilize other approaches when needed. I believe that everyone has unique strengths. Counseling is a wonderful opportunity to collaborate in identifying those strengths and leveraging them for positive change.

Ashwini Lal, Psy.D.

Staff Psychologist and Residence Life Liaison

Education: Psy.D. Illinois School of Professional Psychology
B.A., University of California, Irvine
Professional Interests:
Grief/Loss, Cultural and sexual Identity Development, Mood and Anxiety Disorders, Suicide assessment and treatment, Life events/transitions
Hobbies/Self-Care: Gym, kayaking, spending time with friends, exploring different restaurants, cooking, spending time with family, visiting Hawaii to reconnect with nature
Wellness Tip: Always make time for yourself.

Dr. Lal has trained and worked in different hospitals and university health settings. Throughout his career, he has contributed to the research literature, has written online articles, and has been involved in radio shows addressing mental health issues.

He uses an integrative approach to psychotherapy focused on increasing awareness into factors contributing to struggles and works collaboratively to increase one’s ability to manage symptoms. Symptom management provides immediate relief while allowing for the therapist and patient to work collaboratively to gain an in-depth understanding of the patient’s struggles. This increased awareness leads to long term improvement and increased life satisfaction.

Denise Lin, LCSW

Staff Clinician and Crisis Intervention Coordinator

Pronouns: She/Her/Hers
Education: Master in Social Work, California State University, Los Angeles
Psychology, University of California, Los Angeles
Professional Affiliations:
National Association of Social Workers
Professional Interests: Acculturation; suicide prevention; multicultural identities; issues related to assault and trauma; interpersonal relationships; depression; issues related to self-esteem
Liaisonships/Committees: Liaison to Avery House
Hobbies/Self-Care: Traveling, cooking, reading, going to the beach, and being in nature
Wellness Tip: The small things make a difference – 3 healthy meals a day, 8 hours of sleep, playing with your cat or dog, reading for fun, sketching, playing an instrument at night, meditating, exercising, calling a friend, or going for a hike or beach day. We need to take care of ourselves in order to take care of others and reach our goals. We all have difficult moments, days and times; reach out to a friend or other supportive individual. Be that supportive individual for someone else.

Denise is a licensed clinical social worker and has been a staff clinician at Caltech Counseling Services since January 2017. She is able to offer counseling in Mandarin and has worked in the field of Asian American mental health for 7 years prior to her experience with college counseling. Drawing from several therapeutic approaches, including psychodynamic and systems theory, Denise strives to use an integrative approach that taps into students’ strengths and resilience to address current difficulties.

Karyn Maczka, LMFT

Staff Clinician

Pronouns: She/her/hers

Education: Licensed Marriage and Family Therapist, LMFT 102501
M.A. Pepperdine University, Graduate School of Education and Psychology
B.A. University of California, Los Angeles
Professional Affiliations: California Association of Marriage and Family Therapists
Professional Interests:
individual, couples, and group psychotherapy; relationship dissatisfaction, family distress, anxiety, trauma-related concerns, eating disorders and body image distress, cultural identity issues, and acculturation.
Liaisonships/Committees:
Eating Disorder Treatment Committee
Hobbies/Self-Care:
Dancing, climbing, biking, tennis, languages, world music, traveling, arts & crafts.
Wellness Tips:
Take a few moments to mindfully breathe throughout the day. Do not compare your interior to anyone else’s exterior. Engage in healthy movement and enjoy what your body is able to do. Make room/time for fun!

As a multicultural clinician, Karyn enjoys working with individuals, couples, and groups from diverse backgrounds while intentionally maintaining a culturally sensitive approach. She integrates humanistic, psychodynamic, and cognitive behavioral interventions, and highly values building a relationship based on trust, openness, and collaboration with each student. Karyn considers therapy to be a powerful vehicle for identifying and changing maladaptive thoughts, feelings, and behaviors, which may be adversely impacting one’s quality of life. She is excited to be part of the Caltech Community and honored to help others attain a greater state of wellness.

Mariel Tourani, M.D.

Consulting Psychiatrist

Maria Lopez

Office Manager for the Student Health and Counseling Services

I am the Office Manager for Student Health & Counseling Services and provide administrative support to the centers’ professional staff. My responsibilities are to do the many tasks required by the Director and the staff to keep the office running smoothly.  I have a background in the medical field doing Administrative/Secretarial work and as a Surgical Scrub Tech.  When I am not at work I enjoy spending time with my family.

Kim Quintana

Administrative Coordinator for the Student Counseling Services

I have been working with Student Counseling Services since 2012. My responsibility is to take care of front office duties as well as other administrative tasks. You will most likely see me or talk to me when scheduling or coming in for your first appointment. You may also contact me if you need to schedule other appointments, such as follow up appointments with your therapist or with the psychiatrist.  I look forward to hearing from you!