Dr Evan Chachos

Dr Evan Chachos is a registered psychologist undertaking the clinical registrar program. He obtained his undergraduate and master’s (clinical and health psychology) degrees from the University of Manchester and his doctoral degree in clinical psychology at Monash University.

Evan has a strong interest in understanding how trauma affects thought process in day to day life, and how this extends to influencing world views and views about the future.

His training in the areas of sleep therapy and trauma therapy give Evan a unique perspective on managing the difficulties that traumatised clients experience. This enables him to help people that have experienced trauma and post-traumatic stress, anxiety and general stress, sleep difficulties, adjustment to life-limiting conditions, mood concerns (e.g., depression, bipolar spectrum conditions), grief and bereavement, relationship concerns, and others.

Evan has extensive academic, research, and clinical international experience (Greece, UK, Australia). He is committed to ongoing professional development and evidence-based practice to provide effective, safe, non-stigmatising, and compassionate care tailored to each person’s psychological needs.

His therapeutic work is built on a person-centred collaborative foundation focused on understanding each person’s strengths, needs, and current challenges in order to progress towards a more fulfilling day-to-day life.

To achieve these goals he incorporates therapeutic tools from a range of evidence-based therapies, such as cognitive behavioural therapy (CBT), acceptance and commitment therapy (ACT), and dialectical behavioural therapy (DBT). For individuals with experience of trauma and particularly posttraumatic stress, Evan utilises cognitive processing therapy (CPT).

Evan remains active in research and has been involved in several works. Evan is also fluent in Greek.

Psychologist Evan Chachos

Professional associations

  • Registered Psychologist with the Australian Health Practitioners Regulation Authority (AHPRA)
  • Australian Psychological Society and the Disaster Response Network initiative.


Peer Reviewed Journal Articles

Chachos, E., Shen, L., Yap, Y., Maskevich, S., Stone, E. J., Wiley, J. F., & Bei, B., (2023). Vulnerability to sleep-related affective
disturbances? A closer look at Dysfunctional Beliefs and Attitudes about Sleep as a moderator of daily sleep-affect
associations in young people. Sleep Health, Accepted for Publication (July 2023).

Stone, J. E., Wiley, J., Chachos, E., Hand, A. J., Lu, S., Raniti, M., … & CLASS Study Team. (2022). Protocol: The CLASS Study
(Circadian Light in Adolescence, Sleep and School): protocol for a prospective, longitudinal cohort to assess sleep,
light, circadian timing and academic performance in adolescence. BMJ Open, 12(5).

Hewitt, R. M., Bundy, C., Newi, A. L., Chachos, E., Sommer, R., Kleyn, C. E., … & Blome, C. (2022). How do dermatologists’
personal models inform a patient‐centred approach to management: a qualitative study using the example of
prescribing a new treatment (Apremilast). The British Journal of Dermatology, 187(1), 82-88.

Pattinson, R., Hewitt, R. M., Trialonis-Suthakharan, N., Chachos, E., Courtier, N., Austin, J., … & Bundy, C. (2022).
Development of a conceptual framework for a Patient-Reported Impact of Dermatological Diseases (PRIDD)
measure: a qualitative concept elicitation study. Acta Dermato-Venereologica, 102, adv00823-adv00823.

Stone, J. E., Phillips, A. J., Chachos, E., Hand, A. J., Lu, S., Carskadon, M. A., … & CLASS Study Team. (2021). In‐person vs
home schooling during the COVID‐19 pandemic: Differences in sleep, circadian timing, and mood in early
adolescence. Journal of Pineal Research, 71(2), e12757.

Conference Presentations

Evangelos Chachos, Lin Shen, Yang Yap, Svetlana Maskevich, Julia E. Stone, Joshua F. Wiley, Bei Bei. The Role of
Dysfunctional Beliefs and Attitudes about Sleep In the Association between Daily Sleep and Affect in Adolescents
and Young Adults. Oral Presentation, Australasian Sleep Association, SleepDownUnder 2021.

Evangelos Chachos, Sinh Lu, Anthony J. Hand, Mary A. Carskadon, Elizabeth B. Klerman, Steven W. Lockley, Joshua F. Wiley,
Andrew J. K. Phillips, Shantha M. W. Rajaratnam, Bei Bei, Julia E. Stone. The association between later circadian
timing and higher depressive symptoms in early adolescence is ameliorated by longer sleep duration. Oral
Presentation, Australasian Sleep Association, SleepDownUnder 2022.

Published Conference Abstracts

Chachos, E., Lu, S., Hand, A., Carskadon, M., Klerman, E., Lockley, S., Wiley, J., Phillips, A., Rajaratnam, S., Bei, B., & Stone, J.
(2022). O019 The Association Between Later Circadians Timing And Higher Depressive Symptoms In Early
Adolescence Is Ameliorated By Longer Sleep Duration. SLEEP Advances, 3(Supplement_1), A17-A17.

Lu, S., Phillips, A., Hand, A., Chachos, E., Carskadon, M., Lockley, S., … & Stone, J. (2022). O041 Pre-bedtime device use
disrupts sleep in early adolescents: differential effects depending on device type and media content. SLEEP
Advances, 3(Supplement_1), A17-A17.

Hand., A., Stone, E. J., Lu, S., Chachos, E., Carskadon, A. M., Lockley, W. S., Wiley, F. J., Bei, B., Klerman, B. E., Rajaratnam, M.
W. S., & Phillips, J. K. A. (2022). O044 The Association Of The Sleep Regularity Index With Subjective Cognitive
Function And Academic Skills In Adolescents. SLEEP Advances, 3(Supplement_1), A17-A17.

Chachos, E., Shen, L., Maskevich, S., Yap, Y., Stone, J., Wiley, J., & Bei, B. (2021). O010 The role of dysfunctional beliefs and
attitudes about sleep in the association between daily sleep and affect in adolescents and emerging adults. SLEEP
Advances, 2(Supplement_1), A5-A5.

Stone, J., Phillips, A., Wiley, J., Chachos, E., Hand, A., Lu, S., … & Rajaratnam, S. (2021). O030 Changes in sleep-wake
patterns, circadian timing, and mood in Australian teens during the COVID-19 pandemic. SLEEP Advances,
2(Supplement_1), A13-A14.