Shift Worker Intervention for Sleep Health

Inclusion Criteria: * Provision of signed and dated informed consent form * Any gender; Ages 18-65 * Currently employed as a nurse or nursing staff member (e.g., CNA) in the United States * Currently have shift work schedules (i.e., stable night shift or rotating shifts that include nights, \>=2 nights/week) and have worked shift work \>=2 nights/week for at least 3 months * Expect to have a shift work schedule \>=2 nights/week over the next 6 months * endorse poor sleep, as evidenced by T-score \>=60 on the PROMIS Sleep Disturbance OR Sleep-Related Impairment measure * Have daily access to the internet on a smartphone, table, or computer; and * Can read and write in English. Exclusion Criteria: * Conditions which make study treatment likely to be ineffective. For example, current chronic use of medications that interfere with sleep, alcohol or substance use disorder, or thought disorder (as determined by DIAMOND psychiatric interview), unstable sleep or medical conditions that necessitate additional medical care not provided by study treatments (e.g., known untreated sleep apnea). * Presence of safety risk or condition in which study participation may result in increased risk to safety (e.g., elevated risk for suicide, self-reported uncontrolled seizure disorder, history of manic or hypomanic episode, current pregnancy), * Currently receiving non-pharmacological treatment for insomnia (e.g., cognitive behavioral therapy for insomnia) and/or current unstable hypnotic/alerting medication use OR * Currently participating in other research studies with substantial overlap in terms of methods/procedures (e.g., PI's ongoing study "Piloting an Adaptation of Cognitive Behavioral Therapy for Insomnia for Shift Workers (CBTI-Shift)"