Gross misconduct was proven for SC Carlos Correia, of the West Area Policing Command, which serves Ealing, Hounslow and Hillingdon, at a disciplinary hearing last week.
The hearing concludes an investigation into allegations of two counts of sexual assault on a female colleague, which reportedly occurred outside of work.
Criminal proceedings were launched in January 2022 by the Met Police, which concluded in February 2023.
Following consultation with the Crown Prosecution Service, no further action was taken.
An investigation by the Met’s Directorate of Professional Standards then took place which determined SC Correia should face a gross misconduct hearing.
A hearing last week found that he had breached police standards of professional behaviour for discreditable conduct proven at gross misconduct.
He was dismissed without notice.