The hearing, held at Sussex Police headquarters, heard that several colleagues had seen the behaviour and felt uncomfortable.
"PCSO B" testified with details of the locker room incident.
"The door wasn't knocked, it was forcefully opened," she told the hearing.
"I heard PC Green say 'are you decent'. PCSO A jumped, it made me jump.
"I looked towards the door and saw it closing."
Green has denied most charges but admits pushing the locker room door to "creep it open".
In a previous statement PC Green said: "I was having a bit of a laugh. It was never my intention to make her feel bad.
"I didn't want to do anything malicious or make her feel uncomfortable.
"I misjudged the friendship."
SEXUAL HARM - DO YOU NEED HELP?
If it's an emergency and you feel that you or someone else is at risk, call 111.
If you've ever experienced sexual assault or abuse and need to talk to someone contact Safe to Talk confidentially:
• Call 0800 044 334
• Text 4334
• Email support@safetotalk.nz
• For more info or to web chat visit www.safetotalk.nz
Alternatively contact your local police station - click here for a list.