¶1OPINION OF THE COURT
¶2This appeal follows the decision of the County Manager of Dade County, upholding the Appellant’s 20-day suspension from county services.
¶3On September 14, 1987 Appellant Arthur Stack, received notification from the Director of the Metro-Dade Police Department of his 20-day suspension. An Appeal followed and on February 11, 1988 Appellant *27came before the hearing examiner. On June 16, 1988 the County Manager upheld Arthur Stack’s suspension finding the Appellant in violation of Metro-Dade Police Department Rules 2.700.20, divulging confidential internal information and 2.200.67, interference with an internal investigation.
¶4Metro-Dade Police Department, Rule 2.700.20 provides that no employee shall communicate internal departmental information with someone who is not a member of the organization, without authorization.
¶5The Appellant contends that the evidence which points towards his divulgence of confidential information about wiretaps is hearsay. However, the evidence is both competent and substantial. A witness may testify regarding all matters in which he has personal knowledge, F.S. § 90.604.
¶6The recorded conversation which implicated Arthur Stack was heard by Sgt. Hasenback, who recognized the voices on the tape and Sgt. Gilliland, who transcribed the remarks regarding “Art” and the information about wiretaps in San Pedro’s home. Both sergeants are competent witnesses, who have testified as to Appellant’s violation of Rule 2.700.20.
¶7Metro-Dade Police Department Rule 2.200 states “Except as authorized or required, an employee shall not contact persons involved in an internal investigation, nor disclose or discuss with anyone, except the designated Departmental authority, the existence or facts of a complaint.
¶8After Bemkrant, a police informant, had been asked to give a statement to Internal Review, Arthur Stack conferred with Bemkrant regarding his testimony. Rule 2.200.67 prohibits an employee from contacting any person involved in an internal investigation. Sgt. Stack, a 14 year veteran with the Department, is well aware of this rule and yet conversed with Bemkrant, an Internal Review witness.
¶9The County Manager’s decision to uphold Arthur Stack’s 20-day suspension is therefore affirmed.