Office of Emergency Management (OEM)

OASIS Public Safety Radio System


The Radio Services Division of OEM administers and maintains an 800 MHz analog trunked radio system used by Milwaukee County departments and the public safety agencies of 17 Milwaukee County municipalities. The Radio Services Division is also the lead agency for a multi-year capital project to build and implement a new 800 MHz P25 digital radio system.

The new digital radio system is called OASIS, which stands for Organization of Affiliated Secure Interoperable RF Subsystems. OASIS is a regional radio system providing mission critical and interoperable communications for public safety agencies and first responders in Milwaukee and Waukesha counties.

The Milwaukee County subsystem of OASIS is governed by a Board of Directors comprised of three Milwaukee County Department Heads and four municipal representatives appointed by the Milwaukee County Executive. The Governance Board is supported by two standing committees, a Technical Committee and a Operations Committee.

OASIS 2017 Annual Report

OASIS 2016 Annual Report

LE Training

Fire Training


Office of Emergency Management - Radio Services
633 W. Wisconsin Ave., Suite 700
Milwaukee, WI 53203


Erik Viel | Director, Radio Services Division

Office of Emergency Management
821 West State Street, Rm 305
Milwaukee, WI 53233


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