The families of two officers brutally murdered by Australia's most wanted man will attend a memorial service honouring police who went to work but never came home.

Monday marks one of the most significant days in the policing calendar, National Police Remembrance Day, which gives police a chance to pay tribute to those killed on the job.

Victorian police officers Neal Thompson and Vadim de Waart-Hottart were gunned down in the small town of Porepunkah on August 26 while they were attempting to carry out a search warrant.

Leading Senior Constable Thompson, a Victoria Police veteran of 38 years, was due to retire from the force a week after he died.

Hundreds of their colleagues are still involved in the search for their alleged killer, Dezi Freeman, who is accused of firing the weapon.

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