** Shares of Australia's Ventia Services Group VNT.AX rise as much as 3.78% to A$5.22, extending gains from the previous session
** Infrastructure services provider says the City of Sydney has extended its facility management agreement with the group
** Two-year extension valued at A$100 million ($66.57 million)
** Stock gained most since April 10 in the previous session after co was awarded an A$2.7 billion contract by the Australian Department of Defence
** Stock last up 3.2%, bringing YTD gains to 44.2%
($1 = 1.5022 Australian dollars)
(Reporting by Shruti Agarwal in Bengaluru)
((Shruti.Agarwal@thomsonreuters.com))