ATO signals managed services shake up in new market approach ATO signals managed services shake up in new market approach Seeks centralised computing, end user computing and enterprise service management centre services. The Australian Taxation Office (ATO) will soon be approaching the market for a significant range of IT managed services as part of its multi-year IT Strategic Sourcing Program. These include centralised computing, end user computing and enterprise service management centre, plus any ancillary services. The IT Strategic Sourcing Program includes market sounding and analysis over 2021, a progressive approach to market in 2022 and then contract execution, transition and service transformation in 2023.