I have been using them since they were called iCIMS (now renamed as atlas).
They are very knowledgeable about cloud management services that include AWS/Azure along with hybrid solutions such as VMware vSphere or Microsoft HyperV VMs running within an Azure VM Scale set; however this only works if you understand how it all fits together! Their staff can be extremely helpful but also quite stubborn when trying too make changes which isn't always necessary - just go slow and keep asking questions until your satisfied everything makes sense from both sides / perspectives! Managed environments including virtual machines, containers etc.