there is dwf importer in maya. just drag and drop the cad file. u'll get a lot of emplysets and other unwanted nodes, which u can delete. like in 3D Max, they don't come in layers, but instead in a lot of confusing groups that doesn't make sense. so better take care of the groupings too.
projects of my company
3D
https://www.youtube.com/watch?v=uPTmThoCrIY&feature=related - project - disney diwali (india based company)
https://www.youtube.com/watch?v=JSAfzqMBHqs&feature=related - project - 2 medhak (Public Service Ad)
https://www.youtube.com/watch?v=lMLR2L-swZo - project - ace bank commercial
https://www.youtube.com/watch?v=ZogNsf8k-xU - project - company Profile
2D
https://www.youtube.com/watch?v=82xV3bII9bU - project - (a fren named jimmy)