What do you mean by 'sim'?
Allowing for FAA/JAR/Oz vernacular you might be referring to:
1. an approved ground training device/synthetic trainer class eg ATC-710, Frasca 141/242 class, some of the purpose designed PC trainers
2. a flight simulator eg level C or D eg the sort of thing that allows zero flight time or near-zero flight time type ratings
3. something else that doesn't count at all eg MS Flight sim., RANT etc
I don't include any of it in my CV. If a company wants to know then they'll ask is my belief. If asked then only devices that creditable towards the issue of a licence or rating get included, and as a separate item to my real I.F./flight time.