You can prevent root squashing to occur for this mount point and as root, can make the changes.
Something like below
On the NetApp
732sql@simtap1> exportfs -p rw,anon=0 /vol/RHEV
732sql@simtap1> exportfs
/vol/RHEV -sec=sys,rw,anon=0
On the client
sh-3.2# mount 172.16.56.153:/vol/RHEV /RHEV/
sh-3.2# df -h
Filesystem Size Used Avail Capacity Mounted on
172.16.56.153:/vol/RHEV 2.0Gi 113Mi 1.9Gi 6% /RHEV
sh-3.2# cd /RHEV/
sh-3.2# mkdir Images
sh-3.2# chown -R 36:36 Images
sh-3.2# chmod u+s Images
sh-3.2# chmod g+s Images
sh-3.2# ls -ltr
total 208835
drwxrwxrwx 5 root wheel 4096 Mar 13 22:51 .snapshot
drwsr-sr-x 2 36 36 4096 Apr 25 08:38 Images