Need to filtered contacts in position field

We have 35000 contacts in our segment which contain mix of job titles. we would like to filter all contacts which contain marketing in their job title to filter out. how can we do this? I can not see any option in filter. please suggest.

We have 35000 contacts in our segment which contain mix of job titles. we would like to filter all contacts which contain marketing in their job title to filter out. how can we do this? I can not see any option in filter. please suggest.

You can create a segment to put all the people that have marketing in job position
or you can search in the contact windows using position:%marketing%