Managing contacts from 2 gmail account

[Android Question]

T-mobile samsung galaxy note 3. Have 2 gmail accounts (work and Personal) with contacts i would like to keep separate. Work account has 100 contacts whom i need to send a text message. When work account contacts are selected and showing in Contacts, and you go to text message its still seeing the personal contacts. How can you select work contacts from when texting.

Thx