My ex-husband and I divorced in 1985 in California. He was ordered to pay child support to our 3 year old daughter. I never received any child support payments from him. My daughter is now 27 years old, married with a family. Also, my ex-husband is an attorney, here in So. California.
Please advise if I am able to collection past support.
Thank you.

Open a case with your county Department of Child Support Services (DCSS). They'll collect this for you for free.

DCSS will send your ex a bill with 10% interest added. I think he'll
Be shocked to see the amount owed if he never paid anything on the support order for its 15 year duration (round about).

Was the court ever notified that he was in arrears ?

Yes, how many times did you take him back to court, was he turned over to child support enforcement