"Specialised" means to be highly skilled or focused in a specific area or subject. It describes someone or something that has great expertise or knowledge in a particular field. Full definition
If you are looking for a private lawyer who specialises in family law matters, the law society in your state or territory may be able to help. (familycourt.gov.au)
If you want to do this, talk to a solicitor who specialises in international divorce or dissolution. (moneyadviceservice.org.uk)
I have a client, a major successful recruitment company specialising in financial markets. (royripper.com)