"Specialist knowledge" refers to having a deep understanding and expertise in a specific field or subject. It means having specialized information and skills that go beyond general knowledge. Full definition
A significant volume of our work involves partnership disputes which require the application of specialist knowledge of partnership disputes law and its impact on the rights and obligations of partners and members. (burges-salmon.com)
Of course government could still do more, including getting more teachers with specialist knowledge of Stem [science, technology, engineering, and mathematics] subjects and top class degrees into schools. (bbc.co.uk)
But our team of experienced road traffic offence lawyers have developed specialist knowledge and skill to effectively advise and represent clients in relation to all driving matters. (stokoepartnership.com)