We are expert in ontologies, OWL, Protege, Jena, Reasoners (Pellet, Fact++ etc) and web semantic stuff. I have done two projects using Jena to make reasoning and inferences. I have done my thesis in the same domain. I have two international publications in semantic technology.
ON freelance, I have been done the similar projects. For example, the following one
https://www.freelancer.com/projects/Java-database-programming/Protege-OWL-Project-Database-Expert/