Callistus started legal practice in October 2004 and joined the firm in June 2006. He has since then been actively involved in Maritime, Shipping, Commercial and Corporate practice of the firm:- proffering legal advice to Clients particularly on the registration, charter & sale of vessels, arrest & release of vessels, general leases & mortgages, shipping related issues, and litigation emanating there from. As part of the requirement for continuing legal education, he has attended seminars and training courses in shipping and maritime practice.
He is a member of the Nigerian Bar Association (NBA), International Bar Association (IBA), and an Associate of the Chartered Institute of Arbitrators, UK.
Callistus is currently undertaking a post graduate LL.M Course in Maritime Law at Swansea University, UK