Arthur was called to the Antigua Bar in 1991 and since then has been engaged in private legal practice in the areas of corporate and commercial law, civil litigation, land law, intellectual property, banking, insurance, industrial law and probate for the most part.
Arthur possesses a Master of Law in International Taxation read at the Regent University, Virginia, USA, which certificate he received in 2003.
He is the current President of Antigua Bar Association, having previously worked as Vice President and Secretary of the Association. He is a Notary Public of Antigua and Barbuda. He also serves as a Commissioner of the Eastern Caribbean Securities Regulatory Commission and is an active member of the International Masters of Gaming Law.