The phrase "presiding arbitrator" refers to the person who leads or oversees an arbitration process. They make important decisions, manage the proceedings, and ensure that all parties are treated fairly. Full definition
Sole presiding arbitrator in a maritime dispute with a Nicaraguan claimant and Bahamian Respondent, applying general United States maritime law, and with the seat of arbitration in Nicaragua. (jamsadr.com)
Sole presiding arbitrator in a commercial dispute. (jamsadr.com)
One arbitrator is appointed by each party, and the third presiding arbitrator is appointed by agreement between the disputing parties. (tradeready.ca)