Burkus was the deputy consul of the Monean Maritime Sovereignty, an underwater society. The homeworld of the Moneans was an artificially-created water world, held in place by a containment field. His family had lived in the Waters for ten generations.
When visited by USS Voyager in 2375, the planet was in danger of losing containment. At first Burkus tried to warn Voyager to stay away, but accepted an invitation to tour Voyager. Once he became convinced that Voyager's intentions were honorable, he invited them to visit his homeworld.
After an investigation by Tom Paris, Burkus was informed that the Monean oxygen refineries were depleting the ocean. Burkus refused to believe there was any danger. B'Elanna Torres had an idea for a safer refinery, but Burkus refused Voyager's help, stating that the Sovereignty would make a decision in due course and take Voyager's findings under advisement. (VOY: "Thirty Days")