A widely travelled diplomat and a determined prosecutor of Arianism, the presence of Servatius is recorded at several synods and church councils. In 343, "Sarbatios" - Greek texts rendering "v" as "b" - was present at the Council of Sardica (modern Sofia). In the debates, Servatius represented the Trinitarian view, which clashed with the Arian view of most Eastern bishops. When Athanasius, leader of the anti-Arian party, was in exile in Trier, he may have met with Servatius in Trier or Tongeren, because both men campaigned against Arian bishops and priests in the region. In 346, at the Council of Cologne, Servatius testified against the bishop of Cologne, saying that "he denied the divinity of Jesus Christ, this even happened in the presence of Athanasius, bishop of Alexandria", adding to this "our churches are adjacent".