Welder. Ecosse welding was established in 1979. Ecosse welding is a fully certified operation through the Canadian Welding Bureau and ABSA with 20 full time welders on staff. Ecosse welding specializes in oilfield package fabrication and structural steel with shop and field services. Ecosse welding operates the Calgary welder test centre which performs a CWB welder performance qualification testing session every Wednesday year round.