A strike by SIPTU members at GMC Civil and Mechanical Engineering will be suspended next week to allow for talks at the Labour Court.
Pickets will be lifted on Monday evening and a return to work is scheduled for Tuesday morning ahead of a Labour Court hearing on Monday 2 October.
SIPTU had accused GMC of failing to implement agreed recommendations on pay and conditions.
The company has previously said it has engaged constructively with employees and their representatives and has not frustrated any resolution of the pay dispute.
GMC is contracted by Gas Networks Ireland for the installation, maintenance and provision of emergency response on the gas network.
SIPTU said that in a show of solidarity from fellow union members, the Group of Unions (GOU) in Gas Networks Ireland has pledged its total support to SIPTU members in GMC.
"The Gas Networks Ireland GOU will now commence a period of consultation with members for supportive industrial action," SIPTU said in a statement.
"It has also agreed to write to the company's board, the Minister for Energy and the regulator expressing its anger at the way that fellow union members have been treated in GMC," the union said.
SIPTU Divisional Organiser, Adrian Kane, said they will also be meeting with the Group of Unions in Irish Water seeking similar commitments to those pledged by the Gas Networks Ireland Group of Unions.
