A union leader says he has fears over the long-term future of a car plant in Swansea where 700 people are employed.
Around 700 are currently employed at the plant in Swansea
T&G regional secretary Andy Richards was part of a delegation with Welsh Secretary Peter Hain who met senior managers at the Visteon plant.
Mr Richards said the company was unable to say what work it could attract after existing contracts ended in 2008.
Visteon said it was facing a "difficult business situation" at the plant.
About 100 workers at Swansea will transfer to Ford's engine plant at Bridgend by the end of March.
The Visteon corporation was set up by Ford as a stand-alone supplier of components.
Mr Richards said: "Our concerns over the future of the plant remain, albeit that further talks are planned.
"Both Visteon and Ford have an obligation to this plant where the workers have contributed so much and we are strongly resolved to see that these obligations are met.
"We made it clear that we would accept no fait accompli announcement and would oppose plant closure by any means."
He said the company and unions had agreed to resume negotiations over cost reduction measures at the plant that had been adjourned since October last year.
A spokesman for Visteon said the corporation had recently undergone significant restructuring in North America and would continue to review its operations in other parts of the world, including the UK.
"As we take these actions to drive cost competitiveness locally, there is a need to address the challenging financial situation faced by Visteon UK Ltd," it said.
"We are progressing a number of actions that include focusing the product portfolio, selling under-utilised assets and working with our employees and unions to improve the competitiveness of the UK business."