THE "office" isn't exactly warm and the job needs a strong back, but with a glinting River Loughor and stunning views beyond, these engineers are taking the rough with the smooth.
And today was due to herald the completion of the Loughor viaduct scheme, although some track work still re- mains around Gowerton.
Network Rail's £48million project was to replace the viaduct and redouble a 5.25-mile stretch of line running through Gowerton.
Viv Davies, of Gowerton, said it was great to see a large, high-calibre engineering project nearby.
"During the really awful winter weather they had these cranes on floats," she said.
"Last week they had four cranes with all these men in orange jackets working their socks off. It's an amazing sight to see construction of that type."
She added: "The tracks are now in position."
Mrs Davies said trains were a good option for her two sons when they came back from a Saturday night out in Swansea.
"A ticket is only £2.50," she said.
Train services have not run between Swansea and Llanelli since March 24 for this phase of the project.
A Network Rail spokesman said: "The current forecast for completion of the whole project remains 3am on April 8.
"It looks like we are still on schedule to meet that target."
The Welsh Government contributed £25 million to the scheme.
Speaking last month, Mark Langman, Network Rail route managing director Wales, said: "The new viaduct at Loughor and the redoubling, as well as the new station platform and footbridge at Gowerton, are part of a package of station and infrastructure improvements as we strive to make rail travel more comfortable and attractive to the public."
Transport Minister Carl Sargeant added: "These improvements are excellent news for the population of West Wales as they will provide the capacity for a more frequent and reliable service."