Seven workers at the Driver and Vehicle Licensing Agency in Swansea have been suspended after putting "inappropriate" comments on the social networking site Facebook.
The staff are being investigated by company bosses and face disciplinary action after being caught writing personal comments on the website.
A DVLA spokesman said: "The staff remain suspended while investigations are ongoing."
5,000 people are employed at the DVLA's main office in south Wales.
The staff are thought to have posted the remarks outside work and were later reported to their bosses.
The DVLA is currently in the process of closing all 39 of its regional offices in an attempt to cut costs and drive more customers to use its online services.