In an end of day Commons debate, the last of this session, the Cumbernauld MP, who is his party's pensions spokesman, will argue that Scots get a better deal as part of the UK with a higher proportion of HMRC jobs based in Scotland than in the rest of the UK.
He will say there are 9,090 HMRC jobs in Scotland compared to a UK-wide figure of 69,985. This is 13 per cent of the jobs for just 8.4 per cent of the population; this, he will say, produces a "3,211 jobs dividend for Scotland being part of the UK".
Ahead of his debate, Mr McClymont said: "The figures are clear. Scotland gets a good deal when it comes to UK public sector jobs.
"When you are administering a tax system for five million people rather than 63m, you will need far fewer staff. I know what an important part of the local economy the tax office can be.
"As part of the UK we can have the best of both worlds; a strong Scottish Parliament with the guarantee of more powers without losing the strength, stability and security of being part of the UK."