Careers advice needed regarding salary

Matt,

The key part of your question is the final sentence. It sounds to me like you think you're undervalued, rather than you want more money per se (yes, we'd all like more money, but I think you can see what I'm saying here). The two things are quite different and would require different approaches. You also have to take into account job satisfaction and development opportunities. You said that you "relatively enjoy" what you do - if this is the case, the positive effect of more money is likely to be only temporary, and you'll be back in the same boat sooner or later.

Assuming that you want to stay where you are, you need to gather some evidence of being underpaid compared with other people in a similar role inside and outside the organisation. You may well come up against corporate pay policy here, and that's a tough one to get round. You could also discuss the possibility of having your post upgraded, perhaps by showing willingness to take on some additional responsibility, or by actively seeking to get involved in high-profile projects.

When it comes down to it, though, I would exercise caution before jumping ship. Over the years I've seen an awful lot of people who thought the grass was greener somewhere else, only to discover that the place they left was actually better place to work than where they ended up..