So you are being given preferred stock? That's the only stock that I can think of that would prevent dilution during later stages. I find it difficult to believe that a smart startup company that would give out preferred stock to employees. I also can't imagine VCs/angels who would invest in a company that had just given preferred stock to a "Legal and compliance director" (no offense but that title isn't necessarily thought of in terms of bringing revenue in as highly as a developer or salesperson).
A 2% stake could easily get chopped down to 1% or .5% on liquidation due to various means. Assuming a five year growth-to-liquidation, does 1% of a $100m sale ($1m) justify taking no salary for 2-3 years and then a below-marketing salary for the remaining time? Balance that with the risk that the startup may fail, not raise as much money as they thought, etc...
A least two key factors you need to think about are (1) what you expect the company to get acquired for, and (2) when you expect to be acquired. A $10m sale in year 1 means you get $50k-$100k (being optimistic) for one year of work. A $10m sale in year 3 means you get $50-$100k for three years.