I've had a business proposed to me by a group of investors. The offer is a salary plus 25% ownership in a new company. They mentioned developing multiple outlets/sites, 1 now and an additional site as early as next year. If the company does not profit off the first location and the investors must pump new capital into location #2 does this dilute my ownership.
I will not be contributing anything monetary, only my knowledge and expertise in the field.
Your contribution is called sweat equity. If there is equity raised after yours there is usually some form of dilution, how much will depend on the valuation at the successive rounds of equity raised. Do a search on angel round venture capital or series A financing for some specific tips.