Develop presentation materials for raising capital from angels, VCs, or other sources. I have raised over $40 million in early-stage capital for my own companies, and far more helping others. This is NOT usually mostly a writting job. It is about getting the company busines model, market entry strategy, competitive intelligence comparisons and story for success down well. Synthesizing it into a simple strategy for slaes, marketing, operations, product/service development and finance. I also do financial simulators (far better than proformas).