There are many ways to market your cad design services. You can approach architecture firms and civil engineering firms. You can also contact interior design firms and offer your services. You can even start a small business and offer occasional services to clients cad drawing services. You'll need to market your cad design services like a pro to attract clients. Once you've established a good reputation, you'll want to find clients for your services. However, there are many steps you need to take to make sure you're getting the most bang for your buck.