Do I need a broker to help me find office space?

No. The internet has many sites that have spaces for lease. What you need a broker for is their expertise of the entire leasing process. A good broker does much more than just find the space; you should view them as you would your attorney or CPA. You want their advice as to what space is best suited for your business and the best terms achievable. A good broker will help you in all aspects of the commercial lease transaction. Finding the space is just one small step in the overall process.