There are so many government contract opportunities that get passed by because many believe that there is one central website that caters to contract business. Federal Business Opportunities is the most popular site that receives a large portion of online traffic, But wait! I have good news many government agencies post opportunities internally as well as to www.FBO.gov. I have compiled a list of the top five websites that I have personally utilized that will assist you in your success. Note: some websites mentioned also cater to subcontracting opportunities as well.
All of the sites require business registration that is similar to fedbizopps so be sure to have the typical information such as DUNS number, Tax ID/EIN, point of contact, etc. If the websites provided does not suffice your needs you can always venture back to Federal Business Opportunities.