This is a question you should ask yourself before hiring a surveyor or engineer.  The answer to this question is easier to find then you may realize.  The Massachusetts website has a service for easily finding professional licensing in MA for many fields.  For example, here is a link to my Professional Land Surveying license, and a link to my Professional Engineering License.  Unfortunately, there are many companies that offer surveying services and engineering that are not licensed.  Do yourself a service and look them up before you decide to hire them.  Land Planning, Inc offers Free Estimates for all of our professional services.