Welcome
SOA is dead some say. Still many of the new systems built today are using service oriented architecture. This of course needs special attention from QA. As usual you need to work with the requirements, development process etc. Furthermore, SOA can force you to work hard with performance and security issues. Also, the technology means that the testers need to learn new interfaces and tools.
On this site you can find good information helping you to succeed in your SOA project.