How to pass a property to a soapUI project in jenkins through maven

Is there a way to define a project level property in the maven command script. I realise I can add a property to the pom but wish to do it through the invoke top level maven targets section in jenkins. I have tried clean test -DtagProject="firstTag" but it doesn''t overwrite the current property of tagProject="secondTag" which is stored in my soapUI.xml project.