Looking for plumber

I’m looking for a plumber certified to do gas line work. A Peoples Gas inspector left a pink card stating “Your riser (where the gas line comes out of the ground at the meter) has an unsafe condition.” It is not a leak, but it’s possible that the riser and line to the street must be replaced. I don’t know. If anyone knows a reputable, reasonable plumber who can do gas line work, it would be greatly appreciated. Thank you in advance. James