The Shadow Above The Flames - The Fate of Dragons Series, #1

You'd better pray your M16 assault rifle can slay a dragon. Henry Morgan's post-military plans were simple: quiet days, normal life. But once the Union Forest Corporation accidentally awoke a long-forgotten dragon from its slumber beneath the fields of Ireland, "normality" ceased to exist. Union Forest is far less concerned about the dragon terrorizing the planet than they are about protecting their own corporate assets.
Somewhere in the drilling-site the dragon now calls home, there's a data core the company desperately wants to retrieve. When Henry learns his estranged brother Rick is among the force of elite commandos sent by Union Forest to battle the danger at the drilling site, he's forced back into his old roles of soldier and protective older sibling. He'll do everything he can to save his brother .