Anyone who has done any lobbying realizes lobbyists, for the most part, are mercenaries. They go wherever the paycheck is and if they have ten minutes of free time they fill in with another client. MOST work for dozens of organizations. They peddle connections, not ideology. A paid career working for the NRA and another conservative group is not at all surprising. It also isn't anything at all new.
I think the NRA has generally been lopsided in supporting Republicans, but they have also supported a few Democrats who supported gun rights and infuriated paying members. Everyone forget the last election cycle?
I'm no fan of the NRA as a defender as the 2A, as my sig indicates, but I saw this article and laughed.