Research/Academics are a dime a dozen. There are multi-thousands of them. CEO of a major oil company is a pretty rare position. Not many of them on the planet. So not a valid comparison. Now, if there were multi thousands of oil company CEO's you might be on to something.
You made no comments about Judith Curry's assertions. She believes that climate change is a problem but not near to the level the alarmists scream about. Is she also a denialist in your eyes?