'expert on this topic' is a correct and usable phrase in written English that you can use to refer to someone who has a high level of knowledge about a particular topic.
For example, "I consulted an expert on this topic to gain more insight."
Why are you an expert on this topic?
Why was he so expert on this topic, presenter Victoria Coren Mitchell wondered.
Let the content aside, you are an expert on this topic.
Finkin, a law professor at Illinois, is a long-time expert on this topic, as is Post, who is now the Dean of the Yale Law School.
Joining us as our speaker and facilitator is an expert on this topic - Professor Barbara Rogoff, UC Santa Cruz Distinguished Professor of Psychology, Harvard PhD '77.
That is, the level of depth at which it treats any given topic is determined by the question, "What does an investment professional who is not an expert on this topic need to know about the topic?" The MFin program, while providing this generalist perspective, also goes into considerable depth.
The Islanders should be experts on this topic, because they have played short-handed more than any other team in the National Hockey League this season.
He said: "If I had a message for David Cameron, I would say for once listen to, read and watch what the experts on this topic are saying and then do something about it because if he doesn't this can have a knock-on effect on the economy". The government's official helpline – 0800 55667777 – advised people in badly affected areas to avoid any physical exertion on Thursday.
The aim of this workshop was to establish a network of experts on this topic and to promote knowledge exchange between scientists, regulators, practitioners and stakeholders.
As I said in the beginning I don't think Thom and I are experts on this topic but we do spend a lot of time talking about it and making it work for us.
