The phrase "appeared as a speaker" is correct and usable in written English.
It can be used when describing someone's role or participation in an event, such as a conference or seminar, where they were invited to speak.
Example: "At the annual conference, Dr. Smith appeared as a speaker on the topic of climate change."
Alternatives: "served as a speaker" or "was a speaker".
He has appeared as a speaker alongside neo-Nazis and skinheads, and once starred in a video that compares dark-skinned Caucasus militants to cockroaches.
Mr. Aronsohn, who on Sunday appeared as a speaker at the Toronto Screenwriting Conference, told The Hollywood Reporter that the pendulum had swung too far in the direction of comedies centered on female protagonists, like "2 Broke Girls" (which is shown on CBS) and "Whitney" (NBC).
I do not remember ever to have appeared as a speaker before any assembly more shrinkingly, nor with greater distrust of my ability, than I do this day.
(Schauss is also on the scientific advisory board of MonaVie and appears as a speaker at the company's conventions, which can resemble revival meetings).
This article was amended on 23 February 2016, to clarify that Philip Pullman resigned as patron of the Oxford Literary Festival, not necessarily from appearing as a speaker in the future.
So attendees at Silicon Valley startup incubator Y Combinator's annual Startup School event tomorrow are in for a real treat: Zuckerberg is slated to appear as a speaker, kicking off the day-long program being held at Stanford University in Palo Alto.
An active duty service member, in or out of uniform, may not appear as a speaker at any political event.
The Republican National Committee reacted by withdrawing an invitation for Huntsman to appear as a speaker at a Republican fundraiser in Palm Beach, Florida, in early March.
Browne wasn't talking to the media after the 2007 embarrassment, so Ronson signed up for a cruise for Browne fans where she appeared as a guest speaker.
And that perhaps explains the sellout crowd when Mr. Ghosn appeared as a lunch speaker at the Japan Society in Manhattan on Thursday, with a talk titled The New Normal: Driving Change Through Crisis.
Since then, he has appeared as a motivational speaker around the country, and has set up a company, Legacy Holdings, to explore his interests in real estate and private investment.
