Barry Callen
Barry Callen is a highly sought-after marketing consultant, speaker, author, and writer with 30 years experience working with some of the world's largest corporations. He invented the innovative PitchPerfect message-development strategy system.
Barry Callen is a highly sought-after marketing consultant, speaker, author, and writer with 30 years experience working with some of the world's largest corporations. He invented the innovative PitchPerfect message-development strategy system. See less
