Who's Who of Top Executives

PROFESSIONAL HONOREES​

Tag: National Alliance for Mental Illness

Shannon Collins-McDuffie

December 6, 2021

Title: Chief Executive Officer Company: Diamond Counseling Location: Ashburn, Virginia, United States Shannon Collins-McDuffie, Chief Executive Officer at Diamond Counseling, has been recognized by Marquis Who’s Who Top Executives for

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Marquis Who’s Who was established in 1898 and promptly began publishing biographical data in 1899. More than 120 years ago, our founder, Albert Nelson Marquis, established a standard of excellence with the first publication of Who’s Who in America.

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