M
- Jocelyn Maciol
- Jaime Madrigano
- Margaret A. Maglione
- Giulia Maistrello
- Nipher Malika
- King Mallory
- Giovanni Sean Paul Malloy
- William Marcellino
- Krystyna Marcinek
- Zuzanna Marciniak-Nuqui
- Louis T. Mariano
- Sonja Marjanovic
- M. Wade Markel
- Timothy Marler
- Jefferson P. Marquis
- James V. Marrone
- Elizabeth Marsolais
- Bradley Martin
- Laurie T. Martin
- Jeffrey Martini
- Steven C. Martino
- Grant R. Martsolf
- Richard Mason
- Dara Massicot
- Jason Mastbaum
- Benjamin K. Master
- Jason Matheny
- Megan Mathews
- John Matsumura
- Luke J. Matthews
- Miriam Matthews
- Samantha Matthews
- Paul W. Mayberry
- Lauren A. Mayer
- Michael J. Mazarr
- Ryan K. McBain
- Samantha McBirney
- Sara G. McCleskey
- Bruce McClintock
- Maria McCollester
- Jennifer Sloan McCombs
- Bear McConnell
- Dan McCormick
- Claudia L. McCowan
- Caitlin McCulloch
- Tim McDonald
- Ronald G. McGarvey
- Michael McGee
- Geoffrey McGovern
- Molly F. McIntosh
- Megan McKernan
- Gary McLeod
- Michael J. McNerney
- Sarah O. Meadows
- Erik Meijer
- Robin Meili
- Peter Mendel
- Alexandra Mendoza-Graf
- Lance Menthe
- Lisa S. Meredith
- James Merewood
- David Metz
- Katya Migacheva
- Jim Mignano
- Kata Mihaly
- Benjamin M. Miller
- Candice Miller
- Laura L. Miller
- Patrick Mills
- Michelle E. Miro
- Ian Mitch
- Jim Mitre
- Yuji Mizushima
- Erik Mobrand
- Joy S. Moini
- Jared Mondschein
- Pauline Moore
- Sam Morales
- Jamie Morikawa
- Katherine I. Morley
- Jennifer D. P. Moroney
- Andrew R. Morral
- Immaculate Dadiso Motsi-Omoijiade
- Christopher A. Mouton
- Erik E. Mueller
- Karl P. Mueller
- Luke Muggy
- Andrew W. Mulcahy
- Christine Mulhern