John Sutton and Arlene Mitchell (deceased), Senior Research Associates at RMC Research, Denver, CO are interviewed as part of the National Council of Supervisors of Mathematics (NCSM) resources to support mathematics coaches (http://www.mathedleadership.org/coaching/interviews.html or https://www.youtube.com/watch?v=7T_-MJGQLD0). The interview took place at the NCSM National Conference in Boston, MA in April 2015. John and Arlene were leaders for and contributed strongly to the research undertaken by the NSF-funded Examining Mathematics Coaching project (2009-2015), in partnership with Montana State University and the University of Idaho. John and Arlene have given numerous presentations at state, regional, and national conferences on the research and implementation of coaching at the school and district levels. Additionally, they have worked with a number of school districts to help plan and deploy mathematics coaching models to support mathematics teaching and student success in mathematics. Questions answered through the interview with NCSM are listed below.