John McMahon - Chief Executive Officer

John McMahon most recently served as the executive director of the National Ski Patrol, bringing extensive local and national association management and far-reaching work with other outdoor-related industries to ALCC. His experience with associations, as well as his passion for everything outdoors, made him a perfect fit to lead ALCC.

John’s private sector and non-profit leadership experience includes positions with the Breckenridge Tourism Office, Monterey County Convention and Visitors Bureau, and Vail Resorts and Loveland Ski Area. The governor of California appointed him as a deputy director and chief of marketing for the California State Parks in 2000, which attracted 84 million visitors annually and contributed $2 billion to local communities at the time.

A Colorado resident for over 40 years and raised in Aspen, John now lives in Denver. John loves being outside and is very active in many outdoor activities with his family, friends, and border collie named Zoe. In fact, John often can be spotted paddle boarding with Zoe on Colorado’s lakes and rivers. John also has two grown children, Tess and Paige, who live in New Hampshire and Colorado.

Melissa Emdin - Programs & Education Director

Melissa oversees the Landscape Industry Certification program, ProGreen EXPO speakers, the ELITE Awards, CEO Exchanges, and many more programs. Melissa comes to ALCC after more than a decade of program management and association experience, specializing in certification. She is excited to meet ALCC members and help provide education to meet their needs. Melissa enjoys spending time with her husband Will, sons Owen and Oliver, and dog Parker.

Christy Eull - Communications Director

Christy Eull will lead the Communications department with direction and management of multiple communications channels to provide content of interest to ALCC members and the general public. Christy brings more than a decade of experience in marketing communications, copywriting, digital marketing and more, with undergrad degree from the University of Minnesota and a master's certificate from the University of St. Thomas in Minneapolis, MN. As a newer Colorado resident, Christy enjoys spending time exploring CO and being outdoors with her family which includes her husband, Adam, son Henry, daughter Harper and dog Willow. 

 Tammy DiFalco - Membership & Sponsorship Director 

Tammy works with both members and sponsors to deliver value and ensure the best possible member experience. Her favorite part of this role is meeting and getting to know ALCC’s amazing community. She has previous association membership experience and earned her B.S. in Business Administration from Colorado State University. Tammy enjoys spending time with her family and getting outside as much as possible to enjoy all that Colorado has to offer.  

Amanda Mills - Events & Program Coordinator

Amanda Mills, our new Events and Programs Coordinator, has an extensive background in program coordination, project management, administration, and events. This experience includes founding an arts and activism non-profit (Murmur Media) and working as Head of Programs at another. Collaboration, empathy, and communication are key workplace values for her. A recent transplant from Atlanta, Georgia, Amanda is enjoying building a home in Denver and at ALCC! When not working, she loves spending time with her son, reading (she is in three book clubs), watching film ranging from arthouse to action movies, doing crosswords, and going to live music shows.

Rachael Coleman - Office Manager

Rachael handles telephone inquiries for ALCC, marketing and registration for events, fulfillment of bookstore orders, and supports all departments from accounting to membership. Her most recent work experience was in the world of finance, where she supported a team of financial advisors in the New York City area. Her experience in retail management and high-level administrative support makes her a customer service pro when it comes to serving member needs.