Subregional Mobility Managers

Billy Parker

East Valley

Justin MacGregor

West Valley

Mark Botterbusch

Central Area

Robert Mawson

Central Arizona Governments (Rural Area)

Billy Parker

Chandler/Gilbert Arc

Billy’s career in Intellectual and Developmental Disabilities (I/DD) happened quite by accident and out of necessity in 1983 while raising a young family in Dixon, Montana (pop. 150). After finding that I/DD was a natural fit, Billy continued in Montana, then Oregon, and now, Arizona where he has been with Chandler Gilbert Arc since 1994 accepting the position of Executive Director in 2013 and completing his Master of Administration with Leadership Emphasis through Northern AZ University. Billy's career has seen great diversity through management of multiple services in multiple states where he specializes in Coordinated Mobility, Systems Development, and Resource Coordination.

The Arc Logo


3250 N San Marcos Place
Chandler, AZ 85225


(480) 892-9422
Email Billy

Justin MacGregor


Justin MacGregor is Sub-Regional Mobility Manager for the West Valley. An Air Force veteran who believes in service before self, Justin has worked for over 5 years at Scottsdale Training and Rehabilitation Services (STARS), a center for individuals with intellectual and developmental disabilities that hosts day programs, on-site work centers, community-based employment training opportunities, and transition programs for young adults. As the Fleet Maintenance and Facilities Manager, Justin is responsible for making sure all vehicles are serviced and running at top performance, and that STARS facilities are maintained and operated in accordance with all regulations and guidelines. As a Sub-Regional Mobility Manager, Justin aims to support you as you work to provide safe and reliable transportation for elderly individuals and those with disabilities.

Northwest Valley Connect logo


11130 East Cholla Street
Scottsdale, AZ 85259


(480) 339-1063
Email Justin


Documents on this page are subject to change. Please contact mobility manager for latest versions.



Mark Botterbusch has been in the field of human services since age 16 starting in a domestic abuse shelter as a child advocate. He through college in a hospital inpatient psych unit, and then to outpatient counselling and EAP evaluations after graduation. He then moved into community based services for at risk youth in PA, overseeing multiple programs. He next developed a community based program for at risk youth with Value Options, and oversaw a residential living department. Mark is currently the VP of Operations at Gompers. Mark’s personal drive throughout his career is to be a voice or action for those who can’t or may not know how. He has a strong belief in the dignity of risk and allowing others to attempt things in life, whether they succeed or not. Mark believes that this work, day in and day out, is to make life better for people who otherwise may not have the opportunities to improve their quality of life.


6601 N 27th Ave.
Phoenix, AZ 58017


(602) 336-0061
Email Mark

Robert Mawson

Central Arizona Governments (Rural Area)

Robert Mawson is the Mobility Manager for The Central Arizona Governments (CAG). CAG was incorporated in 1975 and is one of six regional planning districts, or Councils of Government (COGs), which was established by Executive Order 70-2 and signed by the Governor of Arizona to provide effective regional planning services to Gila and Pinal counties.

CAG logo


2540 W. Apache Trail, Suite #108
Apache Junction, AZ 85120


(480) 474-9300

A strategy outlined in the MAG Human Services Coordination Transportation Plan is the utilization of sub-regional mobility managers to enhance and promote regional mobility coordination planning efforts in the region. This has included identifying sub-regional mobility managers as community liaisons for the East Valley, West Valley, and the Central Area of the MAG region. The sub-regional mobility managers participate in designated workgroups, provide feedback on trainings, and provide support for regional coordination strategies outlined in the MAG Human Services Coordination Transportation Plan.

Vehicle Sharing

Vehicle sharing is a unique program that involves vehicles acquired through a federal grant program. Agencies share an accessible vehicle that enables people with disabilities to get out of their homes. Many social services say that a major challenge they face is a lack of transportation as public transit options may not be the best fit.

Human Services Transportation Planner I
Hezequias Rocha

About MAG

The Maricopa Association of Governments (MAG) is a Council of Governments (COG) that serves as the regional planning agency for the metropolitan Phoenix area.

Title VI

Title VI requires that no person in the United States of America shall, on the grounds of race, color, or national origin, be excluded from the participation in, be denied the benefits of, or be otherwise subjected to discrimination under any program or activity for which MAG receives federal financial assistance.

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    Phoenix, Arizona 85003

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