Leadership

Leadership

Denova Leaders

Welcome to Denova Collaborative Health’s Leadership Page, where innovation meets expertise. Our accomplished leadership team is committed to transforming healthcare and providing unparalleled service to our community through compassion, adaptability, innovation and reliability.
Our leadership team embodies these values, working tirelessly to ensure that Denova remains at the forefront of healthcare advancements. Get to know the visionaries driving our success and leading the charge toward a healthier future.
Opens a pop up window introducing Graham Johnson

Graham B. Johnson, MAcc, CPA

Chief Executive Officer

Silvia Garcia, MSW, MPA

Chief Administrative Officer

Opens a pop up window introducing Heidi Cortez

Heidi Cortez, CPA

VP of Accounting and Finance

Opens a pop up window introducing Stephanie Howard

Stephanie Howard, MBA

Vice President, Operations

Opens a pop up window introducing Jessica Patriquin

Jessica Patriquin, PMHNP-BC, BC-TMH

Vice President, Psychiatric Services

Opens a pop up window introducing Henry Haun

Henry Haun

Vice President, Patient Experience and Engagement Center

Angela Roumain RN, MPH, CPHQ

Vice President, Medical Operations and Quality

Anna Joyce, LPC, BC-TMH

Vice President, Behavioral Health

Opens a pop up window introducing Graham Johnson

Graham B. Johnson, MAcc, CPA

Chief Executive Officer

As the CEO of Denova Collaborative Health, Graham spearheads the strategic vision and operational success of the company. With a direct supervisory role over key executives, Graham’s leadership extends across various departments. Before taking on the role as CEO, he was an integral team member as Denova’s CFO, bringing extensive experience from a 15-year tenure at Deloitte & Touche. His expertise in audit engagements and financial strategy in diverse sectors like Technology and Healthcare helped bolster Denova’s growth. Graham’s academic achievements include a BS and a Master of Accountancy from Brigham Young University, and a CPA certification. Outside work, Graham dedicates time to mentoring youth at his church and enjoys family time with his wife and four children.

Silvia Garcia, MSW, MPA

Chief Administrative Officer

Silvia Garcia, is a first-generation Arizona native committed to serving communities of diverse backgrounds and bridging social gaps that deter equity. She leverages over a decade of social service experience to drive systemic improvements to the quality of life in Arizona. She has led statewide initiatives that address determinants of health and reflect her commitment to health equity. Working in both public and private environments, Silvia has a vast understanding of how to deploy a professional, results-driven management system that tracks and improves performance every day. Silvia’s educational background includes a Bachelor’s in Psychology and two Master’s degrees in Social Work and Public Administration from Arizona State University. As a co-founder of a club soccer organization, Silvia actively promotes activities that encourage youth to reach their full potential. In her free time, she enjoys spending time with her husband and children, traveling, outdoor adventures, and reading.

Opens a pop up window introducing Heidi Cortez

Heidi R. Cortez, CPA

Vice President, Accounting and Finance
As Vice President of Accounting & Finance, Heidi leads all accounting, finance, and payroll functions.  She is an experienced leader with over 25 years supporting for-profit and not-for-profit organizations at national and global levels.  Her experience includes extensive involvement with acquisitions, divestitures, and software implementations.  Heidi leads by example and promotes a team environment based on the foundation of trust, accountability, and continual personal and professional development. Outside of work, Heidi is an avid reader but enjoys experiencing life by traveling, loving on animals, and spending time with family and friends. 
Opens a pop up window introducing Stephanie Howard

Stephanie Howard

Vice President, Operations

A native Arizonan, Stephanie has worked within non-profit healthcare systems for more than 15 years. During that time, her accomplishments have been focused on expanding services to communities across Arizona by improving access to care. Stephanie has extensive experience working with revenue cycle, clinic support services, and operations. 

She has a deep respect and understanding for process improvement, in turn improving the healthcare experience for the local community. Stephanie has a Bachelor of Arts in Education from Arizona State University and a Master’s degree in Business Administration from Grand Canyon University. Additionally, she has completed training in Lean, Six Sigma, and Black Belt. 

Outside of work, Stephanie is a certified barre instructor, and she enjoys hiking, running, and more. She also loves spending time with her family, friends, and dogs.

Opens a pop up window introducing Jessica Patriquin

Jessica Patriquin, PMHNP-BC, BC-TMH

Vice President of Psychiatric Service

Jessica’s extensive nursing background and 11 years tenure at HonorHealth, coupled with her Master’s degree in Psychiatric Mental Health, highlights her expertise and commitment to the mental health community. She has over 18 years of experience ranging in a variety of capacities: bedside/inpatient care, outpatient clinical care, and a variety of administrative roles. Throughout her career, she has always been driven to focus on the mental health community. This passion sparked during her nursing journey working on a unit focused on observation of acute psychiatric patients. Since then, she has done a great deal to pursue advancements in her education and career to work towards making an impact in the mental health community. Outside of her work, she loves traveling, hiking AZ trails, working out at her local CrossFit gym, and spending time with her partner, family, and friends.

Opens a pop up window introducing Henry Haun

Henry Haun

Vice President, Patient Experience and Engagement Center
Henry Haun serves as the Vice President of Patient Experience at Denova, where he is dedicated to enhancing customer satisfaction and driving operational excellence. With a proven track record of leading high-performing teams, implementing innovative strategies, and optimizing service delivery, Henry has played a key role in boosting satisfaction scores and improving team performance. His expertise in data-driven insights and employee development has made a significant impact across the organization. Henry holds a degree in General Studies, is a Six Sigma Black Belt, and a Certified Associate in Project Management. He also maintains an Active Life and Health license in Arizona, along with several other professional certifications. Outside of work, Henry loves traveling with his wife and two daughters, exploring new cultures, and embracing the outdoors. He values a healthy lifestyle and enjoys spending time with a diverse circle of friends.

Angela Roumain RN, MPH, CPHQ

Vice President of Medical Operations and Quality

Angela Roumain leads Denova’s Primary Care operations and the Population Health, Compliance, & Quality programs as the Vice President of Medical Operations and Quality. With a nursing degree from Arizona State University and a Master’s in Public Health from the University of Arizona, she serves as the strategic facilitator and implementer, creating and managing successful outcomes through continual process improvement. Outside of work, Angela enjoys spending time with her husband and their 4 boys. She enjoys hiking, yoga, and caring for her flock of backyard chickens.

Anna Joyce, LPC, BC-TMH

Vice President, Behavioral Health

As Vice President of Behavioral Health, Anna brings a variety of mental health experiences to Denova, including working with individuals, families, eating disorder treatment, providing SMI evaluations, and providing supervision to clinicians and Clinical Directors. Her academic journey began with a BS in Psychology from Carroll University, followed by an MA in Professional Counseling from Ottawa University. Anna’s expertise in Tele-Mental Health and her role in implementing virtual care platforms at Denova have been instrumental for the company’s success. She enjoys spending her free time with her family, watching baseball, traveling, working out, and being outdoors. Anna is a strong advocate of health and physical wellness.