Invo Leadership

Lisa K. Miller

Interim Chief Executive Officer, Chief Operating Officer

Lisa Keise Miller translates vision into impact through sound strategy and operational excellence. She is a passionate leader who sets a culture of high expectations and continuous improvement, while at the same time has a reputation for developing and coaching individuals to build winning teams.

Lisa started her Invo journey as COO, and recently took on the role of Interim CEO. She is responsible for executing on the organization’s vision to transform the autism industry and deliver great outcomes for the families Invo serves.

Prior to joining Invo, Lisa served as Vice-President of Operations for Davita Kidney Care where she directed clinical, operational, and business development outcomes on behalf of end-stage renal disease patients in multiple geographies, most recently responsible for over 1200 teammates and $275 million in revenue. Before DaVita, Lisa spent 12 years working in the education industry, first as a high school educator and then in various senior leadership roles for both non-profit and for-profit education reform organizations. In these roles she has launched organizations into new markets, hired and developed teams to execute on organizational priorities, designed and implemented accountability systems, and led operations of diverse teams domestically and internationally.

Lisa holds an MBA from Columbia University Graduate School of Business, MS in Neuroscience from Robert Wood Johnson Medical School, and BA in Biology from Rutgers University. Outside of the office, Lisa enjoys photography, traveling and all things family with her husband, Eyrique, and children, Jordan and Blake.

Steve Flack

Chief Financial Officer

Steve joined Invo Healthcare in October, 2020 as Chief Financial Officer with experience guiding teams and organizations in rapidly changing business environments. For more than thirty years he has been helping to transform businesses through development of finance organization strategy and processes to meet the future needs and direction of the company driving aggressive growth and shareholder value. He is helping to lead a culture of financial discipline and internal control while providing trusted advice, both from a strategic and tactical perspective.

He is attracted to the mission of the company and the passion and belief in serving children in the home, school and center settings. Through his experience in multi-site healthcare services businesses, both on the payer and provider side, he is working across the business to maximize the efficient use of resources while providing support to the key operational and clinical leaders focused on proving superior outcomes.

Most recently he spent more than seven years helping to grow a multi-site outpatient provider of occupational healthcare services and previously worked as CFO for two provider owned health plans, a leading provider of healthcare cost containment solutions, as well as a start up health insurance company. Earlier in his career, Steve spent fifteen years with a leading insurance and financial services organization in progressive financial management roles, including seven years in the London reinsurance market.

Steven received a Master of Business Administration degree from the Lake Forest Graduate School of Management, where he graduated with honors and recognition as a Hotchkiss Scholar. He holds a Bachelor of Science in Accounting and Finance from Northern Illinois University. Steve earned credentials as a Certified Public Accountant with the State of Illinois in 1985 and is an active member of the Illinois CPA Society and the American Institute of Certified Public Accountants.

Andrew Mark

Chief Development Officer

Andrew serves as Senior Vice President, Corporate Development and Strategy of the Invo Family of Companies. In his role, Andrew is responsible for leading all aspects of the company’s aggressive acquisition growth strategy including sourcing, execution, planning, and integration.

Prior to joining the organization, Andrew was an investment professional with The Wicks Group, a private equity firm in New York, where he focused on control equity investments in companies across a number of sectors and worked closely with the executive teams of his portfolio companies on strategy and operational initiative.

Previously, Andrew was in investment banking at Bank of America Merrill Lynch, where he advised clients on mergers, acquisitions, and financings. Andrew holds a Bachelor of Arts in Economics and History from the University of Pennsylvania.

Matt Stringer

President, School-Based Services

Matt currently serves as the President over all school and agency related behavior, mental health and special education therapy services. As President, Matt manages all aspects of the daily business operations as well as driving the overall growth and development strategies for this business. Matt brings more than 18 years of experience leading development and operations teams and helping companies accelerate growth.

Prior to moving into the President role, Matt served as the Senior Vice President of Growth and Development at Invo where he led company growth initiatives. Matt has spent much of his career working with large urban school districts across the country to support the development and implementation of behavior and special education initiatives. In addition to his work at Invo, Matt has managed and delivered similar initiatives while serving as the Vice President of Business Development for Learn It Systems, Vice President of Sales and Marketing for both Progressus Therapy and Catapult Learning and in the various sales and operations leadership roles prior to that.

Matt holds a Bachelors degree from George Mason University in Business Administration and Management. Outside of the office Matt enjoys the outdoors and spending time with his wife and three children in Tampa, FL.

Rob Dugger

Vice President, People Services

Rob Dugger was named Vice President of People Services in September 2021. Rob brings more than 20 years of Human Resources experience to his role at Invo. He has extensive experience transforming a People Services function into an operationally excellent group that build strong partnerships with their business customers.

Prior to joining Invo, Rob served as SVP, Human Resources for HearingLife, a hearing healthcare company. He also served 10 years at DLL Financial in various global roles including VP HR for North America and 11 years in various roles at GMAC.

Rob lives local to the Doylestown area with his wife and three daughters. In his free time he enjoys traveling the world and playing racquetball.

Rich Maston

Senior Vice President of Patient Operations

Rich Maston is our Vice President of Patient Operations. He began with Autism Home Support Services (AHSS) as a Family Support Coordinator and became a favorite with clients and employees alike. He has subsequently and deservedly been advanced to the title of Family Support Director. He brings to the team significant experience as a director of clinical services for Lauren’s Institute for Education, where he supervised an interdisciplinary team of more than 40 speech, music, physical, occupational, and habilitation therapists. Previously he has also acted as principal/director, providing individual and group music therapy services, as well as developing marketing strategies for both commercial ventures and nonprofit human services agencies.

Rich received his Bachelor of Arts in business economics with a minor in music from the College of Wooster in Ohio. He has also completed the music therapy equivalency program at Arizona State University and the Board Certified Assistant Behavior Analyst program at Penn State University World Campus. Rich is an excellent resource for any parent with a child on the spectrum and is able to offer great insights into successful therapy.

Lisa Orlando

Senior Vice President, Marketing and Strategy

Lisa currently serves as the Senior Vice President, Marketing and Strategy of the Invo Family of Companies. Lisa has successfully leveraged her strategy and marketing expertise to secure the company's position as the leading therapy and behavioral services organization in the country, serving children from birth to 21 in schools, homes and centers.

Prior to joining the organizaton, Lisa was the Director of Marketing and Communications for the Pediatric Cancer Foundation, a national non-profit organization with the mission of funding much needed research for new pediatric cancer treatments. During her time with the Foundation, Lisa led the creation of scalable, sustainable fundraising events, such as Fashion Funds the Cure. She was also an integral member of the team that founded The Sunshine Project, one of the country’s first national research alliances dedicated to pediatric cancer. Lisa started her career in advertising and public relations with The Chisholm-Mingo Group, an urban advertising agency in New York City. Working with national brands including Royal Caribbean, Denny’s/Advantica, Texaco, as well as government accounts including Amtrak, Census 2000, US Army and others, Lisa helped companies create meaningful relationships within urban markets through effective public relations and promotional campaigns.

Lisa is a graduate of Emerson College, where she received her BFA in Writing, Literature and Publishing. A native New Yorker, Lisa currently resides in Tampa with her son Cole.

Brittany Wierzba

Senior Vice President, Clinical Standards

Brittany Wierzba is a behavior analyst with a passion for clinical quality and operational excellence. As a freshman in college, Brittany took an introductory course in learning and applied behavior analysis and immediately fell in love with the science of behavior. After graduating from Fairfield University with a Bachelor’s of Arts in Psychology and French, Brittany moved to Wisconsin to pursue Masters and Doctoral degrees in Experimental Psychology with a focus in Applied Behavior Analysis at University of Wisconsin-Milwaukee. Following graduate school, Brittany re-located to Phoenix, AZ and then Sarasota, FL, where she worked as a clinician. Brittany has been a part of the Invo Family of Companies since March 2017, when she joined the Engage Behavioral Health team in Tampa, FL. Through experiences with precision teaching, severe challenging behavior, interdisciplinary collaboration, early intervention, staff and caregiver training, development of systems and processes, and operational leadership, Brittany has cultivated a mission to support the clinical operations team at Invo to provide evidence-based, outcomes-driven ABA therapy to clients and to pursue innovative models of care that are mutually beneficial for families, other stakeholders, and the Invo team.

Brittany currently resides in Sarasota, FL with her husband and two children. Outside the office, Brittany enjoys cooking, yoga, cycling and spending quality time outdoors with her family.