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Phil Kosanovich, MBA
President & Chief Executive Officer

Phil has a senior leadership profile that spans from entrepreneurial ventures to global corporations. His experience includes consulting, operational, and executive-level roles in the behavioral health and addiction treatment industries that include co-founding and growing two residential and outpatient treatment centers. Phil is an inclusive and transformational leader with a reputation for building strong client/patient-centered teams focused on clinical excellence. He has an extensive record of success in leading companies through transitional periods of growth and creating and maintaining strong external partner relationships.

Phil’s expanded healthcare industry experience was with Landauer, where he started two subsidiary companies and led company operations in Australia and China. Prior to his 30 years in the healthcare industries, Phil was president of human resource and financial services related subsidiaries of Travelers, Equitable, Lincoln Financial Group, and Chicago Title & Trust. He has served on the executive board and in multiple leadership roles of a global human resources trade organization and elected into that industry groups Hall of Leaders. Phil has served on the boards of several healthcare-related charities and is the Chair of the Community Relations Commission in his hometown. Phil earned an MBA from DePaul University and a Bachelor of Science in Business Administration from Valparaiso University. He is in long term recovery.

Author’s publications

Celebrating National Recovery Month: Hope is Real. Recovery is Real.

By Phil Kosanovich, MBA on September 5, 2024
Celebrating National Recovery Month This September As September unfolds, we at Cornerstone of Southern California join millions across the nation in observing National Recovery Month. This annual celebration shines a spotlight on substance use treatment and mental health services, reminding us all that recovery is possible and that every journey toward healing is worthy of […]
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The Growing Danger of Fentanyl with Xylazine & Treatment Options

By Phil Kosanovich on October 25, 2023
Fentanyl and Xylazine: The Increasing Dangers and Treatment Options In the last 10 years, the dangers of Fentanyl exposure have become increasingly more wide spread, including and especially across public platforms and social media. And though both healthcare professionals and government establishments, including the U.S. Department of Justice Drug Enforcement Administration (DEA), the Federal Drug […]
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September is Suicide Prevention Month | Cornerstone of Southern California

By Phil Kosanovich, MBA on September 11, 2024
September is Suicide Prevention Month: Raising Awareness and Saving Lives September marks a key time in mental health advocacy: the National Suicide Prevention Month. This observance is not only a call to raise awareness about suicide and its often-devastating effects but also an invitation to become actively involved in the movement towards prevention. At Cornerstone […]
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The Value of Staying Sober “One Day at a Time”

By Phil Kosanovich, MBA on May 2, 2024
“On a day-at-a-time basis, I am confident I can stay away from a drink for one day. So, I set out with confidence. At the end of the day, I have the reward of achievement. Achievement feels good and that makes me want more!” – Bill Wilson, founder of Alcoholics Anonymous The phrase of taking […]
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Why Choose Cornerstone of Southern California?

By Phil Kosanovich, MBA on May 2, 2024
Since 1984, Cornerstone of Southern California has pioneered addiction treatment in Southern California under the direction of Dr. Michael Stone. Cornerstone is in the beautiful setting of Orange County, California and offers a network of licensed dual diagnosis mental health and addiction treatment centers alongside many sober living homes. We specialize in the full spectrum […]
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