Rooted in Arizona, built on purpose.
Three co-founders. Three last names. One shared belief — that great healthcare begins with great spaces, great people, and an unwavering commitment to community.
The People Behind GMC
Three names. One mission.
GMC isn't just an acronym — it's a promise kept by three individuals whose last names, Garneata, Mallari, and Cosman, became the foundation of something far greater than any one of them could have built alone.
Adrian Garneata
Co-Founder & Operations
Adrian brings an extraordinary eye for detail and a craftsman's dedication to every project he touches. His expertise in construction and renovation has been the physical backbone of the GMC enterprise — transforming spaces into places people are proud to call home.
Randy V. Mallari
Co-Founder & Medical Director
Randy is the clinical heart of GMC Health. As a dual board-certified Psychiatric Mental Health Nurse Practitioner and Family Nurse Practitioner, he brings a rare integration of primary care and behavioral health — ensuring every resident and patient receives whole-person care.
Ioan "Gio" Cosman
Co-Founder & Operations
Known as Gio, Ioan is the quiet force behind every beautifully finished wall, thoughtfully laid floor, and carefully restored space in the GMC portfolio. Alongside Adrian, he has made the impossible look effortless — most notably turning an old church into one of Scottsdale's most inviting assisted living homes.
From church pews
to a place called home.
The building that is now Serendipity in the Sun II was once a church — a place of gathering, reflection, and community. When Adrian and Gio first walked through its doors, most people saw an old structure past its prime.
They saw something else entirely. With their own hands and an unmatched eye for transformation, they stripped it back and rebuilt it — preserving the warmth and character of the original structure while reimagining every inch as a dignified, beautiful home for Arizona seniors.
“We didn't demolish its history. We honored it.”
Serendipity in the Sun II
10250 N 124th St · Scottsdale, AZ
Our Structure
One enterprise. Four organizations.
Four purpose-built organizations, united under one parent company and one shared vision.
Parent Company
GMC Healthcare Services LLC
Scottsdale, Arizona
What guides us
Our Core Values
These principles guide every decision, every interaction, and every service we provide.
Compassion First
Every interaction is guided by genuine empathy — for patients, residents, families, and students alike.
Clinical Excellence
Evidence-based practices, continuous education, and rigorous standards drive everything we do.
Family & Community
We treat every person we serve as part of our extended family, because healthcare is deeply personal.
Education & Growth
We invest in the healthcare workforce of tomorrow through training, mentorship, and certification programs.
Integrity & Accountability
Transparency and ethical conduct are non-negotiable in every corner of our enterprise.
Whole-Person Wellness
Physical, mental, and emotional health are inseparable — our services address all dimensions of well-being.
Ready to experience the GMC Health difference?
Whether you're seeking care for a loved one, looking for a trusted provider, or beginning a healthcare career — we're here to help.