OhioHealth

athenahealth builds the digital infrastructure that powers modern healthcare. Since 1997, the company has delivered cloud-based technology that simplifies administrative complexity, enabling medical practices to focus on patient care rather than paperwork. The flagship athenaOne platform integrates electronic health records, practice management, revenue cycle management, and patient engagement tools into a single AI-native solution that connects over 170,000 providers serving more than 20% of the U.S. population. Through a network that processes over 315 million claims annually, athenahealth leverages machine learning and automation to reduce administrative burden, improve financial performance, and enhance clinical outcomes. The company's platform serves practices of all sizes - from independent startups to large health systems - across dozens of medical specialties. Recognized consistently as Best in KLAS and named to Built In's Best Places to Work lists, athenahealth continues to expand its capabilities in AI-powered documentation, interoperability, and data-driven insights to transform how healthcare is delivered and experienced.

OU Health operates Oklahoma's only comprehensive academic health system, serving patients across all 77 counties through a distributed network of hospitals, clinics, and specialized treatment centers. With more than 10,000 team members - including 1,300 physicians and 4,000 nurses - the organization functions as the flagship academic health system of The University of Oklahoma, integrating direct patient care with medical education and clinical research. The infrastructure includes Oklahoma Children's Hospital, the Stephenson Cancer Center (one of only 73 NCI-Designated Cancer Centers nationally), the Harold Hamm Diabetes Center, and a Level I trauma center that has anchored emergency care in the state for three decades. The organization's operational footprint extends from Oklahoma City and Edmond to Tulsa and points beyond, delivering complex, life-saving treatments that range from pediatric heart transplants to advanced oncology protocols. The clinical environment combines acute trauma response, specialized pediatric services, diabetes management, and cancer treatment under a single institutional umbrella. This structure creates a threat surface that spans emergency department systems, research data repositories, pediatric patient records, transplant coordination networks, and the interconnected clinical systems that support continuous care across multiple counties. For security practitioners, OU Health represents the operational complexity of a large-scale academic medical center: protecting high-value research data, maintaining uptime for life-critical systems, ensuring HIPAA compliance across geographically distributed care sites, and securing the digital infrastructure that supports both routine outpatient visits and emergency trauma operations. The scale - measured in thousands of clinical staff, tens of thousands of patients, and statewide geographic reach - translates to challenging identity management, network segmentation, medical device security, and incident response coordination across entities that include teaching hospitals, research facilities, and community clinics operating under unified governance.

Emory Healthcare operates 11 hospitals and a clinically integrated network serving 26,000 employees across Georgia - which means the attack surface is sprawling. The threat model here is healthcare-standard: HIPAA compliance, ransomware targeting clinical systems, and the operational risk of downtime in environments where EHR access, imaging systems, and connected medical devices directly impact patient outcomes. With 3,800 physicians and over 50 specialty areas generating protected health information at scale, data segmentation and access control aren't theoretical - they're daily operational requirements. The security function supports both clinical operations and the research side of an academic health system tied to Emory University. That dual mandate means protecting patient data while enabling collaboration across research networks, which introduces federation and data-sharing complexity. The infrastructure spans legacy hospital IT, modern cloud services for analytics, and operational technology in clinical settings - ventilators, infusion pumps, imaging equipment - all of which require different threat modeling than standard enterprise environments. Established in 1997 and expanded through the Emory Healthcare Network since 2011, the organization has been consolidating what were once independent hospitals into a unified system. That history suggests ongoing integration work: harmonizing security policies, centralizing identity management, and standardizing tooling across acquisitions. The scale and regulatory environment demand mature incident response, vulnerability management across heterogeneous systems, and the ability to operate under the assumption that you're a target.

Ramsay Health Care is Australia's largest private hospital operator, delivering world-class healthcare since 1964. Founded by Paul Ramsay AO, the company has grown from a single psychiatric facility to a multinational network operating more than 70 hospitals, day surgeries, clinics and surgical centres across Australia, with additional operations in Europe and the United Kingdom. Each year, more than one million Australians trust Ramsay with their health, supported by a workforce of over 34,000 dedicated professionals who embody 'The Ramsay Way' - a philosophy of people caring for people that prioritizes clinical excellence, compassion, and putting patients first. The organization provides comprehensive medical services spanning acute care, surgical procedures, maternity, mental health, rehabilitation, and allied health. Ramsay operates facilities in urban and regional communities, ensuring accessible high-quality care nationwide. Beyond hospital walls, Ramsay Home Health delivers multidisciplinary community and home-based care, while Ramsay Health Plus provides rehabilitation and wellness services. The company invests significantly in research, clinical trials, and innovation, collaborating with specialists through Communities of Practice in cancer, orthopaedics, cardiology and mental health. This commitment to advancement, combined with sustainable growth practices under the Ramsay Cares initiative, positions Ramsay as a leader in private healthcare delivery both domestically and internationally.

Cleveland Clinic operates over 300 clinical facilities across six countries, processing protected health information for tens of millions of patient encounters annually. The attack surface spans legacy hospital systems, research networks, IoT medical devices, and patient-facing digital platforms including Epic MyChart deployments. With 48,000 employees across healthcare delivery, research, and education operations, the threat model includes ransomware targeting clinical operations, supply chain attacks on medical device firmware, and credential theft across federated identity systems spanning Ohio to Abu Dhabi. The security organization defends a hybrid environment where uptime directly impacts patient safety - electronic medical records can't go offline, imaging systems must remain available during procedures, and research data handling must satisfy HIPAA, GDPR, and international equivalents simultaneously. The infrastructure includes on-premises data centers supporting clinical operations, cloud environments for research collaboration, and air-gapped networks for sensitive studies. Northeast Ohio's largest private employer, the organization has been expanding its digital footprint since 1921, meaning security teams inherit decades of technical debt alongside modern cloud architecture. Security work here means securing clinical IoT at scale, implementing zero-trust architectures across international jurisdictions, and building detection capabilities that account for legitimate 3 a.m. database queries from oncology researchers versus actual exfiltration. The operational reality involves coordinating incident response across time zones, managing vendor risk for medical device manufacturers, and architecting controls that don't break clinical workflows during trauma cases.

Northwell Health operates as New York State's largest healthcare provider and private employer, running 28 hospitals and more than 1,000 outpatient facilities across the state. Founded in 1997 through the merger of North Shore Health System and Long Island Jewish Medical Center, the organization now employs over 104,000 team members and treats more than 2 million patients annually. The scale of operations spans clinical care, hospital operations, outpatient services, oncology, cardiovascular medicine, medical education, and research - creating a substantial digital attack surface that requires protecting patient data, medical devices, hospital networks, and research systems across a geographically distributed footprint. The organization's technical infrastructure supports both acute-care hospital operations and a vast ambulatory network delivering non-inpatient clinical services. This dual environment presents distinct security challenges: real-time clinical systems where availability is critical, electronic health records systems handling sensitive patient information at scale, medical IoT devices integrated across facilities, and research data requiring protection while enabling collaboration. The threat model includes ransomware targeting hospital operations, patient data exfiltration, medical device vulnerabilities, insider threats across a workforce exceeding 100,000, and supply chain risks inherent in healthcare technology ecosystems. As a nonprofit integrated healthcare network with explicit commitments to community health access and medical innovation, Northwell's security posture must balance robust protection with operational realities of healthcare delivery. The organization's focus on advancing medical education and research adds complexity around academic partnerships, data sharing protocols, and protecting intellectual property. Security teams operate within regulatory frameworks including HIPAA and state privacy laws while supporting clinical workflows that cannot tolerate the downtime or friction common in other industries.