About Us

Mr. Jakubcanin brings over 15 years of healthcare executive leadership experience in long-term acute care, inpatient rehabilitation, home health care, personal care services, hospice, and medical home care. Mr. Jakubcanin joins Cornerstone from AccentCare where he served as Chief Operating Officer. Prior to AccentCare, he served as Senior Vice President of Kindred Healthcare’s Central Region. Overall, he served 13 years at Kindred Healthcare with increasing levels of responsibility. Mr. Jakubcanin is a trained Pharmacist with a Bachelor’s Degree in Pharmacy and an MBA from Wayne State University.

Mr. Schultz has over 20 years’ of executive healthcare financial leadership experience in long-term acute care, inpatient rehabilitation, behavioral health and acute care. Prior to joining Cornerstone, Mr. Schultz served in Division and Regional CFO roles with Psychiatric Solutions/Universal Health Services. Prior to this, he held executive positions, including the Vice President of Finance (Midwest Region), with Kindred Healthcare. Mr. Schultz holds a Bachelor of Arts in Accounting from St. Xavier University and is a Certified Public Accountant.

Ms. Boney has over twenty five years of healthcare leadership experience in a post-acute setting including LTAC, rehab and home health specialties. Ms. Boney brings a wealth of knowledge from her prior senior leadership roles in sales and development. She has served as Senior Vice President for Community Hospitals Corporation and Vice President of Development for Kessler Institute/Select Medical. Ms. Boney attended the University of Cincinnati. She has demonstrated expertise in developing, implementing and evaluating marketing objectives for sustainable growth and turnaround strategies to improve healthcare facility operational and financial performance.​

Ms. Davis is a dynamic healthcare leader with over seventeen years of specialized experience in Case Management. As Vice President of Case Management, Ms. Davis will have complete oversight of the day to day operations of the Case Management programs for a portfolio of hospitals. She will lead Cornerstone’s ongoing case management strategy and will track Case Management data, noting trends, and identify improvement opportunities. Prior to joining Cornerstone, Ms. Davis served as Vice President of Case Management for Acuity Healthcare. She holds an MBA in Healthcare Administration from South University and a Bachelor’s in Healthcare Administration from the University of Northwestern Ohio. She is an active member of Case Management Society of America (CMSA) and the American Case Management Association (ACMA).

Ms. Feasel has over 25 years of healthcare experience in long-term acute care, inpatient and outpatient rehabilitation, as well as home health. Ms. Feasel held several senior and executive level positions within her 25 years with her most recent executive leadership role at Kindred Healthcare as a Vice President of their LTAC Hospital Division. Overall, she served Kindred Healthcare for 20 years with increasing levels of responsibility from Director of Rehabilitation to Chief Operating Officer, Chief Executive Officer as well as Market CEO for the Hospital Division and Vice President of their Rehab Division. Ms. Feasel holds a Bachelor’s of Science degree in Physical Therapy from the University of North Dakota and a Master’s of Business Administration degree from St. Leo University in Florida.

Keith brings over 30 years of leadership experience managing hospitals and treatment centers across the United States. His leadership experience includes capabilities in both adult and adolescent treatment settings including residential and inpatient hospitalization. He most recently served as the CEO for Rock Springs Behavioral Health Hospital in Georgetown, Texas which included three separate behavioral health treatment centers. Keith also held executive leadership roles with Tenet and Acadia Healthcare. While serving as CEO at Abilene Behavioral Health hospital in 2009, his facility was named as Acadia Healthcare’s Facility of the Year award. His passion for behavioral health was enabled some years ago when he served as a Correctional Officer, Counselor and Dormitory Manager of an Adult Alcohol and Substance Abuse Unit, operated by the State of New York. Keith holds both an M.A. degree in Educational Psychology and a B.S. degree in Sociology from State University of New York.

Ms. Lewis brings over 20 years of experience to her executive clinical leadership role with Cornerstone. Ms. Lewis’ professional experience includes executive leadership roles in short – and long-term acute care, as well as rehabilitation hospitals. Prior to joining Cornerstone, she served as the Vice President of Clinical and Quality Services for Acuity Healthcare and had previously served as a Regional Chief Nursing Officer for HealthSouth. Ms. Lewis is a Registered Nurse with a Master of Nursing Administration and a Master of Healthcare Administration from the University of Texas at Arlington, as well as a Bachelor of Science in Nursing from Mid-Western State University. She is a Board Certified Nurse Executive and a Certified Professional in Healthcare Quality.

Mr. McDonough brings over 20 years’ experience in the practice of healthcare law and regulations. Prior to joining Cornerstone, his experience included legal roles supporting a range of healthcare providers, including acute care hospitals, rehabilitation hospitals, skilled nursing, assisted living, independent living, home health and hospice. Mr. McDonough is licensed to practice law in Arkansas, Oklahoma and Missouri. He received his J.D. from The University of Tulsa and graduated from Brigham Young University with a Bachelor of Arts in Political Science.​

Mr. O’Sullivan, FACHE, has over 20 years’ experience in healthcare administration, holding senior leadership positions spanning across physician group practice management, short-term acute care regional health systems and long-term acute care regional operations. His career included over 12 years in the West Virginia Air National Guard as both an Enlisted Airman and an Officer. After working for Coastal Carolinas Health Alliance, he joined Regency Hospital Company and served as Chief Executive Officer in Mississippi and Georgia hospitals. He transitioned his career to LifeCare Management Services and oversaw hospital operations in Nevada, Idaho and Colorado. Mr. O’Sullivan earned a doctorate in Healthcare Administration from Central Michigan University, a Master of Healthcare Management from Marshall University and an undergraduate degree from Concord College.

Leslie Vajner joined Cornerstone in February of 2017 as the Vice President of Strategic Partnerships. Leslie brings more than 20 years of health care experience as a clinician, consultant, and executive leader with a passion for business development, relationship management, innovation, patient safety, and quality of care. Prior to joining Cornerstone, she functioned as the Administrative Director, Center for Connected Care overseeing The Cleveland Clinic’s post-acute assets and strategy including home care, hospice, and physician practice management,. This work helped to support several CMS, Center for Medicare & Medicaid Innovation initiatives including bundled payments, ACO and Independence at Home. At Kindred, she served in various clinical operations and business development leadership roles including as Sr. Director of Care Management and Clinical Integration, Chief Clinical Officer and District Director of Clinical Integration and Business Development. Leslie began her healthcare career as a registered nurse specializing in Critical Care, Catheterization Lab, Telemetry and Emergency Care. She earned her Bachelor of Science in Nursing from Case Western Reserve University and her Master of Health Administration from The Ohio State University. She has written and presented various healthcare guides and publications related to Post-Acute and Long-term Care.

Since 2015, Mr. Walker has shared his strategic expertise with Cornerstone Healthcare Group. In addition to his role at Cornerstone, Mr. Walker serves as Managing Director with the Healthcare Private Equity group at Highland Capital Management. Mr. Walker brings 25 years of experience in strategy and operational roles across a variety of industries and functions. Prior to joining Cornerstone and Highland, Mr. Walker served as a Sr. Vice President at HealthMarkets (now part of UnitedHealthcare), where he focused on strategic partnerships, product development, sales force infrastructure, and strategy. Previously, Mr. Walker worked as a Vice President of Customer Management Operations at Capital One, where he held various operational and internal consulting roles, and as an Associate Principal at McKinsey & Company. Mr. Walker holds an MBA from The Wharton School of the University of Pennsylvania and a BSEE from Southern Methodist University.