J

John Knox Singleton's
email & phone

Current Position:

Owner at Twenty-first Century Health

Experience:

53 years

Location:

Winchester, Virginia, United States

How to contact John Knox Singleton

email**@gmail.com
phone+1-***-***-4310
LinkedIn

Work Experience

Owner at Twenty-first Century Health

Jul 2018 - Current

Former Interim CEO at Opportunity Scholars

May 2025 - Jun 2025

CEO at Inova Health

Jul 1983 - Jun 2018

Hospital Director at Milton S. Hershey Medical Center of the Pa State University

Jul 1975 - Aug 1983

Senior Administrative Assistant at British National Health Service

May 1973 - Jul 1975

John Knox Singleton started working in 1973, then the employee has changed 4 companies and 4 jobs. On average, John Knox Singleton works for one company for 10 years 7 months.

Education

Master's of Health Administration at Duke University

Bachelors of Science at University of North Carolina at Chapel Hill

no degree earned at Maryville College

Frequently Asked Questions

What is John Knox Singleton's minimum period of employment in the companies?

John Knox Singleton's minimum period of employment in various companies is 1 month.

What is John Knox Singleton's average duration of employment for different companies?

On average, John Knox Singleton works for one company for 11 years 4 months

What industries has John Knox Singleton worked in?

John Knox Singleton worked in the Nonprofit Organization Management, and Hospital & Health Care.

What positions has John Knox Singleton held before?

Previously, John Knox Singleton worked as a Former Interim CEO, and CEO, and Hospital Director, and Senior Administrative Assistant.

How do I contact John Knox Singleton?

John Knox Singleton's email address is **@gmail.com, phone number is +1-***-***-4310. Sign up to get contact details.

Who are John Knox Singleton's peers at other companies?

John Knox Singleton's peers at other companies are Mark Leroux and Brittain Bost and Mae Salinas
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John Knox Singleton Namesakes

Name
Company
Position
J
Greenbrae Management, Inc.
Purchasing Coordinator
J
Maintenance Coordinator

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