Skip to main content
Fairfax County, Virginia
Fairfax County Virginia
Fairfax County Virginia

FFX Global Navigation

    • Department Homepage
    • About the Health Department
      • About Us
      • Frequently Asked Questions
      • Career Opportunities
      • Contact Us
    • Department Divisions
      • Emergency Preparedness & Response
      • Environmental Health
      • Laboratory Services
      • School Health
    • Health Department Services
    • Health Department Programs
      • Disease Carrying Insects - Fight the Bite
      • Homeless Healthcare Program
      • Public Health Youth Ambassadors
      • Stable Families, Thriving Futures
      • Strengthening Antimicrobial Stewardship
    • Clinic Locations
    • Diseases & Conditions
    • Health Alerts & Advisories
    • News & Events
    • Permits & Health Codes
  • Residents
    • Animals & Pets
      • Adoptions
      • Animal Control & Regulations
      • Guide to Dogs
      • Lost & Found Pets
      • Shelter Support & Supplies
      • Wildlife
      • More
      Courts & Legal
      • Case Information
      • Circuit Court Docket
      • Jury Duty
      • Land Records
      • Magistrate
      • Public Law Library
      • Self-Help Resources
      • Traffic Court
      • Vital Records
      • More
      Environment & Energy
      • Invasive Species
      • Litter
      • Recycle, Trash & Compost
      • Sustain Fairfax
      • Trees
      • Watersheds
      • More
      Health & Human Services
      • Basic Needs & Assistance
      • Disability Services
      • Diseases & Conditions
      • Domestic & Sexual Violence
      • Health Clinics
      • Mental Health
      • Opioids
      • More
      Individuals & Families
      • Children & Youth
      • Federal Workforce
      • Immigrants
      • Military & Veterans
      • New Residents
      • Older Adults
      • Parents
      • People with Disabilities
      • Volunteers
      • More
      Land Use & Planning
      • Comprehensive Plan
      • County Capital Projects
      • Land Records
      • Parks Planning
      • Planning Projects
      • Research Tools
      • Transportation Projects
      • Urban Centers
      • More
      Library & Education
      • Adult Education
      • Early Childhood Programs
      • Library Branches
      • Library Catalog Search
      • Public Schools
      • More
      Parks & Recreation
      • Arts
      • Athletic Fields
      • Camps
      • Community Centers
      • Parktakes Classes
      • Rec Centers
      • Senior Centers
      • Teen Centers
      • Trails
      • More
      Permits & Licenses
      • Birth & Death Certificates
      • Building
      • Child Care
      • Dogs
      • Health
      • Marriage
      • Park Use
      • Solicitors
      • More
      Property & Housing
      • Affordable Housing
      • Code & Zoning
      • Neighborhoods
      • Real Estate Values
      • Recycling & Trash
      • Tenant Landlord Issues
      • Utilities
      • More
      Public Safety & Emergencies
      • 9-1-1
      • Emergency Preparedness
      • Fire & Rescue
      • Gun Violence Prevention
      • Police
      • Scams
      • Sheriff
      • Storm Center
      • More
      Roads & Commuting
      • Bike & Walk
      • Connector Bus
      • Metrobus & Metrorail
      • Park & Ride
      • Pedestrian Safety
      • Road Maintenance/VDOT
      • Street Parking
      • Toll Roads
      • Transportation Projects
      • More
      Taxes & Fees
      • Car Taxes
      • Park Fees
      • Real Estate Taxes
      • Tax Relief
      • Trash Disposal Fees
      • More
      Voting & Elections
      • Absentee Voting
      • Early Voting
      • Election Results
      • Polling Places
      • Voter Registration
      • More
      Weather & Climate
      • Air Quality
      • Climate Action Dashboard
      • Extreme Heat
      • Floods
      • Ready Fairfax
      • Resilient Fairfax
      • Snow
      • Tornadoes
      • More
  • Business
    • Business & Construction
      • Building Permits
      • Code & Zoning
      • Land Use
      • More
      Business Services
      • Business Emergency Preparedness
      • Business Taxes
      • Consumer Services
      • Employer Transportation Service
      • Green Business Partners Program
      • Home-Based Business
      • Regulation & Licensing
      • Small Business
      • Starting a Business
      • Workplace Issues
      • More
      Doing Business with Fairfax
      • Contracting and Procurement
      • Current Solicitations
      • Permits
      • Vendor Pitch Portal
      • More
  • Government
    • About
      • Codes & Standards
      • Countywide Strategic Plan
      • Facilities & Locations
      • History of Fairfax County
      • Operating Status
      • More
      Board of Supervisors
      • Auditor
      • Board Members
      • Boards, Authorities & Commissions
      • Clerk Services
      • Committees
      • Meetings & Agendas
      • More
      Budget & Finance
      • Bonds
      • Budget
      • Financial Transparency
      • Unclaimed Money
      • More
      Departments & Agencies
      Jobs & Employment
      • Full-Time Openings
      • Internships
      • Seasonal & Non-Merit
      Maps & Data
      • Countywide Data Analytics
      • Demographics
      • Geographic Information Systems
      • Interactive Data Tools
      • More
      One Fairfax
      • Digital Equity
      • Inclusive Engagement
      • Trust Policy
  • Fairfax County Virginia
  • Services
    • Find
      • Animal Services
      • Health Clinics
      • Jobs
      • Library Resources
      • Lost or Found Pet
      • Mental Health Support
      • Park Classes
      • Real Estate Values
      • Recycling & Trash
      • Volunteer Opportunities
      • More
      Pay
      • Business Taxes
      • Car Taxes
      • Dog Licenses
      • Driving & Parking Fines
      • False Alarm Fees
      • Real Estate/Property Taxes
      • SACC Payments
      • More
      Register/Apply
      • Basic Needs & Assistance
      • Building Inspections
      • Car Registration
      • Fairfax Alerts
      • Permits & Licenses
      • Tax Relief
      • Vote
      • More
      Report
      • Animal Control Issues
      • Consumer Complaints
      • Crime
      • Domestic Violence
      • Financial Crimes
      • Neighborhood Complaints
      • Road Issues to VDOT
      • Street Light Outages
      • More
  • Connect
    • Alerts, Emails & Apps
      • Email Subscriptions
      • Fairfax Alerts
      • Mobile App
      • More
      Community Engagement
      • Surveys & Projects
      Contact
      • Directory
      • Hotlines & Emergency Numbers
      • VDOT
      • VFOIA Requests
      • More
      News & Events
      • Daily Headlines
      • Emergency Information Blog
      • Events Calendar
      • NewsCenter
      • NotiCentro (Spanish)
      • Public Meetings Calendar
      • More
      Social Media
      • Comments Policy
      • Directory of Accounts
      • More
      TV, Video & Podcasts
      • Channel 16
      • Podcasts & Radio
      • YouTube
      • More
  • TRANSLATE
    • Language Selection

      To change the language of this website, click the drop-down list and select the desired language. The Fairfax County Web site is being translated through "machine translation" powered by Google Translate. Disclaimer

Health Department

  1. Home
  2. Health
  3. Profiles in Public Heath: Mark O'Neil's Commitment to LGBTQ+ Community Health

Health Department Alert:

CONTACT INFORMATION: Our administration office at 10777 Main Street in Fairfax is open during regular business hours 8 a.m. - 4:30 p.m., Monday - Friday. Clinic services are not offered at this location.
703-246-2411 TTY 711
health@fairfaxcounty.gov
10777 Main Street
Fairfax, VA 22030
Gloria Addo-Ayensu, M.D., M.P.H.
Director of Health

Department Resources

  • Department Homepage
  • About the Health Department
    • About Us
    • Frequently Asked Questions
    • Career Opportunities
    • Contact Us
  • Department Divisions
    • Emergency Preparedness & Response
    • Environmental Health
    • Laboratory Services
    • School Health
  • Health Department Services
  • Health Department Programs
    • Disease Carrying Insects - Fight the Bite
    • Homeless Healthcare Program
    • Public Health Youth Ambassadors
    • Stable Families, Thriving Futures
    • Strengthening Antimicrobial Stewardship
  • Clinic Locations
  • Diseases & Conditions
  • Health Alerts & Advisories
  • News & Events
  • Permits & Health Codes

Profiles in Public Heath: Mark O'Neil's Commitment to LGBTQ+ Community Health

June 23, 2025

 

head and shoulders profile photo of Mark O'NeilAs Pride Month fills the air with celebration and advocacy, it's a timely moment to recognize those who work tirelessly year-round to improve the health and well-being of the LGBTQ+ community. Among them is Mark O'Neil, a Community Health Specialist for the Health Department, whose work focuses on developing relationships with the LGBTQ+ community in Fairfax County.

Mark's journey into public health was a natural evolution of his passion for community. "Community health feels natural to me, but I wasn’t aware that it could be a career until after I started working for an LGBTQ+ youth program," he explains. His early experiences as an AmeriCorps service member in an LGBTQ+ youth program in Wisconsin, followed by statewide population health work and HIV/STI care navigation in San Francisco and Sonoma County California, laid the foundation for his current role. He joined the Fairfax County Health Department in October 2024.

At its core, Mark describes the role of a community health specialist as a "partner to the communities we serve." This involves offering health education, connecting individuals to vital resources, and building community capacity. For Mark, this translates into actively engaging the LGBTQ+ community in Fairfax County and Northern Virginia, fostering "lasting and authentic relationships with community leaders as well as agencies and programs that serve the LGBTQ+ community."

Mark O'Neil staffs an exhibit table
Mark O'Neil staffs an exhibit table at the Mosaic District's Pride event.

What truly drives Mark is the profound impact of his work. "I’m passionate about engaging with communities to show them that they are being seen, heard, and celebrated," he shares. This passion was vividly illustrated during recent local Pride celebrations. "I’m still basking in the gratitude that was given for being present," he recounts. He witnessed firsthand the relief and joy on young people's faces as they shared their thoughts on LGBTQ+ health issues. "Adolescence is a rough time for many and adding the layer of queerness to that can make it even more turbulent. By acknowledging that LGBTQ+ young people have a place to belong and be healthy in Fairfax County makes a difference."

Mark believes a critical challenge facing public health today is addressing the social determinants of health that fuel disparities among vulnerable communities. He advocates for a robust and well-funded public health infrastructure that genuinely engages these communities. His personal history deeply informs this conviction: "I’m part of a population that lost a full generation of people to AIDS. The initial response to that crisis was marked by slow, inadequate, and often dismissive action that preyed upon the community’s vulnerabilities rather than addressing root causes." For Mark, this historical context underscores the vital importance of his current work, ensuring that such failures are not repeated.

His biggest accomplishment, he states, is being "an out, gay man who shows up to work as my authentic self and can leverage that knowledge and experience to think strategically of the LGBTQ+ community." However, this authenticity also presents his biggest challenge: "it is particularly challenging to think well of your community in a climate where it is under attack and that parts of it are being systemically erased." Yet, he draws strength from this, reminding himself of his privilege and utilizing opportunities to amplify LGBTQ+ voices.

For those considering a career in public health, Mark offers simple yet profound advice: "As with any career choice, you need to be passionate about your work. Find what makes you happy, but I would also encourage you to try new things to refine that passion." He points to his own unexpected foray into maternal child health, initially outside his HIV/STI focus, as an example of how embracing new challenges can lead to unforeseen professional joys.


While Pride Month is a significant time for visibility and celebration, Mark O'Neil's work is a powerful reminder that the fight for equitable health and genuine belonging for the LGBTQ+ community is a continuous, year-round endeavor, built on authentic relationships and unwavering dedication. 

During Pride Month, the Fairfax County Health Department encourages all residents to take pride in their health and wellness. Taking pride in your health means making decisions that benefit not only yourself but also your family, loved ones, and greater community.

Recent Interactions

    Ask Fairfax

    Terms & Conditions
    Live chat available Search our site
    • Translate
    • Awards
    • Site Feedback
    • PRIVACY POLICY & COPYRIGHT
    Main Address

    12000 Government Center Pkwy
    Fairfax, VA 22035

    Phone

    703-324-7329

    TTY 711

    Site Tools
    • Website Accessibility
    • Translate
    • Download Mobile App
    Support
    • ADA Accessibility
    • FOIA Requests
    • Website Administrator
    Additional Resources
    • Fairfax County Public Schools
    • Economic Development Authority
    • Visit Fairfax
    • Council of Governments
    • Commonwealth of Virginia
    • USA.gov
    • Calendar
    • Channel 16
    • Mail
    • Security
    • WIFI
    • Facebook
    • Twitter
    • Instagram
    • YouTube
    • Mobile

    The Official Site of Fairfax County