Who we are

At One and All Conflict Coaching and Mediation, we are dedicated to helping individuals and businesses navigate conflict in healthy, constructive ways. We understand that conflict is a natural part of life, but when left unresolved, it can lead to frustration, division, and missed opportunities. That’s why we offer expert mediation services designed to empower our clients to address disagreements with understanding, empathy, and effective communication. Whether you’re facing a personal dispute, workplace tension, or challenges within your organization, we provide the tools and resources necessary to resolve conflicts and restore relationships.

Passionate about supporting our local community, we aim to create lasting, positive change by making conflict resolution more accessible to those who need it most. Our approach is centered on creating collaborative solutions that preserve relationships and promote growth. Through coaching and tailored mediation sessions, we help individuals, teams, and organizations strengthen their communication skills, build trust, and develop strategies to manage future conflicts. At One and All Conflict Coaching and Mediation, we believe that when people understand how to resolve differences with respect and cooperation, they can work together to achieve greater success and harmony.


One and All Conflict Coaching and Mediation was founded by professional mediator, ombud, policy advocate, and educator Bri Sullivan.

Bri began her mediation work at the DC State Board of Education, where she mediated conflicts within the DC Public School system, addressing matters related to truancy, bullying, safety, and special education. Driven by a desire to support the greater DC community, she founded her mediation practice to offer tailored conflict resolution services that foster understanding and create positive, lasting solutions. With a focus on building healthier communication and stronger relationships, Bri is dedicated to empowering individuals and organizations to resolve conflicts constructively.

Bri Sullivan, M.Ed, NCPM

Founder and CEO

Let the Fun Begin