Organizational Excellence Team

The OE team of professionals is dedicated to helping leaders and leadership teams create thriving, sustainable organizations.

Our consultants bring decades of experience, advanced degrees and advanced training in organizational effectiveness, change management, and executive leadership coaching & development to co-create approaches that meet the unique development needs of each of our clients. We are all lifelong learners, consistently seeking out opportunities for ongoing development in service of our clients. Learn more about what drives our work

Mark Wedell, MSOD, PCC, SPHR, SHRM-SCP

  • Director, Organizational Excellence and WorkLife
  • Organizational Excellence
Mark is an accomplished Executive Leadership Coach and leadership development professional. He brings more than 25 years of successful organizational leadership, coaching, performance management, engagement strategies, development and learning management systems, and change management methodologies to transform organizational change to sustain and support growth that leads to employee retention and best place to work awards.

Barrett McBride, PhD, MCC

  • Manager, Organizational Excellence
  • Founder, UCD Coaching Community of Practice
  • Director, UCD Executive Leadership Coaching Program
  • Organizational Excellence
Barrett McBride, PhD, MCC, is a seasoned executive leadership coach, organizational development consultant, and leader. At UC Davis, her current focus includes leading a team of senior consultants and coaches, evoking a servant leadership approach. “This team is composed of creative, multi-talented professionals who are at their best when they are free to use their considerable expertise in partnership with their clients, to create the most effective approach for each client and each engagement,” she says. “I do my best to create an environment for them to do their best.”

Tiffani Francis, CPC

  • Senior Organizational Development Consultant, UC Davis Health
  • Organizational Excellence
Tiffani Francis, CPC, is a Senior Organizational Development Consultant. She has over 20 years of experience in the healthcare management and leadership field. With her experience as an organizational development and leadership coach, Tiffani can relate to the complexities that healthcare leaders navigate while making their vision a reality. Tiffani’s professional interests include developing high-performing teams, leadership effectiveness, performance acceleration, stakeholder engagement, work culture strategy, relationship-centered communication, and change management.

Diane Garga, PhD, PCC

  • Senior Organizational Development Specialist
  • Organizational Excellence
Diane Garga is an accomplished Leadership-Executive Coach and Organization Development Professional with a full range of experience in corporate, higher education, small business, government and non-profit organizations in the U.S. and abroad. She has extensive experience working with corporate, academic and community leaders, small business owners and innovators who are strategizing to enhance their leadership impact, drive innovation and shape effective work cultures and high performing teams. 

Gayle Guest-Brown, MBA, PCC, CPC

  • Senior Organizational Development Specialist
  • Organizational Excellence
Gayle is an accomplished Executive Leadership Coach and leadership development professional. She brings 30 years of successful leadership experience across five sectors of business, corporate, technology, non-profit, ministry, and entrepreneurship.

Dorothy Lingren, MA, PCC

  • Senior Organizational Development Specialist
  • Organizational Excellence
Dorothy Lingren has worked to develop leaders and organizations for the past 30 years through leading change projects in a variety of companies including Sutter Health, Intel Corporation, and E&J Gallo Winery. Her current focus is partnering with leaders to achieve results related to strategic planning, change management, team development, balancing competing priorities, and communication.

Adrienne Mead, MSOD, SPHR

  • Senior Organizational Development Consultant, UC Davis Health
  • Organizational Excellence
Adrienne Mead is a Senior Organizational Excellence Consultant. Her work over the past fifteen years has been at the intersection of Organization Development, Learning, Change, and Human Resources. Adrienne uses this combined perspective to help teams and organizations achieve their desired realities. Adrienne has special interest and expertise in team performance, change planning, employee engagement, talent management and leadership effectiveness.

Debbie Ramos, BA

  • Administrative Assistant III
  • Organizational Excellence
Debbie is a highly skilled Administrative Assistant providing high level administrative, operational, planning, and support functions within the Organizational Excellence team. Over her four years with UC Davis, Debbie has worked on numerous change, communication, and training teams and has planned and coordinated logistics large Change Network meetings and town halls, scheduled and produced live and virtual trainings for groups across UC Davis campus and UC Davis Health, and facilitated meetings with executive stakeholders. Debbie brings skills of workshop facilitation, curriculum development, collaboration, excellent communication skills, and enthusiasm to her position at UC Davis.

Vicky Tibbs, MBA, ACC

  • Senior Organizational Development Consultant, UC Davis Health
  • Organizational Excellence
Vicky Tibbs aims to bring authenticity and fulfilment into the workplace, looking forward at possibilities. Bringing the experience of her tenure at UC Davis Health, she enthusiastically partners with clients in strategic planning, team building, change management, increasing employee engagement, and other organizational effectiveness projects.