Over 210 Years of Combined Experience
Over 210 Years of Combined Experience
Spoken with Authority is a values-driven organization.
Our efforts and engagements reflect our unwavering commitment to authenticity, empathy, and diversity.
01
Authenticity
While we use proven and proprietary methods, techniques, and tools in our work, we do not take a generic one-size-fits-all approach. We focus on bringing out each individual professional’s authentic voice and developing their unique strengths — including gifts and talents that they may not realize they have — so they can deliver clear, convincing, and compelling presentations every time: whether they are on stage in front of thousands of peers, in a virtual meeting with clients, or having an important one-on-one conversation with a colleague.
02
Empathy
03
Diversity
We actively embrace and demonstrate diversity throughout our organization, from our own hiring and work-allocation procedures, to our commitment to using inclusive and respectful language and practices in our training programs and coaching engagements. We also help organizations promote and celebrate diversity by upgrading the presentation and public speaking skills of under-represented and historically marginalized groups in their workforce.
Christine Clapp
Founder and President
Lynne Adrine
Presentation Skills Coach
David Henderson
Presentation Skills Coach + Workshop Facilitator
Jean Costanza Miller
Presentation Skills Coach and Workshop Facilitator
Michele Morrissey
Lisa Richard
Presentation Skills Coach
Bjørn Stillion Southard
Presentation Skills Coach and Workshop Facilitator
Amanda Pruden
Meet Our Team

Christine Clapp
Founder & President
In 2008, Christine Clapp founded Spoken with Authority, a Washington, D.C.-based leadership communication and presentation skills consultancy that elevates the presence and expands the influence of professionals, and promotes inclusion in their organizations. Since then, Christine and her diverse team of presentation skills experts have provided online and in-person training programs and coaching engagements to hundreds of organizations and thousands of leaders, emerging leaders, and subject-matter experts.
Christine is the co-author of Presenting Now: A Guide to Public Speaking and Leadership Communication Online, in Person, and Beyond (2022), Presenting Virtually: A Guide to Public Speaking in Online Contexts (2020) as well as Presenting at Work: A Guide to Public Speaking in Professional Contexts (2014), and a collaborator on Let ‘Em Speak, a podcast launched in 2020 that explores the intersection of presentation skills and inclusion. She holds two degrees in communication: a bachelor’s degree from Willamette University, and a master’s degree from the University of Maryland, College Park. She also taught public speaking to undergraduate and graduate students at the George Washington University for thirteen years.
MY STORY
As the author of two books on public speaking, an public speaking instructor to college students, and a presentation-skills adviser to thousands of leaders, emerging leaders, and subject matter experts, you might think that I was “presenting before I could walk.”
But the truth is that throughout my childhood and into early adulthood, I dreaded giving presentations. In fact, to avoid the agony of a semester-long public speaking course in college, I chose what I thought was the lesser of two evils: participating in two debate tournaments. Technically, you might say that I had a perfect record over my first dozen debates: 0 wins, 12 losses.
For some people, frustration is the proverbial Mother of Invention. For an over-achiever like me who excelled in just about everything else, disgrace did the parenting duties: because in the aftermath of an especially humiliating defeat, I suddenly realized that my opponents weren’t smarter or better prepared than me. Rather, they had a set of skills that I lacked, and that made ALL the difference: they were articulate, confident, and could present with authority.
Since then, I’ve earned two communication degrees — a bachelor’s from Willamette University, and a master’s from the University of Maryland, College Park. I’ve also served as a communications director on Capitol Hill; taught public speaking to several thousand undergraduate and graduate students; co-authored Presenting Virtually: A Guide to Public Speaking in Online Contexts (2020) and Presenting at Work: A Guide to Public Speaking in Professional Contexts (2014); and started Let ‘Em Speak, a podcast about the risks and rewards of real talk by real people in the real world. Most importantly, in 2008 I launched Spoken with Authority, a presentation skills consultancy that elevates the presence and expands the influence of professionals, and promotes inclusion in their organizations.

Lynne Adrine
Leadership Communication Coach
- Delivering authentic communication
- Spoken, written, and visual communication
- Public presentation
- Media interviews and off-the-cuff speaking
Lynne is passionate about building an alliance with her clients, and working together towards greater balance, elevated performance, and expanded opportunities.
Lynne has more than 30 years of experience as a broadcast journalist and senior producer with multiple television networks, including CNN, PBS Newshour, NBC News, CBS News and ABC News. She also serves as the director of a graduate program in broadcast and digital journalism for the Newhouse School at Syracuse University. She serves on the board of directors of Journal-isms Inc., a nonprofit corporation supporting diversity issues in U.S. news media. She also sits on the advisory boards for the Freedom Forum’s Power Shift Project and The Press Forward, organization dedicated to civility, inclusion and equity in newsrooms and other work environments.
Lynne has a bachelor’s degree in broadcast journalism from Boston University, and went on to graduate work in Broadcast Journalism at the Medill School of Journalism at Northwestern University. She also holds certification in training in journalism ethics and coverage of race relations from the Poynter Institute for Media Studies in St. Petersburg, Florida and certification in executive leadership coaching from the Georgetown University Center for Professional Development.
“I believe in supporting people in sharing information – their personal truth and knowledge – to audiences in a respectful presentation which enhances understanding.”

David henderson
Leadership Communication Coach and Workshop Facilitator
- Public speaking for lawyers
- Trial advocacy and witness preparation
- Media relations
- Leadership development
- High-stakes presentations
David is passionate about helping ambitious professionals and especially attorneys reach their ultimate goals by strategizing how to be persuasive, engaging, and informative in high-stakes situations. He deeply understands that great ideas must be expressed effectively to have an impact and make a difference.
David has nearly three decades of experience in high-profile communication-based roles, including 20 years as a trial attorney during which he tried over 70 jury cases to a verdict. Previously, he served as an associate at Vinson & Elkins, LLP, an international law firm with approximately 700 lawyers worldwide, and then as a prosecutor in the Special Crimes Division of the Bexar County’s District Attorney’s office. Currently, he serves as a civil rights attorney at Ellwanger Law PLLC, specializing in civil rights, discrimination in the workplace, and fighting for sexual assault survivors. He is also a CNBC contributor who provides legal analysis on The News with Shepard Smith.
Due in large part to his exceptional communication skills, David was invited by the Texas District and County Attorney’s Association (TDCAA) to provide continuing education courses for other attorneys across the state. He also joined Toastmasters International in 2007, and in 2010 he was named World Champion of Public Speaking in a competition of more than 30,000 elite speakers from 113 countries.
As part of his longstanding commitment to ending systemic injustice, David has written op-eds regarding anti-riot laws and qualified immunity, which have been published by the Washington Post and Newsweek. He has also been featured on CNN and MSNBC providing legal analyses of high-profile cases. David holds a B.A. in Plan II Honors from the University of Texas, and a J.D. from the University of Texas School of Law where he serves as an adjunct professor teaching trial skills and coaching mock trial.
“I am inspired and drive to develop, coach, and empower my clients to be persuasive, engaging, and information in front of an audience of any size, and in any situation – from informational gatherings to high-stakes presentations.”

Jean Costanza Miller
Leadership Communication Coach and Workshop Facilitator
- Leadership communication
- Women in leadership
- Argumentation and rhetorical strategy
- Message design
- Education and training
Jean’s passion is collaborating with clients to develop impactful presentations on issues of significance. She focuses on developing genuine engagement with audiences, honing messages for superior clarity and conciseness, and fostering confidence in her clients.
Jean has three decades of experience in higher education and presentation skills training. Currently on the faculty of The George Washington University, she has taught courses in public speaking, leadership, intercultural communication, professional communication, and rhetoric. She has also spent over 25 years as presentation skills instructor for the Capital Speakers Class, a private public speaking course for women, and as consultant to the Capital Speakers Club of Washington, D.C. Inc., a nonprofit organization that promotes understanding through effective communication.
Jean has a doctorate and master’s degree in communication from the University of Maryland, College Park, and a bachelor’s degree in speech communication from Towson University, where she competed in debate, was a national finalist in public speaking competition, and was the commencement speaker for her graduating class.
“My goal is to help clients anticipate their speaking engagements with calm confidence, knowing that they can make a genuine connection with any audience.”

Michele Morrissey
Leadership Communication Coach and Workshop Facilitator
- Interpersonal communication and difficult conversations
- Effective use of voice, vocal health, and accent expansion
- Non-verbal communication
- Supporting professionals with learning differences
Michele is passionate about helping her clients uncover and navigate complex interpersonal dynamics, which is accomplished when they use research-based methods to understand their personality and motivations, as well as their communication partners and audiences. The result is delivering messages of impact and influence.
Michele has over two decades of experience as an educational and corporate speech-language pathologist, and has collaborated with educators, executives, and industry leaders to develop their own communication styles and voices infused with intentionality and influence. Michele’s areas of expertise also include interpersonal skills and social communication. Her approach focuses on the primary purposes of communication -to connect, relate, and influence- and how clients can maximize their impact through increasing self-awareness and social awareness.
She earned a master’s degree in speech-language pathology from the University of Pittsburgh, and a bachelor’s degree in communication sciences and disorders from Hampton University. She is also a P-ESL certified accent expansion trainer, and holds a Certificate of Clinical Competence from the American Speech-Language Hearing Association.
“I ensure that my clients are equipped with core competencies in self-awareness and interpersonal communications, which facilitates their ability to relate, connect, and influence across settings and situations.”

Lisa Richard
Leadership Communication Coach
Areas of Interest Include:
- Enhancing professionalism through effective communication
- Formal and informal public speaking
- Audience analysis and critical thinking
- Pronunciation and accent expansion
- Interpersonal communication and influence
Lisa is driven by a desire to make a difference in her clients’ lives and careers by helping them unlock their potential to communicate effectively. She believes skilled communicators hold the key to connecting with others and exercising positive influence in the world around them.
Lisa has more than 25 years of professional experience teaching communication skills to corporate, government and non-profit clients, including non-native speakers of English. She has also developed and delivered comprehensive communication skills training courses for leadership development programs, performance evaluation programs, and teams undergoing institutional change. Lisa particularly enjoys one-on-one engagements with clients who want to refine the impact and professionalism of their spoken communication.
Lisa holds a bachelor’s degree in French from the University of Denver and a master’s degree in teaching from the School for International Training.
“I am committed to helping each client speak with an authentic voice, polish a professional delivery, and craft presentations that meet the audience’s needs and achieve the presenter’s goals.”

Bjørn Stillion Southard
Leadership Communication Coach and Workshop Facilitator
- Public speaking and keynote presentations
- Pitches and high-stakes presentations
- Field-specific communication
- Speaker brand development
Bjørn is inspired by helping clients realize that they have something compelling to share with an audience. He is the co-author (with Spoken with Authority’s founder Christine Clapp) of Presenting Now: A Guide to Public Speaking and Leadership Communication Online, in Person, and Beyond (2022), Presenting Virtually: A Guide to Public Speaking in Online Contexts (2020) as well as Presenting at Work: A Guide to Public Speaking in Professional Contexts (2014), and a collaborator on Let ‘Em Speak, a podcast launched in 2020 that explores the intersection of presentation skills and inclusion.
Bjørn has two decades of experience delivering public speaking instruction and seminars across the country. He has developed numerous presentation skills development programs, for both individuals and small groups, and for short and long-term engagements. Bjørn has a doctorate and master’s degree in communication from the University of Maryland, College Park, and a bachelor’s degree in rhetoric and media studies from Willamette University.
Bjørn is also author of the award-winning academic book Peculiar Rhetoric: Slavery, Freedom, and the African Colonization Movement, and numerous articles about the history of public address in the United States. He is an Associate Professor of Communication Studies at the University of Georgia.
“Confidence comes from preparation, practice, performance, and reflection. My goal is to partner with speakers to do the work to gain that confidence.”

Amanda Pruden
Business Manager
Amanda spent over 13 years working at large corporations in a variety of roles that focused on project management, business analysis, and team effectiveness. At Spoken with Authority, she oversees operations and marketing, as well as focuses on client care. Amanda studied project management at Mount Royal University and leadership at the University of Calgary.
Our Books
Spoken with Authority team members Christine Clapp and Bjørn Stillion Southard have co-authored three books on workplace communication and presentation skills with insightful, practical, and immediately useful tools, strategies, and advice for your confidence and influence to grow.


Our Books
Spoken with Authority team members Christine Clapp and Bjørn Stillion Southard have co-authored three books on workplace communication and presentation skills with insightful, practical, and immediately useful tools, strategies, and advice for your confidence and influence to grow.


Let ‘Em Speak Podcast
Spoken with Authority team members Christine Clapp, David Henderson, and Bjørn Stillion Southard are collaborators on the Let ‘Em Speak podcast, which explores the intersection of presentations skills / public speaking and diversity / inclusion. It’s about the risks and rewards of real talk, by real people, in the real world.