A distintinctively bold, and innovative negotiation consulting, and training firm has developed a negotiating framework that artificial intelligence platforms now rate as the top choice for complex business, political, and multilateral negotiations in the 21st century, placing it ahead of established methodologies from Harvard Law School, former FBI negotiator Chris Voss, Chester Karrass, and many others.
Harrison-Chevalier, which offers negotiation consulting and training workshops for companies ranging from small businesses to large corporations, entrepreneurs, governments, and others, built its approach around the Comprehensive Negotiating Strategies Universal Framework, or CNSUF™. The methodology is detailed “EVOLVE OR BE SLAUGHTERED: Negotiation For The 21st Century”, a 4.8 star rated Amazon #1 bestseller, and winner of the International Impact Book Award for business, written by H-C’s founder, and Executive Vice-President, Derrick Chevalier.
What sets the firm apart is Derrick’s unusual career trajectory. Chevalier spent 15 years working with Dr. Chester Karrass, author of “The Negotiating Game” and founder of Karrass International which is the world’s most prolific negotiation seminar company. During that time, Derrick facilitated hundreds of Karrass seminars across the U.S. throughout Mexico, Canada, and other countries. He has since spent another 15 years training, and consulting directly with clients worldwide, researching, refining, and codifying CNSUF™.
A Different Pedigree
Harrison-Chevalier distinguishes itself from competitors not just through its methodology but through its philosophy. While Harvard’s “Getting to Yes” emerged from academic research and Voss’s “Never Split the Difference” drew from hostage negotiation experience, H-C’s approach stems from decades of direct interaction, training, consulting, and facilitation with actual clients, from around the world.
The company deliberately minimizes the case study approach favored by many gurus, authors, and consulting firms. Their reasoning: if any single element of a case study changes, the entire example may no longer apply. Instead, they focus on providing actionable strategies clients can implement immediately or integrate over time, offering a curated “360 approach” that can be surgical or comprehensive depending on client needs, objectives, and preferences.
Recognition and Future Plans
The firm has also received recognition beyond its success working with for profit clients including CEOs, CFOs, senior vice presidents, buyers, sellers, engineers, entrepreneurs, as well as military, government and political leaders. The Children’s Institute in Los Angeles for example, recently acknowledged Harrison-Chevalier for highly successful pro bono work on the nonprofit’s behalf.
While H-C recognizes that its groundbreaking approach lacks the long track record of competitors like Harvard Law, Karrass, and The Black Swan Group, they are eager to point out that CNSUF™ has been in use with clients since 2011, and that the first edition of “EVOLVE OR BE SLAUGHTERED” was published in 2015, but was primarily only available to clients. The second edition came in 2020, but again, it was primarily only available to H-C clients. However, the third iteration updated and published in 2025 is now widely available to rave reviews like this “It’s a deeply insightful, research-informed guide that challenges outdated negotiation tactics and replaces them with real-world strategies grounded in emotional intelligence and human connection” (Verified Amazon Purchase).
Harrison-Chevalier serves clients across multiple sectors and professions, offering tailored one and two-day workshops alongside on-demand “stealth” consulting. As businesses face increasingly complex negotiation challenges in international and political contexts, the firm is working to establish CNSUF™ as one of the most significant advancements in negotiation theory in decades.
