North America

Leadership You Can Count On

Our Expertise Is Your Advantage

Miller Heiman Group’s executive leadership team includes some of the most successful sales and service professionals in the industry – people who have succeeded in their careers by outperforming the competition time and time again. Now, they’re working in your corner and applying their expertise to improving your organization’s performance in a rapidly changing global business climate.

Byron Matthews

President & CEO

Byron Matthews leads Miller Heiman Group’s commitment to providing organizations worldwide with an expanded, holistic approach for developing, managing, and sustaining long-term customer relationships. With more than 20 years of experience, Byron has consulted for and led sales organizations for several Fortune 500 companies.  He has collaborated with industry leaders throughout the world at companies like Microsoft, AT&T, Samsung, and Coca-Cola on the development of pipeline and revenue management solutions, implementation of sales methodologies, optimization of sales management processes and compensation plans, and competency models linked to assessment and recruiting. Byron’s prior experience includes serving as Chief Sales Officer at Aflac, where he led over 30,000 sales professionals across multiple channels, and over five years at Mercer as Global Sales Leader and Global Head of the Sales Performance Practice. Byron received his MBA at the University of Chicago.

Dana Hamerschlag

Chief Product Officer

Dana Hamerschlag is a strategic technology leader with a track record of launching innovative and new cloud-based solutions for learning. In her role at Miller Heiman Group, Hamerschlag leads the global product organization and is driving the continued innovation of the Be Ready suite of solutions. She brings more than 15 years of experience in technology companies backed by venture capital and private equity, where she has run product management, product marketing, strategy and operations. Previously, Hamerschlag served as vice president of product management at Ellucian, where she led the CRM business and significantly grew revenue from $0 to $38 million and paved the way for a $3.5 billion transaction. She spent the early part of her career at The Boston Consulting Group, where she led transformational change efforts, organizational redesign and strategy projects for clients across a wide variety of industries, including consumer products, industrial goods, healthcare and technology.

Seleste Lunsford

Managing Director, CSO Insights


Seleste Lunsford has consulted with sales and service organizations for more than 20 years, helping them acquire, grow and retain client relationships. As Managing Director of CSO Insights, Seleste helps guide our research focus areas and define our market deliverables. An experienced business leader, Seleste has led a range of product development, professional services and operations functions. She co-authored two books: Secrets of Top Performing Salespeople (2003 McGraw Hill) and Strategies that Win Sales (2005 Dearborn Publishing). She’s also written articles on sustaining sales effectiveness found in Selling Power, Entrepreneur, Chief Learning Officer and PharmaVoice, as well as at and She’s proud to have supported some of the world’s most recognized companies, including AAA, Alliance Bernstein, American Express, Arrow Electronics, Citibank, Convergys, U.S. Department of Defense, Office Depot, Traveler’s Insurance, Verizon Wireless and many of the world’s largest big box retailers.

Allen MuellerAllen Mueller

Chief Revenue Officer

Allen Mueller brings a wealth of knowledge and a history of driving double-digit sales growth to Miller Heiman Group, where she leads the team of sales professionals globally and is responsible for the management of Strategy Ready and Talent Ready. Mueller’s ability to lay out a strategic plan, infused with data analytics, has enabled her to achieve a consistent record of sustained growth and overachievement during her career. Before joining Miller Heiman Group, she served as the managing director of sales and account management for The Corporate Executive Board (CEB). In this position, she was responsible for sales and renewals across two highly competitive practice areas – Information Technology and Financial Services – and she consistently exceeded her growth targets. Mueller earned CEB’s Member Impact award in 2013, which is given annually by the company’s CEO. She was the head of vertical markets for Blackboard from 1999-2001. She has a bachelor’s degree from the University of Maryland, and resides in Alexandria, Va., with her husband and two daughters.

Aaron Romigh

Chief Operating Officer


Aaron Romigh is a champion of change and operational excellence, making him an ideal Chief Operating Officer at Miller Heiman Group. His passion is to deeply understand every aspect of his customers’ business and then deliver unique and innovative solutions to meet the most pressing challenges. As COO, Romigh makes certain every aspect of the company delivers exceptional client value that leads to organizational transformation. Romigh also has a deep understanding of technology and the role it can play in helping customers improve performance and increase revenue. Before joining Miller Heiman Group, Romigh held senior level positions at CPA Global and Williams Lea, a division of DHL. Romigh has a bachelor’s degree from the University of Georgia and pursued graduate business studies at New York University.

Aimee Schuster

Chief Marketing Officer


Aimee Schuster specializes in establishing and scaling marketing departments for B2B and SaaS organizations, particularly in the realm of technology. In her work she routinely oversees all demand/lead generation, content, public relations, social media, business development and client communications. Earlier in her career, Schuster served as the vice president of Marketing at, and worked for the business development group at the global law firm DLA Piper. She holds Bachelor and Master of Arts degrees in public communication from American University; has served as an adjunct marketing professor at Columbia College Chicago; and most recently launched and co-chairs the Illinois Technology Association’s Women Influence Chicago Initiative.

Tom Werle

Chief of Staff

Tom Werle has over 10 years of experience leading various organizational transformation efforts within the spectrum of go-to-market strategy.  His expertise covers customer engagement, product marketing, sales operations, and service optimization, with a particular focus on the value of digital enablement.  At Miller Heiman Group, Tom leads our priority strategic initiatives, driving the Leadership Team to achieve specific growth objectives.  Prior to joining Miller Heiman Group, Tom led client engagement teams for Accenture’s Advanced Customer Strategy business and developed consumer marketing solutions for The Nielsen Company.  Tom holds a B.S. from the University of Illinois and an MBA from the University of Michigan.