Skip to main content
Custom Growth Solutions, LLC | Sandler Training | Oklahoma City, OK

This website uses cookies to offer you a better browsing experience.
You can learn more by clicking here.


Custom Growth Solutions, LLC

evolutionary growth model

Maximize Your Potential

At Custom Growth Solutions, LLC - A Sandler Training Center our growth model is an evolutionary one. Improved performance and behavioral change simply doesn’t snap into place over night. We don’t sprinkle you with magic dust to instantaneously transform you into a sales superstar or transformational leader. Through ongoing consulting, coaching, training, evaluation and reinforcement, we work with you to maximize your potential over time. We do so by imparting a triangular approach for achieving success - high performance behavior, a winning attitude and non-traditional sales techniques.

counter-intuitive approach to selling

Work Smarter, Not Harder

Sandler Training is a counter-intuitive approach to selling that takes the words “sleazy” and “pushy” out of the sales vocabulary. No longer are salespeople held hostage by their prospects, where they lack all power and leverage. Instead, you gain a selling edge by mastering a sales methodology, one that is more powerful than your prospect’s. In turn, sales people have more control over their prospects and customers, outsell the competition with updated skills and reach consistent quota achievement. And even more good news, you’ll waste less time and make more money by working smarter, not harder.

Meet our business growth experts

Our team

The members of our team include (left to right) Sean Nathan, David Curran, Courtney Maynard, Doyce Crandall, and Mike Crandall.

Owner & Principal

Mike Crandall

Mike Crandall is the Owner and Principal of Sandler Training in Oklahoma City, which specializes in sales, management, and leadership development for visionary, growth-minded clients in Oklahoma City and across the United States. Using psychological principles, Mike works with business owners and motivated individuals to create and implement professional development strategies to foster the growth of individuals, teams, and organizations.

Over the last twenty years Mike has been a proven leader in sales, marketing, communications, management, training, business development, market development, and client relations, which has allowed him to lead business growth regionally, nationally, and internationally across 45 states in the US and 5 provinces in Canada. He has held leadership positions with companies such as DeWalt/Black and Decker, James Hardie Building Products, and Propex. In addition to coaching, training, and consulting, Mike is a sought-after speaker and the author of Motivational Management the Sandler Way.

Managing Partner

Doyce Crandall

Doyce Crandall is a Consultant, Coach and Trainer focused on Sales, Management, and Leadership Development. She specializes in sales professional recruitment, assessing, and finding the right fit for your organization. We talk about Behaviors, Attitudes, Techniques, and Guts needed to be more Successful in Business Improvement, Sales Growth, and Employee Development. Our firm specializes in helping identify the Blind Spots and Obstacles that are holding you back and then implementing Systems, Behaviors, and Guts to become more Successful. Clients ultimately develop new Habits that lead to Proactive Growth professionally and personally.

Director of Business Development

David Curran

David Curran serves as a Trainer, Speaker, Consultant, and Director of Business Development for Sandler Training in Oklahoma City, OK. He helps Business Owners and Executives work on the behaviors, attitudes, techniques, and guts they need to be more successful in business improvement, sales growth, and employee development.

Before working at Sandler, David has served as the Vice President of Enrollment and Student Services for a multinational company working with universities to increase student enrollment and retention. He has led triple-digit expansion at multiple universities through enhanced communication, improved closing rates, shortened sales cycles, and systemized growth strategies garnered from the Sandler Selling System. David has also served as a business consultant for universities, think tanks, and start-ups, owned his own business tech and furniture firm, and for over 10 years led an iconic Southern California retail organization with annual revenue in excess of $45M.