CoachSource Principals

Brian O. Underhill, Ph.D. | Brian is CoachSource's Founder and CEO, who is an industry-recognized expert in the design and management of worldwide executive coaching implementations. Brian is the author of Executive Coaching for Results: The Definitive Guide to Developing Organizational Leaders (Berrett Koehler... more

Stephen E. Sass | Steve is a Founding Partner and Engagement Manager of CoachSource, LLC. His 50+ year business career includes 28 years with IBM in customer service and education executive management, and four... more

Kimcee McAnally | Kimcee is a Partner/Owner of CoachSource. Kimcee's background includes 25+ years working with companies in the areas of executive coaching, leadership development, organizational development & change management. She has an executive business background, holding c-suite... more

Meet the Engagement Managers

Helfried Albrecht | Helfried Albrecht, Ph.D. is a very experienced executive coach, leadership and organizational development consultant. Over the last 15 years, he worked with hundreds of leaders in many industries in Europe, Middle East and the US... more

Jeffrey Cohen | Jeffrey M. Cohen, MBA, has over 30 years of consulting and corporate experience. Having been an executive coach for much of that time, he has been acknowledged for his "pioneering work." While executive coaching is his primary... more

Dan Feldman | Dan Feldman is CoachSource's Team Coaching Specialist and an Engagement Manager. Dan is an Executive Coach who helps senior leaders build sustainable leadership and broaden their leadership style to improve influence, resilience, and team performance... more

Josette Goldberg | Josette is an Engagement Manager and Senior Executive Coach who specializes in taking already successful business leaders and their teams to the next level of performance... more

Keiko Hsu | Keiko Hsu is the VP of Client Operations, responsible for a team of Engagement Managers serving strategic accounts at CoachSource. She also serves as an Engagement Manager, as well as coach/business coach, coaching senior executives at major Fortune 100 corporations... more
Heidi Kraft | Heidi Kraft, is an Engagement Manager, successful entrepreneur, executive leadership/team, coach and accomplished executive. She combines her solid business experience with her passion to help individuals and teams develop the leadership skills... more

Jeff Nally | Jeff Nally is the Vice President of the Global Coach Community, Group Coaching Product Specialist, and Engagement Manager at CoachSource. As the Vice President, Global Coach Community, Jeff leads the strategy, development, and connection for more than 1,100 coaches. He and his team attract, engage, and retain coaches to meet the growing demand for experienced executive coaches... more

Erin O'Connell | Erin O'Connell is an Engagement Manager, Ph.D, PCC who brings her early work in theater and deep experience consulting in public and private sector organizations to her leadership development programs and coaching clients.  She is recognized as a joyful, inquisitive coach effective in aligning business strategy with practical solutions to enhance individual, team, and organization performance.

Ken Parekh | Ken Parekh brings over twenty five years experience advising global businesses and Boards in highly competitive marketplaces, strengthening organizational capabilities and building and leading high performance teams... more

Stephen E. Sass | Steve is Managing Partner and CFO of CoachSource, LLC, and President of Sass & Associates, Inc. a performance consulting firm. His 40+ year business career includes 28 years with IBM in customer service and education executive management, and four... more

Ann Van de Perre | Ann has more than 25 years of international corporate experience as Executive coach, strategic HR & Organization Development Executive in Fortune top 500 organisations. Ann is an in-depth guide and catalyst for boosting leader’s success... more

Meet the Staff

Patty Ainsworth | Patty joined CoachSource in 2009, primarily as Brian's executive assistant. Since then she previously supported Kimcee McAnally, and has also become Executive Assistant to Jeff Nally, as well as working directly with clients and coaches, as a Coach Associate... more

Tracey Bertolina | Tracey leads the finance organization and has 30+ years of experience in accounting, financial planning, and acquisitions. Tracey has worked in a variety of industries and has made it an ongoing priority to improve and enhance all aspects of financial reporting and systems... more

Zia Best | Zia Best serves as an Account Service Manager and Diversity, Equity & Inclusion Specialist for CoachSource. As an account manager since 2017, she manages 70 corporate clients and oversees more than 200 1:1, group, and team coaching engagements per year. She works directly with global organizations...more 

Kathleen Diekmann | Kathleen joined CoachSource in 2016 as a Billing Specialist. Prior to joining CoachSource, she was Director of Core Systems Operations Support at Visa and worked in Internal Audit for both Charles Schwab and Lockheed Martin. She has a B.S. in Accounting and lives in Northern California with her family.

Dave Dowling | Dave Dowling is Chief Information Officer (CIO) at CoachSource. Working with the Executive team, Dave supports the firm through his technical leadership, vision, and expertise. He is active in and responsible for software development, data... more

Teri Frangie | Teri handles Global Business Development for CoachSource. She is a business development executive who builds and leverages relationships to achieve two goals: to help organizations develop effective leaders; and to help organizations increase their results through innovative practices... more

Glenda Gasmen | Glenda joined CoachSource in 2017 as Executive Assistant. Glenda has over 20 years of experience in office administration, holding a variety of roles - Office Manager, Events Manager, Program Manager, and Executive Assistant. She helps sustain the mission of leadership and executive development communities and is based in San Diego, California.

Keiko Hsu | Keiko Hsu is the VP of Client Operations, responsible for a team of Engagement Managers serving strategic accounts at CoachSource. She also serves as an executive coach/business coach, coaching senior executives at major Fortune 100 corporations... more

J'Aimee Mission | J'Aimee, Director of Client Service and Strategic Initiatives for CoachSource, has a background in analytics, leadership, training, and project management. She has a combination of consulting, and business client service experience from her work at The Spur Group, a business management consulting firm... more

Laura Parks | Laura joined CoachSource in 2019 as a Project Assistant. She has over 30 years of experience in production, project, and program management and is certified in Lean Six Sigma. Prior to CoachSource, Laura worked at HP in Silicon Valley for 20 years.  Located in California, Laura enjoys hiking, skiing, sewing, and spending time with family and friends.

Allegra Sass | Allegra joined CoachSource in 2012, serving primarily as Executive Assistant to Stephen Sass. Since then, she has also gained the titles of HR associate... more

Kathy Vlietstra | Kathy joined CoachSource in 2019 as a Project Assistant.  She has been an Online Business Manager/Virtual Assistant for the past 10 years and is the administrator for ICF Michigan.  Prior to that, she held several positions, including website project manager, recruiter, and program manager.  Kathy is based in Michigan.  In her spare time, she loves to swim, hike, and be outdoors.  She enjoys spending time with friends and her son.

Angie Voorhees | Angie has been with CoachSource since the very beginning, serving as Accounting Manager. Previous to joining CoachSource, Angie worked in public accounting for over 20 years. She graduated in 1989 with a B.S. in Accounting, and lives in New Jersey with her family... more


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