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Dedicated Career Coaches

Meet our professional and expert coaches to help you through your career transition.

Charlie Zinger

Charlie has more than 25 years business experience with small, medium and large sized companies in multiple industries. Over this span of time, Charlie has helped thousands of people in every aspect of career transition. Charlie brings his vast experience, real-world tools, and pragmatic approach to his coaching engagements.

Charlie earned a Bachelors degree from the University of Dallas.


Sandra Bierman

Sandra Bierman, PhD, has successfully transitioned through seven career changes. Her current passion includes the past 27+ years of career coaching utilizing her expertise as a job search strategist. Clients, colleagues, workshop participants and her one on one coaching professionals recognize Sandra for her enthusiasm, motivational support, and unending dedication to career management development.

Sandra has worked with a wide variety of companies including Fortune 500 companies as well as medium and small businesses to help employees through the career transition process. She has coached professionals at all levels of organizations.

Sandra thrives on improving a resume, coaching on job search strategy including networking, LinkedIn profile, social media, interviewing and negotiating processes.

Prior to her career coaching, Sandra taught at the university level. She concurrently served as Director for the Center of Learning at Texas Woman’s University where she trained teachers in the process of assessment, diagnostics, development, and implementation of instructional strategies.

Sandra’s business acumen comes from her extensive experience as an entrepreneur well-grounded in the business world as cofounder and Associate Publisher of internationally-recognized publications including Aviation Quarterly and Aviation Travel. She worked with curators at the Smithsonian Air and Space Museum to feature aviation pioneers in these publications. She was active as a private pilot traveling extensively marketing the publications at major aerospace events throughout the U.S., Canada and the Caribbean.

Sandra rolled out workshops on Boundaries and Divorce Recovery at her church. Sandra served on the Board for Attitudes and Attire, helping women reenter the workforce.

Sandra earned her Ph.D. and M.S. from Texas A&M, Commerce, Texas. Her B.A. is from The College of William and Mary, Williamsburg, Virginia.


Bruce Weaver

Bruce offers exceptional people related insights based on his twenty plus years of experience in talent management and career coaching. He has worked for several international organizations in a variety of industries including over twenty years in the Oil and Gas industry. He has had the opportunity to provide coaching and competence development planning to all levels. Bruce has been a group leader and guest speaker at several professional career transition groups.

Bruce holds a Bachelor of Arts degree in History and English from the University of Houston.


Marilynn Graves

Marilynn is an Executive Coach and High Performance Consultant and Leader for the MentorRings Leadership Development Program. She spent the first two decades of her career building success in the corporate world in banking and finance where she focused on relationship management and leadership program design and delivery for emerging leaders.

Marilynn is passionate about working with women and young professionals to help them advance and succeed throughout all stages of their careers. Her clients appreciate her strong business acumen and ability to help people drive business strategies and results.

Marilynn holds a MBA with a Finance concentration from DePaul Graduate School of Business and a BA from Illinois Wesleyan University (IWU). Marilynn is certified in Genos’ Emotional Intelligence programs, assessments and coaching, as well as The Leadership Challenge® programs, assessments and coaching. She currently serves as a Director of the IWU Alumni Board and President for the IWU Council for Women.

Kathleen Murphy

Kathleen Murphy

Kathleen quickly creates robust coaching relationships built on empathy and trust. A sense of humor, keen perception and active listening skills help to delve into candidates’ abilities, skills and desires for next career steps. Kathleen is fearless in mentoring and becoming a trusted advisor.


Kathleen has professional experience in Executive and Management transition coaching as well as project management. She has worked with 80% of the Fortune 500, along with private equity, privately held and nonprofit enterprises. Working nationally, she’s been in all regions of the United States (plus Canada). In addition, she has held an advised in strategic planning for large RIFs and is considered to be a subject matter expert in career transition logistics.

Both as a Clinical Psychotherapist and career transition coach, Kathleen has met folks at an interesting juncture in their lives where a change is needed. She is not only able to work comfortably one-on-one, but also in group settings (seminars/workshops) or managing projects (up to 1,000 employees).


Kathleen has worked with various industries such as…

High Technology
Food & Beverage
Oil & Gas
REIT and Property Management

Certified Substance Abuse Counselor (past)
Certified coach

Bachelor of Arts - Social Work, Western Illinois University


Claudia Chavez-Castilla

Claudia has a background in both Human Resources and Market Insights and over 20 years of organizational experience in multinational companies such as PepsiCo, Holderbank and Gallup. She is fully bilingual in both English and Spanish and able to coach present or lead seminars in whichever language her client chooses. She also has vast experience in multi- cultural and diverse environments.
Claudia provides clients with a broad vision, that combines her corporate and practical customer and market based approach with a profound humanistic-psychology sense. The combination of these approaches drive results for her clients to access self-awareness and positive self-image in a unique and individualized way. She has been in the International educational area for the past 8 years and currently is part of the faculty for Psychology and Nursing at SUAGM, a private dual-language institution in the Dallas area.


Brian Allen

Brian has over fifteen years’ experience as a Career Development Coach/Consultant in both corporate and private practice and is passionate about helping individuals take control of their own careers. Brian became a Career Coach while working for Southwest Airlines, where he was responsible for creating an internal career coaching program. Brian also worked as a Career Coach for Lockheed Martin, and is recognized as an authority in using assessment tools to help individuals make wise career choices.

Sandra Lopez Garza

Sandra Lopez Garza

Sandra Lopez Garza combines her 18+ year’s leadership experience with her solid bottom line career coaching approach. Her own career has given her a series of administrative and coaching experience, leadership training, and mentoring, and conflict resolution training.

With Sandra’s background in education and leadership development, she has developed new leaders and worked with many individuals as an internal career consultant. Sandra’s passion and mission provide a guiding light to job seekers and career changers as they navigate the waters of an ever-changing world of work. She works collaboratively, in partnership with her clients to identify the real issue(s), match values with career choices, gain more self-awareness, explore options, overcome obstacles and set goals with accountability.

Sandra has been member of United Way Leadership Society, Texas Principals and Supervisors Association, MANA Fort Worth, and The Hispanic Women’s Network. She currently serves on various boards, holding leadership roles within the community. She has volunteered in mentoring middle/high school students, while assisting in raising over 1/4 million dollars in college scholarships.

Areas of career consulting specialties include Career Transition; Career Change; Career Decisions; Retirement, Life and Career Options; Leadership Development; Program Management; Performance Coaching; and Training and Development.

Sandra earned her M.A. from the University of Texas at Austin and a B.A. from the University of Texas at San Antonio. Her post graduate studies have been at the University of North Texas and attended the Harvard School Urban School Leaders Program.