She is almost prescient in her ability to identify what’s in store.
— David Preimesberger, CFO, The Doctors Company

Internationally renowned confidential coach and advisor to executives and entrepreneurs and founder of Leadership Quantified, Leslie L. Kossoff has been cited by as “one of the most intelligent and perceptive voices on executive and managerial leadership today.” Her clients range from Fortune 50s to start-ups in a broad range of industries and sectors in the United States, Asia and Europe. They include Fidelity Investments, Sony, TRW, Kraft Foods, Baxter Healthcare, the UK National Health Service, Seiko/Epson, 3M, Infonet and GM/Hughes.

She is the Founder and CEO of LeadershipQuantified LLC, publishing immediately implementable, measurable and repeatable online resources that take the place of consultants, mentors and coaches.

A former executive in the aerospace/defense and pharmaceutical industries, Leslie has provided testimony to the Parliament of the United Kingdom on manufacturing and small business procurement policies, advised Members of Parliament on leadership transition strategies and, currently, provides instruction on entrepreneurship and innovation to Chinese executive and student Delegations.

During her long-term alliance with Dr. W. Edwards Deming - the quality management expert whose teachings are the basis of the Toyota Manufacturing System (aka, Lean) - she assisted in his client consultations and presented on implementation obstacles and strategies at his seminars. Deming declared Leslie, “Quite simply, one of the best at implementation.”

Leslie is the author of numerous books, including the award-winning Executive Thinking: The Dream, The Vision, The Mission Achieved, and has had over one hundred articles published in journals including the Financial TimesInvestor's Business Daily, the Silicon Valley Business Journal and CEO magazine. She has written best practices for the Qatar Financial Centre Authority and is an invited voice for business, technology and finance blogs worldwide. She is one of the original Brain Trust members and a regular guest on the award-winning “Small Business Advocate” website and radio program. Jim Blasingame, its host, cites Leslie as “one of the top organizational thinkers for executives and business owners.”

She is the former Director of the Institute for Quality and Productivity Improvement at California State University, Long Beach, a founding Board member of the Global Women's Leadership Center at the Leavey School of Business, Santa Clara University and serves on the Advisory Boards of Cordville Capital Ltd., the Russia Research Network and the Enterprise Trust (UK).

Leslie holds Bachelor and Master of Arts Degrees in Organizational Communication from San Francisco State University and an interdisciplinary Master of Science Degree from the University of Oregon in Management Science, Research Methodology and Organizational Communication.

Leslie is a Fellow of the RSA (Royal Society for the encouragement of Arts, Manufactures and Commerce) and served as Chair of its Paris (France) chapter. She is a Freeman of the City of London.