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 About.com 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.

Leslie is direct, honest and accurate.
— Kenneth Romans, Senior Vice President, Fidelity Investments
Even as long as two years after Leslie had completed her work with us, I found myself thinking as issues were raised, ‘This is what Leslie was talking about. This is what she wanted me to be prepared for.’ And, because of her uncanny ability to see and understand what was to come, I was prepared.
— Donald Antenore, Senior Vice President, Kraft Foods

Leslie Kossoff has the rare ability to effectively combine the objective elements of a situation with the passion of today’s business environment to create a success orientation that is uncommon in the day-to-day stride of management. Her ability to leverage individual strengths and views to stimulate the group raises synergy to a higher level.
— Wayne Kimball, Senior Vice President, Infonet Services Corporation

By bringing her considerable and wide ranging global experience across private and public sectors, Leslie helps Board Members discharge their fiduciary duty and address complex, difficult and sensitive issues - always with a mind to maximizing performance and steering the strategic agenda to implementation and delivery.
— Dr. Isobel Simpson, Board Member, UK National Health Service

It was as if she reached into my brain, crystallized and put into words all the things I was never able to articulate myself. She spoke my dreams - and then told us how to make them come true.
— Takeo Minomiya, Corporate Vice President & CEO, Semiconductor Company, Sony

Leslie is direct, honest and accurate.
— Kenneth Romans, Senior Vice President, Fidelity Investments

Leslie’s elegant thinking and advice is stimulating, thought-provoking and immediately challenged and motivated us all to scrutinize how we are leading.
— Mark Goldring CBE, Chief Executive Officer, Oxfam

Leslie was an inspiration to our executives and Non-Executive Directors. Her approach leaves people challenged and enthused at the same time and her contribution endures in the best way.
— Paul Sutton, CEO, UK National Health Service

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

I shall never forget all the very wise advice and support you gave me when I was Chairing the [UK] Conservative Women’s Organisation. I shall be forever grateful!
— The Baroness Hodgson of Abinger CBE

Leslie is a beacon of executive leadership, management and insight to even the most seasoned professional.
— Bernard Janov, Commander, U.S. Navy
Leslie is a beacon of executive leadership, management and insight to even the most seasoned professional.
— Bernard Janov, Commander, U.S. Navy

Leslie L. Kossoff offers an unsurpassed portfolio of confidential coaching and advisory services exclusively to executives, entrepreneurs and Boards of Directors. Each service - remote or in person - delivers the solutions clients seek as they create success for themselves and their organizations.

Whether your coaching needs are strategic, developmental, troubleshooting or transitional, with clients ranging from start-ups to Fortune 50s across industries and sectors in the United States, United Kingdom, Europe and Asia, Leslie's extensive experience brings clients a broader view of themselves, their organizations and the world. 

Leslie provides the services herself and, as such, accepts a very limited number of clients.

Contact her office for further information about Leslie's advisory services and to enquire about her availability.