David Longstreet
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Client List


I have  consulted with over 90 Fortune 500 companies and organizations across a wide range of industries. This gives me a wide variety of experience with data. Besides the USA, I have consulted in Italy, France, Germany, Belgium, Brazil, Singapore, Australia, South Africa, Portugal, Spain, Great Britain, Saudi Arabia, and Canada. Below is a list of my clients (and employers).
​
  • FanThreeSixty
  • H&R Block
  • Microsoft Corporation (Bing)
  • MasterCard International
  • The GAP
  • Cingular Technologies
  • USAA Insurance
  • Real IRM (South Africa)
  • DBS Systems
  • Amadeus (Nice, France)
  • California State Pension Fund (Calpers)
  • Xerox
  • Dana Credit Corporation
  • Ralston Purina
  • GTE
  • Nelcor Clinical Systems
  • MONY
  • Deloitte Consulting
  • Start (Frankfurt, Germany)
  • JP Morgan Retirements Services
  • Beckman Heath Instrumentation
  • BioLogic
  • GE Fanuc Automation
  • Bel Canada
  • OAO Office of Administrative Operations
  • Optimis (Paris, France)
  • Vantagem (Lisbon and Porto, Portugal)
  • BellCore
  • Lockheed Martin
  • Equifirst Mortgage
  • United States Marine Corps
  • AT&T
  • Telesoft (Rome, Italy)
  • United States Department of Defense (DOD)
  • CSELT (Torino, Italy)
  • Let'sTalkGroup  (Lisbon, Portugal)
  • DST Innovis
  • GE ERC
  • Logikos
  • Saudi American Bank (Ryhad, Saudi Arabia)
  • California Microwave
  • Midwest Health Research Institute (MRI)
  • Motorola
  • NelCor Medical Instruments
  • General Motors On Board Systems
  • Ciber Consulting
  • Iridium Satellite Solutions
  • RPS (Road Package Service)
  • PacBell
  • Internal Revenue Service
  • United States Department of Treasury
  • NASA/JPL
  • Roche Healthcare Systems
  • Accenture
  • Information Systems of Florida
  • Telecom Italia
  • AGFA Healthcare
  • University of Minho (Porto, Portugal)
  • Intersolv
  • DirecTV
  • Nissan Motor Corporation (Tokyo, Japan)
  • Bell Atlantic
  • McDonalds Corporation
  • Societa Generale d'Informatica Spa SOGEI (Rome, Italy)
  • California Department of Corrections
  • The United Nations
  • Sprint Telecommunications
  • Transamerica Leasing
  • Geneer Consulting
  • United States Court Systems
  • NATO (Kiev, Ukraine)
  • United States Navy (Pacific and Atlantic Fleet)
  • DST
  • Visonet
  • University of Texas El Paso
  • Nielsen Ratings
  • ThoughtWorks
  • United Telecom
  • Ministry of Finance of Italy (Rome, Italy)
  • ISSC Australia and Singapore
  • Informatica Trentina (Trento, Italy)
  • EDS Mexico

Passions and Professionalisms 


  • Home Page
  • Data Science
  • Articles
    • Data Science >
      • Data Science Projects
      • Machine Learning
      • Logistic Regression
      • Regression (for the non data scientist)
      • Polynomials
      • Modeling Steroid Usage in MLB
      • Building Blocks of Data Science
    • Leadership >
      • Leadership
  • MyBookSucks
  • Art and Data
    • Art of Data
    • Voronoi Diagrams >
      • Voronoi As Art >
        • Voronoi Explained
        • Shades of Grey
  • About David
    • Short Bio
    • Client List
    • Learning Piano
    • Resume
    • Contact Me