Masami(SAMY) Mizukoshi

GTM Leadership at OpenAI

Location n/a
OpenAIex-Salesforceex-Slack

My career started to work for Japanese Manufacturing Company as a Development Engineer in 1999. And then, I have been working as a Pre-Sales of some exciting products and solutions in variety of industries with wonderful colleagues for more than 15 years.

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Now I'm enjoying tapping a new collaboration market, building an amazing team, working with customer to make their life more productive and pleasant at Slack. Area of Technologies: SaaS, CRM, Analytics, ECM, BPM, RDB, Social, Collaboration Industry Experiences: Insurance, Financial, Manufacturing Development Experiences: Java, C++, VB

Career TimelineNOW → PAST

GTM Index

  1. OPENAIJOB
    1. GTM Leadership at OpenAI
      1Y 3M
    2. GTM at OpenAI
      3M
  2. SALESFORCEJOB
    1. Senior Dir, Head of Soluti…
      10M
    2. Senior Dir, Solutions Eng…
      9M
    3. Dir, Solutions Eng of Japa…
      2Y 3M
    4. Sr. Mgr, Solutions Eng of…
      4M
    5. Principal Solutions Eng fo…
      4Y 10M
  3. SLACKJOB
    1. Sr. Mgr, Solutions Eng, Ja…
      3M
    2. Mgr, Solutions Eng Japan
      1Y 8M
    3. Sr. Solutions Eng Japan
      1Y 3M
  4. IBMJOB
    1. Senior Advisary ITS, Softw…
      11Y 9M
  5. TOPCON CORPORATIONJOB
    1. Software Developer
      2Y 11M
  6. TOSHIBA (LANDIS GYR)JOB
    1. Software Development Eng
      1Y 8M

Time in market 27Y 4MOpen 1Closed 12Stints 13

gtmindex.io/p/samy-mizukoshi

  1. Job: Salesforce — Senior Director, Solutions Engineer of Japan and Korea at Slack Business Unit · 2023-08 – 2024-05
  2. Job: Slack — Manager, Solutions Engineer Japan · 2020-02 – 2021-10
  3. Job: Toshiba (Landis Gyr) — Software Development Engineer · 1999-07 – 2001-03
  4. Job: Salesforce — Principal Solutions Engineer for FINS at Large Enterprise · 2014-01 – 2018-11
  5. Job: Salesforce — Director, Solutions Engineer of Japan and Korea at Slack, A Salesforce Company · 2022-02 – 2024-05
  6. Job: IBM — Senior Advisary ITS, Software Technical Sales for RDB, ECM, BPM and FileNet · 2002-04 – 2014-01
  7. Job: Topcon Corporation — Software Developer · 1999-04 – 2002-03
  8. Job: OpenAI — GTM Leadership at OpenAI · 2025-05 – present
  9. Job: Salesforce — Senior Director, Head of Solutions Engineer at Tableau & Slack Business Unit of Japan and Korea · 2024-05 – 2025-03
  10. Job: Slack — Sr. Manager, Solutions Engineer, Japan and Korea · 2021-07 – 2021-10
  11. Job: Salesforce — Sr. Manager, Solutions Engineer of Japan and Korea at Slack, A Salesforce Company · 2021-10 – 2022-02
  12. Job: Slack — Sr. Solutions Engineer Japan · 2018-11 – 2020-02
  13. Job: OpenAI — GTM at OpenAI · 2025-03 – 2025-06

Skills

MakeVisual BasicSolarisOracleDatabasesSoftware DevelopmentProgrammingCloud ComputingTechnical RecruitingJavaWindowsC++Enterprise Content ManagementBusiness DevelopmentCRMSaaS

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