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John Clark

VP of Field Engineering at Opal Security

San Francisco Bay Area

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About

John Clark is Vice President of Field Engineering at Opal Security. He has more than 30 years of experience spanning security, performance management, cloud infrastructure, networking, and protocol design, with a focus on technical sales leadership and customer engineering. His areas of expertise include cloud and network architecture, network and application performance monitoring, network security, and pre-sales engineering.

Experience

  1. Opal SecurityVice President of Field Engineeringcurrent2026 — presentSan Francisco Bay Area
  2. CiscoDirector, Solutions Engineering (AI Security)2025 — 2026San Francisco Bay Area
  3. CiscoDirector, Solutions Engineering (Cloud Protection)2023 — 2025San Francisco Bay Area
  4. Valtix (now part of Cisco)Vice President of Field Engineering2022 — 2023San Francisco Bay Area
  5. Valtix (now part of Cisco)Head of Solutions and Enablement2021 — 2022San Francisco Bay Area
  6. ThousandEyes (part of Cisco)Vice President, Global Solutions Engineering2018 — 2021San Francisco Bay Area
  7. ThousandEyes (part of Cisco)Director, Solutions Engineering2015 — 2018San Francisco Bay Area
  8. ThousandEyes (part of Cisco)Senior Solutions Engineer2015San Francisco, CA
  9. Riverbed TechnologySr. Director, Systems Engineering2013 — 2015San Francisco Bay Area
  10. OPNET Technologies, Inc.Vice President, Applications Engineering2010 — 2012San Francisco Bay Area
  11. OPNET Technologies, Inc.Associate Vice President, Applications Engineering2003 — 2010San Francisco Bay Area
  12. OPNET Technologies, Inc.West Coast Technical Director2000 — 2003San Francisco Bay Area
  13. OPNET Technologies, Inc.Senior Applications Engineer1998 — 1999San Francisco Bay Area
  14. OPNET Technologies, Inc.Applications Engineer1997Washington DC-Baltimore Area
  15. ROAR Multimedia ProductionsAudio Production Engineer1995 — 1997Washington DC-Baltimore Area

Skills & more

Pre-sales41Solution Selling26Sales Engineering54Systems Engineering26TCP/IP14Professional Services11Data Center20Network Architecture19Sales25Virtualization37Cloud Computing52Enterprise Architecture11
+12 moreApplication Performance ManagementNetwork SecuritySoftware EngineeringProduct ManagementNetwork DesignGo-to-market StrategySales EnablementNetwork EngineeringSaaSEnterprise SoftwareUnixLinux

From John's professional profile.

Frequently asked questions

Who is John Clark?
John Clark is Vice President of Field Engineering at Opal Security. He has more than 30 years of experience spanning security, performance management, cloud infrastructure, networking, and protocol design, with a focus on technical sales leadership and customer engineering. His areas of expertise include cloud and network architecture, network and application performance monitoring, network security, and pre-sales engineering.
Where did John Clark go to school?
John Clark studied at Johns Hopkins University, Whiting School of Engineering (MS, Electrical Engineering); Johns Hopkins University, Whiting School of Engineering (BS, Electrical Engineering); Johns Hopkins University, Peabody Conservatory of Music (BM, Recording Arts and Sciences).

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