Licensed General Engineering (A) contractors in Naperville, CA

The California Contractors State License Board (CSLB) lists 2 General Engineering (A) contractors in Naperville, California. Each links to a full dossier with license status, insurance, bond, and enforcement — as of October 8, 2026.

2 contractors

1. Ex2 Fiber Services

   Naperville, CA · CSLB #1154739 · as of October 8, 2026
   Active · clear
2. Landmarc Environmental Systems LLC

   Naperville, CA · CSLB #1032403 · as of October 8, 2026
   Active · clear

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Data sourced from the California Contractors State License Board (CSLB), current as of October 8, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.