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Dan Carollo

Dan Carollo

Senior Database Administrator at Zillow Group

Greater Seattle Area

Quick Summary of Experience:
18 years experience as a Systems Engineer with specific expertise in SQL Server (from SQL 6.0 to 2019). I've worked with both on-premise and Azure-based, customer-facing services including several Microsoft’s internal systems, Expedia®,, DigiMine® (now Audience Science®), Microsoft's Product Activation group, and Microsoft Windows Defender. I’ve worked overseas in Microsoft Ireland® for three years, and have experience collaborating remotely with global teams in India, Syria, Australia and Israel

I can do a bit of everything, but I have a passion for SQL Server and love troubling resolving live site incidents as well engineering continuous improvements to avoid repeat incidents. I am also skilled with writing, performance-tuning T-SQL, and developing automated and scalable maintenance/monitoring procedures to ensure optimal uptime across multiple systems.

Other responsibilities:
Deploying builds into a production environment, troubleshooting and resolving incidents, providing recommendations for bug fixes, performing bug fixes as needed, maintaining and monitoring database systems, providing historical performance trending, evaluating and recommending new technologies, T-SQL coding for data querying/modification, automating production and maintenance processes, escalating incidents to vendors as needed (ie. Microsoft CSS, other 3rd-party partners, etc.)

Specialties: Professional Qualifications
• Microsoft Certified Professional (certification no. 1187885) for SQL Server
- Relevant experience with SQL Server administration, design and implementation (versions 6.5 through 2019)
• Familiar with Microsoft Operations Framework (MOF) and IT Infrastructure Library (ITIL) standards and highly experienced with problem management and performance tuning, DevOps work.

Secondary Skills/Tools:
• IIS, Excel, Splunk, App Dynamics, TidalSoft (now Cisco Workload Automation), DocumentDB, some PowerBI, some Postgres, MySQL, ScyllaDB


  • Systems Engineer - Database Administrator Specalty (Microsoft (full-time))
  • Production Support Analyst (Microsoft (contract))
  • Senior Database Administrator (Zillow Group)
  • Database Administrator - Systems Engineer (Microsoft Ireland)
  • SQL Server Database Administrator (AudienceScience)
  • Senior Database Reliability Engineer (Zillow)
  • Database Administrator - Systems Engineer (Microsoft)


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