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Freddy Madrigal Castillo

@freddymadrigalcastil

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Windows OS Engineer at 8base (Archie Labs) who restored secure WinRM access with zero unplanned downtime.

Costa Rica

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At 8base (Archie Labs), I renewed expired WinRM HTTPS certificates across a Windows Server fleet, restoring secure remote management with zero unplanned downtime. I also automated FSLogix profile and golden-image workflows across Azure Virtual Desktop and Google Cloud Platform.

At Microsoft, I troubleshot Windows performance and IIS service issues and created a PowerShell script to capture diagnostic data during high-CPU events. Earlier, at TradeStation, I patched Windows servers with Tanium for a 24/7 trading platform, and at Align Technology I administered VMware environments across five countries.

Experience

Work history, roles, and key accomplishments

Windows OS Engineer

8base (Archie Labs)

May 2026 - Oct 2026 (5 months)

Detected and renewed expired WinRM HTTPS certificates across the Windows Server fleet with zero unplanned downtime. Engineered multi-cloud FSLogix profile redirection and automated Active Directory attribute management with PowerShell.

Windows Server WinRM Certificates FsLogix Azure Virtual Desktop Google Cloud Platform PowerShell Active Directory Git Infrastructure as Code

Technical Support Engineer

Microsoft

Jan 2024 - Feb 2026 (2 years 1 month)

Resolved deep-level Windows performance issues using Sysinternals, Performance Monitor, and memory dump analysis. Diagnosed IIS service failures and delivered expert guidance on high-performing Windows experiences.

Windows Server Sysinternals Performance Monitor IIS PowerShell Azure Hyper V VMWare Microsoft Copilot

Data Center Engineer

TradeStation

Feb 2023 - Jun 2024 (1 year 4 months)

Performed server patching with Tanium for a mission-critical 24/7 trading platform. Led incident response bridges for Sev 1-3 events and documented technical timelines for post-incident reviews.

Tanium Windows Server Incident Management High Availability Monitoring Stakeholder Communication

Sr. Technical Support Engineer

Persistent Systems

Feb 2022 - Feb 2023 (1 year)

Embedded within Microsoft's Windows Performance organization, built PowerShell scripts to automate diagnostic data capture during high-CPU events. Recognized for performance and technical depth, leading to conversion to a direct Microsoft role.

PowerShell Windows Diagnostics Automation

SAP Basis Administrator

IBM | Kyndryl

May 2020 - Feb 2022 (1 year 9 months)

Performed maintenance, monitoring, and version upgrades for SAP and HANA environments. Managed high-severity ServiceNow tickets and served as Team Lead during critical operations.

SAP BASIS Hana ServiceNow Incident Management Team Leadership

Sr. System Administrator

Align Technology

Jan 2018 - Apr 2020 (2 years 3 months)

Administered Windows servers, Active Directory, and vCenter/ESXi across multiple countries. Automated Active Directory user provisioning with PowerShell and resolved critical capacity constraints by recycling decommissioned servers.

Windows Server Active Directory Group Policy VMWare VCenter VMware ESXi DNS DHCP PowerShell Linux

Service Desk Engineer

Align Technology

Feb 2012 - Dec 2017 (5 years 10 months)

Delivered technical support for end users in a global manufacturing environment. Managed ServiceNow incidents and administered Cisco Call Manager, Unity, and Unified Intelligence Center.

Active Directory Microsoft Office Exchange Skype For Business ServiceNow Cisco Call Manager Cisco Unity Connection Remote Support

Education

Degrees, certifications, and relevant coursework

Universidad Latina de Costa Rica

Bachelor's Degree, Systems Engineering

2008 - 2016

Bachelor's Degree in Systems Engineering from Universidad Latina de Costa Rica, completed in 2016.

CENFOTEC

IT Academy Training, Cloud & Virtualization

Training in Cloud & Virtualization Concepts, Network Virtualization Concepts, and Software Defined Storage Concepts in VMware virtualization environments.