Rinaldo Castillo
IT Specialist Field Engineer

Rinaldo Castillo

IT professional with 15+ years resolving hardware, software, and network issues across enterprise, clinical, and retail environments — including phone-based helpdesk, onsite field service, and enterprise deployment. CompTIA A+ certified with a consistent track record of first-call resolution and calm, precise support under pressure.

What I Do

Helpdesk & Remote Support

Phone-based and remote desktop support for Windows 10/11, Active Directory, MS Office 365, and VPN — with consistent first-call resolution across enterprise environments.

Network Infrastructure

Configuration and deployment of Cisco Meraki switches, access points, Palo Alto GlobalProtect firewalls, and VLAN infrastructure across 20+ enterprise site builds.

Field Service & Deployment

On-site installation, calibration, and troubleshooting of enterprise hardware — POS systems, diagnostic imaging equipment, and full office infrastructure buildouts.

Device Management & MDM

JAMF administration for Mac fleet management, MDM provisioning, policy enforcement, and device imaging across multi-OS environments using Intune and Active Directory.

What Clients Say

Reviews on Google

Industries Served

15+ years of hands-on IT work across a wide range of environments — from enterprise law firms and clinical labs to retail floors and financial district offices.

Field & Logistics
Nationwide hardware deployment across data centers, corporate environments, and multi-site enterprise locations.
Healthcare & Clinical
Diagnostic imaging systems, clinical lab infrastructure, and HIPAA-adjacent environments.
Retail & POS
Point-of-sale deployments, store network builds, and retail IT support at scale.
Professional Services
On-site IT support for law firms, consulting offices, and professional service firms across New York City.
Tech & SaaS
Internal IT support for fast-growing technology companies, managing multi-OS fleets and developer environments.
Residential & Small Business
Home networks, PC repair, smart home setup, and tech support for local New York families and businesses.

Fun Facts

Years in IT
15+
Enterprise Sites Served
50+
First-Call Resolution
95%
Technicians Trained
20+