Joshua Castillo

Joshua Castillo

Low-Voltage & Network Infrastructure Specialist

San Antonio, TX · Licensed Security Installer, Texas DPS #01743746

Professional Summary

Joshua adjusting an Avigilon multi-sensor camera from a ladder Joshua in a hard hat reviewing plans on a high-rise jobsite Joshua working on a wall-mounted network rack Joshua on a ladder installing ceiling hardware in a high-rise space

As a small business owner working mostly on a contract basis, I know the full project lifecycle, from site survey and estimate through installation, documentation, and closeout. I’m comfortable managing multiple deadlines, coordinating with project managers, and leading crews. I learn fast, make decisions, and keep work moving. My core work spans structured cabling (CAT6/CAT6a), IDF/MDF builds, switching and wireless, IP video surveillance, and access control.

I work statewide to industry standards and local code, I never trade safety for a deadline, and I take pride in doing the job right the first time. When a job needs to be done right, I’m the one project managers call. I’ve earned that by resolving issues others left behind, documenting the fix, and staying with the work until it’s complete.

A motto I live by: “The way you do anything is the way you do everything.” This site is that motto in practice. Rather than just tell you what I can do, it shows the work.

I’m open to new opportunities, travel included. Feel free to review everything below, and if I look like a fit for your next open position, let’s talk.

✉ Get in touch

Relevant Experience

Contract Field Service Technician

Field Nation marketplace · 2023 to present · Texas and surrounding markets

5.0★ across 267 ratings · 418 jobs · Top 3% of providers · 100% on-time

▸
  • Install, terminate, and test CAT5e/6/6a across hundreds of commercial sites; rack and dress network rooms (IDF/MDF).
  • Install switches, firewalls, and wireless access points from major manufacturers.
  • Deploy and troubleshoot IP camera systems, access control, A/V, and telecom.
  • Selected for the Field Nation Master Pool, Nationwide (2025).

Track Record · 2023 to Present

418jobs completed
72clients served
5.0★across 267 ratings
99success score (top 3%)
100%on-time (last 30)
0backouts or no-shows

Work Mix

Low-voltage cabling
306
Server & networking
303
IP cameras
80
Telecom
16
A/V & digital signage
16
Access control
7
Fiber cabling
5

Jobs by category. One job can count in more than one category.

Owner · INFINITECH LLC

San Antonio, TX · Licensed Security Services Contractor, Texas DPS #B30992101

▸
  • Founded and operate a licensed commercial low-voltage business: site surveys, estimates, installation, and client communication.
  • Video surveillance, access control, and structured cabling for commercial clients.
  • Company site: infinitech-us.com

Featured Projects

Video Surveillance · Structured Cabling · Multi-Building Deployment

Joshua in a hard hat and safety glasses testing cabling with a handheld tester
Large wall monitor showing dozens of live camera views
Bullet camera mounted under a platform above a production line
Bullet camera mounted on industrial machinery
Bullet camera on a junction box mounted to overhead structure
Technician in a hard hat and safety vest on a ladder beneath cable tray and conduit
Open network cabinet with patched switches and a monitor
Rack-mounted video recorder below a UPS
Bullet camera on a concrete wall with conduit

Manufacturing Facility

Nov 2025 to May 2026 North Texas
Project Overview

Managed and delivered a large-scale video surveillance deployment across a multi-building manufacturing campus. Led the project’s integrated design and worked alongside and managed installation crews from site survey through commissioning. Expanded the engagement by surveying, scoping, and proposing new phases as the client’s needs grew.

Role

Onsite Project Manager / Lead Technician

Key Contributions

Project Management
  • Directed installation crews of up to four technicians as onsite project manager and lead technician
  • Conducted site surveys and scoped follow-on phases as the client’s requirements expanded
  • Coordinated work with multiple departments to minimize disruption to live production on tight schedules
  • Led daily safety briefings and completed Job Safety Analyses (JSAs) before each shift
  • Managed daily security check-ins, progress reporting, and materials inventory
Design & Documentation
  • Refined preliminary designs to meet field conditions and site requirements, improving network clarity and scalability for future expansion
  • Engineered a segmented surveillance network, isolated from business systems, to strengthen security, support compliance, and simplify ongoing management
  • Produced rack elevations, connectivity diagrams, and as-built documentation that served as the authoritative reference for remote teams
  • Documented field adaptations as the infrastructure evolved, keeping stakeholders aligned across a large, changing deployment
Installation & Infrastructure
  • Deployed network infrastructure hardware (PoE switches and UPS redundant power) at distribution points across the facility
  • Interconnected IDFs over a fiber backbone and extended the network to detached buildings with point-to-point wireless bridges
  • Installed 500+ ft of ½" to 2" EMT conduit, strut, and cable supports, including aerial lift work above 45 ft
  • Installed, terminated, and tested 15,000+ ft of CAT6 cabling to TIA-568 standards
  • Bench-tested, installed, aimed, and commissioned each camera, confirming operation and integration with the video management system

Results

130+Cameras deployed
15,000+ ftCAT6 cabling installed
500+ ftConduit installed
15+Network infrastructure devices deployed
0Safety incidents

What Clients Say

5.0Field Nation review
“Josh is my go to for his area. He is amazing and shows perspective pictures, which really help. He is always on time and does such a great job.”
Holly S. · Jun 2024
“Worked with them as a subcontractor on a critical government project. Their project management team helped us stay on track and hit the timeline. Nothing but quality work that met expectations the whole way.”
Steven R. · 2026
“Excelente technician well prepared and followed all instructions.”
Alexis V. · Aug 2025
“Joshua was very communicative and professional.”
Tiana L. · Aug 2024
“Great Quality Services! Really enjoy working with them.”
Preston B. · 2026

Skills

Project Management

  • Site surveys & scoping
  • Estimating & proposals
  • Scheduling & sequencing
  • Multi-site rollouts
  • Crew management & task delegation
  • Procurement & distributor ordering
  • JSA & jobsite safety
  • Closeout & client handoff

Design & Documentation

  • Camera coverage & placement
  • Network topology & IDF/MDF layout
  • Point-to-point wireless backhaul
  • Wi-Fi site surveys & heatmaps
  • Bills of materials (BOMs)
  • Labeling schemes
  • As-builts & system diagrams
  • Field reports & photo documentation

Installation & Infrastructure

  • Structured cabling (CAT5e/CAT6/CAT6a)
  • Termination & certification testing
  • IDF/MDF rack build & cable management
  • Switches, firewalls, WAPs
  • IP cameras & VMS
  • Access control
  • Labeling & documentation
  • Scissor lift / aerial work platform

Client Relations & Communication

  • Client & end-user communication
  • Prime contractor & GC coordination
  • Department & facility leads
  • Consultative sales
  • Needs assessment & site walks
  • Expectation setting & status updates
  • End-user system training
  • Professional written communication

Technical Stack

Security Platforms
Hanwha WAVE, Genetec, Avigilon, Avigilon Alta, SCW, Hikvision, Blue Iris
Networking
Ubiquiti UniFi, pfSense
Testing & Survey
Fluke cable certifier (CAT6), NetSpot Wi-Fi analysis
Design
Microsoft Visio, Draw.io, CCTVDesignTool, SketchUp
Cloud & Web
Vercel, Supabase, Cloudflare, GitHub, Microsoft Azure, AWS
Productivity
Google Workspace, Microsoft 365, Microsoft Teams, QuickBooks Online, Dialpad
Creative
Adobe Photoshop, Firefly, Acrobat, Premiere Pro
AI
Claude & Claude Code, ChatGPT, ElevenLabs, AI image & video generation
Hardware
Networking: Ubiquiti (incl. airMAX / airFiber), Cisco Catalyst, Cisco Meraki, Juniper / Mist, Aruba, Ruckus, Fortinet, SonicWall, Netgear, TP-Link OmadaCameras: Axis, Hanwha, Avigilon, Verkada, Hikvision, Vivotek, SCW, Reolink, LorexAccess Control: HID, Mercury, Allegion / SchlageInfrastructure: Panduit, Leviton, CommScope, Belden, B-Line, WiremoldPower: APC, Eaton, Tripp Lite, CyberPowerServers & Storage: Dell, HP, WD Purple, Seagate SkyHawkTelephony: Poly, Yealink

Qualifications & Certifications

Currently Pursuing

Contact

Let’s talk. Open to travel and on-site roles. The fastest way to reach me is email.

✉ Email me
Email copied