Our Team

Jason Sandefer- Owner/Tech

From Houston Texas, Jason and his family moved to Central Arkansas in 2010 and began 640Square as an IT Consulting firm to small businesses across Arkansas and his home state of Texas. The journey has led 640Square through IT projects of various complexities all across the country. But the core of what 640Square does is support the IT needs of small businesses from 1-100 employees. Jason helps keep it all together and makes sure the techs have what they need to be successful. In an ever changing and complex IT landscape Jason works to make sure all clients networks are running as efficiently as possible and that client data is safe. In addition to 20 years of industry experience, Jason has a degree in business and computer certifications from Microsoft and CompTIA. Jason is also in the midst of pursuing a Masters degree in IT management.

George B.- Lead Technician

George has over 20 years experience as an IT Administrator. Today he is a Tier 3 Network and Systems Administrator of Windows and Linux networks. On a daily basis he deals directly with customers, vendors, business executives, and staff. His expertise covers multiple technologies including Microsoft Windows 10 and Office 365, Windows Server including Active Directory and Domain Administration, and Ethernet and Wireless routing. If you run Windows, MacOS, or Linux he is ready to support it. As a Managed Service Provider his talents are an asset to our company and partners and he is a trusted member of our team.

Jeffrey Chin- Technician

Jeffrey Chin is a system administrator with over 10 years of experience in information technology. Jeffrey graduated from Azusa Pacific University in 2013 with a bachelor’s degree in Health sciences. He is skilled in server and network administration, virtualization, cloud technologies, and python programming. In his free time, Jeffrey loves spending time with his wife and daughters, taking photos of the stars, or tinkering around with his mini datacenter homelab.

– Windows (Desktop and Server)
– Linux (Fedora, CentOS)
– Virtualization (Hyper-V, ESXi)
– Cloud (AWS, Azure, OpenStack)
– Monitoring (Zabbix, New Relic, SolarWinds, SevOne)
– Development (Python, HTML/CSS, SQL, Git, BASH)

– AZ-900: Microsoft Certified Azure Fundamentals
– MTA: Software Development Fundamentals
– Microsoft Certified IT Professional: Enterprise Desktop Support Technician
– CompTIA A+

– Photography (https://500px.com/jeffreychin89)
– Videography (https://www.youtube.com/jeffreychin89)

Ricardo R.

Ricardo Rivero is a network and system’s administrator with over 15 years of experience in information technology. He graduated from Western Governors University in 2010 with a bachelor’s degree in Information Technology and recently got his Masters in IT Management in 2018. Ricardo is skilled in server and network administration, IT design architecture, project management, virtualization and cloud technologies. Even though he specializes in these, he still loves helping and providing tier 1,2 support for all related tech issues.

In his free time, Ricardo loves spending time with his wife and daughter, playing golf with friends and reading every week about technology to be always updated on the latest trends.

– Windows (Desktop and Server)
– Linux (Any Flavor)
– Virtualization (Hyper-V, VMware)
– Cloud (Azure, VMware Cloud)
– Monitoring (Darktrace, SolarWinds, Logic Monitoring )

– Microsoft Certified IT Professional
– CompTIA Security+
– CompTIA A+ CE
– CompTIA Network+
– CompTIA CIOS Operations Specialist
– CIW Database and Web Design Specialist