System Administrator

Sigma Information Group, Inc.

. Manage technology infrastructures for multiple clients across various industries .

Posted 9/23/2026full-timeHouston • Texas • United StatesJuniorWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in managing technology infrastructures, deploying complex solutions, and maintaining client relationships. Proficient in troubleshooting technical issues and recommending technology solutions to enhance business processes.

Highest-signal resume keywords

IT Management ExperienceNetwork/System AdministrationMicrosoft Exchange KnowledgeVMware KnowledgeWindows Server Knowledge

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Network TechnologyWindows ServerSQL ServerActive DirectoryGroup PolicyFirewallsMicrosoft AzureOffice 365Amazon Web ServicesRemote Desktop Services

Soft Skills

Interpersonal CommunicationProblem-SolvingCustomer Service

Tools & Technologies

VMwareMicrosoft ExchangeWindows ServerFortinetPalo Alto

Industry Keywords

IT ConsultancyManaged Service ProviderLAN/WANTCP/IPDNSDHCPVPNSMTP

Tech Stack

Tools & technologies

AWSAzureDNSFirewallsSMTPSQLTCP/IPVMware

About the role

Key responsibilities & impact

Manage technology infrastructures for multiple clients across various industries
Deploy complex solutions involving Exchange, VMware, and Windows Server
Coordinate internal and external resources and vendors
Build new network and server environments
Manage, maintain, and upgrade existing servers, networks, and desktops
Maintain working relationships with multiple customers
Manage customer expectations and regularly communicate status updates to customer contacts
Understand customer business processes and goals
Recommend technology solutions to improve business processes or achieve customer goals
Solve complex technical problems, including software deployments, server and desktop hardware issues, and software problems
Support and maintain servers, desktops, firewalls, network equipment, software applications, and backup systems
Support multiple clients, projects, and deadlines while handling unexpected situations
Explain technical details to non-technical customers and provide professional client service

Requirements

What you’ll need

Bachelor's degree or 2-3 years of IT management experience
Minimum 1 year as a network/system administrator, IT manager or IT consultant
Prior experience handling multiple customers at an IT consultancy or MSP a big plus
Knowledge of common business operating systems and applications, including Windows, Windows Server and Office
Solid understanding of network technology and related concepts, such as LAN/WAN, TCP/IP, DNS, DHCP, VPN, SMTP, etc
Strong interpersonal communication skills, both written and verbal
Ability to interface professionally with customer executives and employees
Ability to see problems through to resolution and communicate progress and results to customers
Microsoft Exchange knowledge
VMware knowledge
Hyper-V knowledge
Remote Desktop Services knowledge
Windows Server knowledge
SQL Server knowledge
Firewalls knowledge, including Fortinet and Palo Alto
Active Directory knowledge
Group Policy knowledge
Client Operating Systems knowledge
Networking knowledge
Microsoft Azure knowledge
Office 365 knowledge
Amazon Web Services (AWS) knowledge
Must reside in the Houston, TX metropolitan area
Must be able to work on-site and remotely
Work authorization sponsorship question included in application

Benefits

Comp & perks

Medical, dental, and vision insurance
Life insurance
Long-term disability
Paid vacation
Paid holidays
Simple IRA for eligible employees
Stocked Snack Bar
Company-sponsored outings
Fitness center onsite
Hybrid work arrangement with on-site and remote work