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Tier 3 Systems Engineer

Complete Computing Solutions
Location: Texarkana, Texas
Position Type: Full-Time, On-Site
Salary: $70,000–$85,000
Reports To: Operations Manager

About Complete Computing Solutions

Complete Computing Solutions is a growing managed IT services and cybersecurity company serving businesses throughout the Ark-La-Tex region. We provide managed IT, cybersecurity, Microsoft 365, cloud services, backup and disaster recovery, networking, and technical support to organizations that depend on technology to operate.

CCS was ranked #255 worldwide on the 2026 MSP 501 list, recognizing us as one of the leading managed service providers in the world.

Our standard is simple:

World-Class IT. Local Service.

Position Overview

Complete Computing Solutions is seeking an experienced Tier 3 Systems Engineer to serve as a senior technical resource supporting our managed services clients. This role focuses on resolving complex technical issues, serving as the highest level of escalation for the service desk, and assisting with infrastructure improvements across client environments.

The ideal candidate is a highly skilled engineer with extensive experience supporting Microsoft environments, networking, cloud services, cybersecurity solutions, and managed IT infrastructure. This position works closely with Tier 1 and Tier 2 technicians, project engineers, cybersecurity personnel, and the Operations Manager to ensure exceptional service delivery and technical excellence.

Key Responsibilities

Technical Responsibilities

• Serve as the primary escalation point for complex technical issues beyond Tier 1 and Tier 2 support.
• Troubleshoot advanced issues involving Windows Server, Microsoft 365, Active Directory, Azure, networking, firewalls, virtualization, backups, endpoint systems, and cybersecurity solutions.
• Diagnose and resolve complex infrastructure, connectivity, authentication, performance, and security issues.
• Participate in major incident response and critical client escalations.
• Perform advanced systems administration, maintenance, upgrades, and troubleshooting for client environments.
• Assist with server migrations, cloud migrations, Microsoft 365 implementations, and infrastructure projects.
• Review technical documentation and ensure solutions align with CCS standards and best practices.
• Collaborate with project engineers and cybersecurity personnel on client implementations and remediation efforts.
• Identify recurring technical issues and recommend long-term solutions to improve client environments.
• Assist with advanced service requests while maintaining excellent client communication and documentation.

Client Support

• Deliver exceptional customer service while resolving complex technical issues.
• Communicate professionally with clients regarding technical problems, recommendations, and resolution timelines.
• Maintain accurate ticket documentation, time entries, and technical notes.
• Ensure client environments are secure, stable, and well documented.
• Build trusted relationships with clients through professionalism, responsiveness, and technical expertise.

Team Collaboration

• Provide technical guidance and knowledge sharing to Tier 1 and Tier 2 technicians.
• Assist teammates with troubleshooting and technical problem-solving when needed.
• Collaborate with the Operations Manager and project teams to ensure smooth service delivery.
• Contribute to internal documentation, standard operating procedures, and technical knowledge bases.
• Support continuous improvement initiatives that enhance service quality and operational efficiency.

Required Qualifications

• Minimum of five years of professional IT support, systems administration, or infrastructure experience.
• Strong Tier 3 troubleshooting and systems administration skills.
• Experience supporting business clients in a managed service provider (MSP), IT services, or multi-client environment.
• Strong knowledge of Microsoft Windows desktop and server environments.
• Experience supporting Microsoft 365, Active Directory, Azure, networking, firewalls, backup platforms, endpoint security, virtualization, and remote management tools.
• Experience troubleshooting complex infrastructure and cloud environments.
• Ability to prioritize and manage multiple issues in a fast-paced service environment.
• Strong written and verbal communication skills.
• Professionalism, accountability, and a strong customer-service mindset.

Preferred Qualifications

• Experience with ConnectWise or another professional services automation (PSA) platform.
• Experience with SonicWall, Microsoft Azure, Huntress, SentinelOne, NinjaOne, VMware, Hyper-V, or similar technologies.
• Microsoft, CompTIA, Cisco, SonicWall, or cybersecurity certifications.
• Experience participating in infrastructure projects, cloud migrations, and security remediation efforts.

What Success Looks Like

A successful Tier 3 Systems Engineer will:

• Resolve complex technical issues efficiently and accurately.
• Serve as a dependable escalation resource for the service team.
• Maintain thorough documentation and high-quality technical work.
• Deliver outstanding client service and communication.
• Contribute to secure, stable, and reliable client environments.
• Share technical knowledge and help strengthen the overall capabilities of the service team.
• Identify opportunities to improve systems, processes, and client infrastructure.
• Build trusted relationships with clients through professionalism and expertise.

Ideal Candidate

The right candidate will:

• Enjoy solving challenging technical problems.
• Be organized and methodical when troubleshooting.
• Take ownership of issues and follow them through to resolution.
• Communicate clearly with both technical and non-technical users.
• Thrive in a collaborative, fast-paced MSP environment.
• Be committed to continuous learning and professional development.
• Maintain a strong focus on customer service and technical excellence.

Why Join CCS?

Join a nationally recognized MSP where you'll work alongside a talented team, solve challenging technical problems, and support a wide variety of business environments. CCS provides opportunities to expand your technical expertise, earn certifications, and grow your career while delivering world-class IT solutions with local service.

Schedule and After-Hours Expectations

This is a full-time, on-site position based in Texarkana. Regular and reliable in-office attendance is an essential function of the role.

Occasional after-hours availability is required for critical client incidents, maintenance, and emergency escalations. Any on-call rotation expectations will be discussed during the interview process.

Compensation and Benefits

• Salary of $70,000–$85,000, based on experience and qualifications.
• 401(k) with company matching.
• Health insurance.
• Vision insurance.
• Paid time off.
• Company-provided technology and tools.
• Professional development and certification opportunities.
• Opportunities for advancement as CCS continues to grow.

How to Apply

Please submit your résumé along with a brief explanation of:

• Your experience supporting complex Microsoft, networking, and cloud environments.
• Your experience working in a managed service provider or multi-client IT environment.
• A challenging technical issue you successfully resolved.
• Why you're interested in joining Complete Computing Solutions.

Complete Computing Solutions is an equal opportunity employer.

Work Location: In person

Complete Computing Solutions is a rapidly growing MSP in the Texarkana area. We have served the Texarkana and surrounding areas for over 20 years.