Sr. VoIP Call Manager / (Call Manager ADMIN)

Vision IT; Los Angeles (CA); On-site; USD 120,000 - 160,000; Full time

Job summary

Vision IT is seeking a Sr. VoIP Call Manager / Mobile Systems Administrator to oversee Cisco UCM and mobile endpoints. You will install upgrades, perform backups, troubleshoot, and ensure high availability of VoIP services and mobile infrastructure.

The role requires strong hands-on experience with UCM and security-minded maintenance. Applicants should bring 5+ years in VoIP administration, proficiency with UCM, and endpoint management across software and hardware.

Qualifications

• 5+ years hands-on VoIP admin experience with Cisco UCM.
• Proficiency in VoIP, UCM configuration, and endpoint management (software and hardware).
• Strong troubleshooting skills in VoIP call management and mobile systems.
• Experience with system backups, recovery, and data integrity across critical infrastructure.
• Familiarity with network configurations for VoIP and mobile systems.

Responsibilities

• Install software releases and system upgrades for Cisco UCM; evaluate and install patches for stability.
• Perform backups and data recovery across server components; ensure data integrity.
• Maintain system configurations; monitor performance to prevent downtime.
• Create, configure, and maintain client endpoints within UCM for seamless communication.
• Troubleshoot endpoints (software and hardware) to ensure optimal functionality.
• Monitor configurations and logs; ensure continuous VoIP services and security.
• Patch regularly and perform system updates for performance and security.
• Collaborate with internal teams and customers to resolve VoIP and mobile system issues.
• Document configurations, patch updates, and troubleshooting steps.
• Prepare regular reports on system performance and issues for stakeholders.

Skills

VoIP administration

Cisco UCM

Mobile endpoints management

System backups & recovery

Troubleshooting

Tools

Cisco UCM configuration

Job description

At Vision IT, we put people first-our employees,their families and customers. As a Sr. VoIP Call Manager / Mobile (Systems Administrator), you will play a key role in ensuring the smooth operation and support of our Cisco Unified Communication Manager (UCM) and mobile systems. This hands-on technical role involves managing system upgrades, troubleshooting, and maintaining communication systems while providing high-quality service and ensuring system availability. Your expertise will directly impact our mission by ensuring the seamless operation of VoIP services, mobile endpoints, and other critical communication infrastructure.

Key Responsibilities

• Install new software releases and system upgrades for Cisco Unified Communication Manager (UCM), evaluating and installing patches to maintain system stability.
• Perform system backups and data recovery, ensuring data integrity across all server components.
• Maintain system configurations and monitor system performance to prevent downtime or failure.
• Create, configure, and maintain client endpoints within the UCM, ensuring smooth communication between software-defined and physical devices.
• Troubleshoot and resolve issues related to endpoints, both software-defined and physical, ensuring optimal functionality.

System Monitoring & Maintenance

• Continuously monitor system configurations and logs to ensure data integrity, prevent failures, and ensure continuous VoIP services.
• Conduct regular patching, system updates, and configuration changes to ensure optimal system performance and security.

Collaboration & Problem Resolution

• Work closely with internal teams and customers to address issues, providing technical support and solutions for any VoIP-related or mobile system concerns.
• Lead troubleshooting efforts for network and VoIP-related issues, collaborating with cross-functional teams to resolve problems efficiently.

Documentation & Reporting

• Maintain detailed records of system configurations, patch updates, and troubleshooting processes.
• Prepare regular reports on system performance, potential issues, and resolution steps for internal stakeholders.

Qualifications & Required Experience

• 5+ years of hands-on experience with VoIP administration, especially with Cisco Unified Communication Manager (UCM), and managing mobile systems.
• Proficiency in VoIP systems, UCM configuration, and endpoint management (both software-defined and physical).
• Strong troubleshooting skills and experience in resolving VoIP call management and mobile system issues.
• Solid experience in performing system backups, recovery, and ensuring the integrity of data across critical infrastructure systems.
• Familiarity with network configurations, including the ability to manage and maintain configurations for VoIP and mobile systems.
• Ability to monitor systems, perform updates, and implement patches to ensure the highest level of service availability.

Preferred Skills

• Certifications such as Cisco Certified Network Associate (CCNA) or Cisco Certified Network Professional (CCNP).
• Experience with mobile endpoint management and configuration.
• Familiarity with network security protocols and best practices for VoIP infrastructure.

Security Clearance

Secret or higher (must be eligible for DoD clearance).