**MANTECH** seeks a motivated, career and customer-oriented **Telephony Engineer** to join our team in **McLean, VA.** In this role, you'll combine expertise in telephony systems, Linux server management, and software development, focusing on VoIP, analog, ISDN systems, and Ruby on Rails for telephony applications.

**Responsibilities include, but are not limited to:**

+ Design, develop, and maintain voice media gateways for VoIP, analog, and ISDN systems. Install, configure, and troubleshoot telephony hardware and media gateways across secure networks.
+ Leverage BESS Billing and Provisioning Tools to optimize telephony systems and ensure seamless service delivery.
+ Configure and maintain Linux servers (Ubuntu, CentOS) for hosting telephony and web applications, ensuring performance, security, and scalability. Develop and troubleshoot applications using PowerBuilder, Korn shell, and Ruby on Rails.
+ Integrate telephony systems (e.g., IVR, call routing) ...