Diego Rojas

Background

About Diego Rojas

Telecom Network Engineer | Large-Scale Network Infrastructure | 14+ Years of Experience I am a Telecom Network Engineer with over 14 years of experience in designing, implementing, and maintaining large-scale network infrastructures, including data centers and Cellular Switch Centers (CSCs) for a cellular operator serving over 30 million subscribers. My expertise spans Cellular Core Networks (CS, PS, & EPC), Value-Added Services (VAS) platforms, Backbone IP, Radio Access Networks (RAN), and transport networks (SDH, DWDM, Satellite). Background in project management, and network security. I have a track record of collaborating with cross-functional teams and vendors to ensure optimal network operations, delivering scalable and reliable solutions for mission-critical environments. My hands-on experience includes network design, implementation, monitoring, and troubleshooting, with a strong focus on ensuring high availability and performance. Key Skills & Expertise: Networking & Protocols: LAN/WAN, TCP/IP, Ethernet, VLANs, STP, EtherChannel, OSPF, DHCP, DNS, routing, switching. Network Security: Firewalls (Check Point R75, Cisco ASA IOS 9.16), remote access VPNs. Network Monitoring & Management: PRTG, Zabbix, Nagios, SolarWinds, SNMPv3, Wireshark, Tcpdump. Cellular Core Networks: HLR/HSS, MSS/MME, MGW, SGSN/GGSN, STP, SGW/PGW, BSCs, RNCs, VAS (VMS, SMSC, USSD), EPC Core. Transmission Systems: Satellite, RF systems, spectrum management, fiber & microwave (SDH, DWDM). Virtualization & IT Infrastructure: VMware, Hyper-V, Dell Servers, Huawei iDrac, Windows Server, Linux (CentOS, RedHat, Ubuntu). Career Highlights: Designed and implemented network infrastructure in virtual and on-premises environments as a Network Lab Manager at Graphical Networks LLC. Delivered technical training on RAN, Core CS/PS/EPC, and LTE (VoLTE) as a Trainer Engineer for mobile network operators across Latin America and the Caribbean. Conducted preventive and corrective maintenance on Core Network Elements, Cellular Controllers, Backbone IP, and VAS platforms, Managed firewall rules and policies, and administered Mobile Switching Centers (MSCs), including data center and IT infrastructure. Provided first-tier on-site support for transmission equipment, including satellite backhaul operations, as an Operation and Maintenance Engineer at América Móvil – Claro. I hold a Bachelor’s Degree in Electrical Engineering and an AA in Cloud Computing and Networking Technology, along with certifications from industry leaders like Nokia, Huawei, Cisco, and CheckPoint.