We’re Hiring: Core Engineer (CS/PS/IMS)

We’re Hiring: Core Engineer (CS/PS/IMS) 📍 Location: Riyadh, Saudi Arabia 💼 Experience: 3+ Years We’re looking for an experienced Core Engineer with strong hands-on expertise in Ericsson CS/PS Core Networks, IMS Operations, and Network Troubleshooting to join our team. Key Responsibilities: Monitor, troubleshoot, and maintain CS, PS, and IMS Core Networks . Perform fault localization, incident recovery, and reactive maintenance within agreed SLAs. Troubleshoot configuration changes across MSC, MGW, HLR, HSS, STP, SBC, UDM, and IMS nodes. Support change management and Change Request (CR) implementation. Handle trouble tickets, escalations, and technical reporting. Coordinate with technical teams to improve network monitoring and operational efficiency. Ensure compliance with approved processes and operational best practices. Key Requirements: 3+ years of experience in Ericsson CS/PS Core troubleshooting. Strong hands-on experience in Voice Core O&M , including MSC, MGW, STP, UDC, and APG. Experience in L2 IMS Operations , including SBG, MTAS, CSCF, IPWorks, and EME. Excellent knowledge of SIP, H.248, SS7, ISUP, BICC, SIGTRAN, INAP, CAP, TCAP, MAP, SCCP, and Diameter . Solid understanding of 2G/3G/4G Core Network architecture, signaling, and call flows . Knowledge of Virtualization, Cloud NFVI, and NFVO . Bachelor s degree in Electrical, Communications, or Electronics Engineering. Hands-on Ericsson experience is mandatory. 📩 To apply, please send your CV to: omniaelshamy@sis.net.sa <div class="