Khalid Dekkar

About Khalid Dekkar

System Admin + Lab Engineering + NTAC + T‑Mobile)System Administration & Platform EngineeringLinux System Administrator with hands‑on experience across Ubuntu, CentOS, RHEL, and hardened enterprise environmentsSkilled in user/group management, permissions, SSH, cron, systemd, storage, LVM, networking, and secure configurationExperience supporting multi‑platform environments to meet T‑Mobile operational requirements, including cross‑domain troubleshooting across RAN, Core, IMS, and background in automation using Bash, Python, PowerShell, and Ansible‑based workflowsFamiliar with virtualization and lab infrastructure: VMware ESXi, KVM, Docker, containerized test environmentsNTAC Operations & Cross‑Domain TroubleshootingNTAC L2/L3 support across RAN, EPC/5GC, IMS, Transport, and multi‑vendor in incident response, KPI degradation analysis, RCA, and cross‑team coordinationExperience with Nokia NetAct, Ericsson ENM, MantaRay, Traffica, and OSS monitoringDeep understanding of T‑Mobile network behaviors, provisioning models, VoLTE/IMS profiles, and service‑layer dependenciesStrong ability to isolate issues across Device → RAN → Core → IMS → ApplicationLab Engineering & Wireless Test PlatformsExtensive lab experience validating 5G SA/NSA, LTE, VoLTE, VoWiFi, VoNR, RCS, UT/USSI, IR.92/IR.94**, and roaming (S8HR)Skilled in building, maintaining, and executing test plans in controlled lab environmentsHands‑on with major wireless simulators:Rohde & Schwarz: CMW500, CMW290, CMW270Keysight / Anite: SAS, Propsim, UXM 5G, Anite 8100, Landslide, VertexAnritsu: MD8475A, MD8480CAgilent: 8960 SeriesQualcomm: QXDM, QPST, PQAIXIA traffic generatorsExperience with UE automation, SIPp‑based automation, Wireshark, Debug Mux, and protocol analyzersProtocol & Call‑Flow ExpertiseExpert in 5G/LTE/IMS call flows across AT & T and T‑Mobile networksVoIP/IMS: SIP, SDP, RTP, MGCP, Megaco/H.248, DNS, TCAP, DIAMETERCore: GTPv2‑C, GTPv1‑C, GTP‑U, S1‑AP, NAS, NGAP, Xn, N2/N3Strong understanding of NAT, firewall traversal, proxy behavior, and routing impacts on

Experience

1. Ste V- Contractor

   Microsoft

   Oct 2014 — Present · Redmond, US

   Microsoft, WA Surface/Skills Inc Requirements according to 3gpp specifications. Testing involved many core chips design and many software releases. Product studio with expertise of EVDO, UMTS,LTE,CA) Experience on Automation Anritsu 8480c/8470, LTE Sequencer,R&S CMW500/CMUrun. Experience with protocol analyzers and able to analyze the performance or issues during lab testing, interoperability test and field trials. Utilized Spy Tracer Experience Firmware eUTRAN Validation Hands on experience in handling the test equipment in the vendor and customer’s lab.

Education

• .

  CSTE, CSTE

  1991 — 1992

• Institut Telecom

  Associate's degree, Information Technology

Skills

• Test Automation
• Jira
• Gsm
• Mac
• Charts
• Hp Quality Center
• Ss7
• Quality Assurance
• Wireless Technologies
• Software Documentation
• Mobile Devices
• Research
• Android
• Lte
• Manual Testing
• Evolved Packet Core
• Quality Center
• Tcp/Ip
• Testing
• Windows
• Software Development
• Cmd
• Unix
• Experience in Unix Linux & Windows Platforms.
• Umts
• Internet Protocol Suite (Tcp/Ip)
• 3gpp
• Universal Mobile Telecommunications System (Umts)
• Web Applications
• Wireless
• Troubleshooting
• Telecommunications
• Test Cases
• Software Quality Assurance