Thomas Hammann Email & Phone Number

North Rhine-Westphalia, Germany

Nürnberg Und Umgebung, Deutschland

In my role as Squad Lead & Product Owner UNI-SBC I am leading a Team of Engineering, Validation and Operation Experts for the Systems P-CSCF, IMS-AGW according to the motto Fixed Mobile Convergence (FMC). My responsibilities:Technical LeadershipSupport Systems Engineering, System Design, Validation and TroubleshootingOverarching E2E Plattform Analysis in the IMS and Packet Core DomainAgile Project Management (Scrum, Kanban)Securing cost-effectiveness and stability of the SystemsIncreasing value added of the SystemsDesign of Product Roadmap with Product BacklogRequirements Management for the Cloudification Budget Management

Bonn Und Umgebung, Deutschland

In my role as Squad Lead IMS Mobile Access I am leading a Team of Engineering, Validation and Operation Experts for the Systems P-CSCF, IMS-GW and I-SBC with following responsibilities:Technical LeadershipSupport System Design and troubleshootingAgile Project Management (Scrum, Kanban)Securing cost-effectiveness and stability of the SystemsIncreasing value added of the SystemsDesign of Product Roadmap with Product Backlog Budget and Requirements Management

Bonn

IMS Systems Engineering for the P-CSCF and IMS-AGW in Fixed and Mobile Networks. This role contains following responsibilities: Lifecycle Management of Hardware and Software (Release Management)Detailed Analysis of System Requirements (SoC Lists)Technical Management of System qualificationsSupport of IMS Plattform Engineering/Design and E2E Design Validation & TroubleshootingScript development for SIP Message Manipulation (SMM)Lead for the System configurationDefinition of test catalogues, support for acceptance tests and Release ManagementVendor Management and Feasibility Studies for new System requirementsStrategic Alignment (world market, future developments)

Munich

Senior Consultant for OpenStack based Cloud Computing and IP Multimedia Subsystem (IMS) with following tasks:Introduction of Docker and ContainerizationAutomation of IT infrastructure with ChefDeployment and provisioning of Tap-as-a-Service as new port mirroring concept in the area of Software Defined Networks (SDN) with OpenStack Troubleshooting of Open vSwitch based OpenStack Neutron Networks and installation of Open Contrail as SDN solution.Technical Trainer for the Architecture of IMS and E2E Call FlowsSupport for E2E Troubleshooting of VoLTE Services

Munich

Performing of E2E Verification Tests for following IMS based VoIP services: CSFB, VoLTE, VoWiFi, PS Mobility, SRVCC, eSRVCC, midcall eSRVCC, alert eSRVCC and conference callsLeadership role as technical trainer for the development and execution of expert trainings for the VoLTE, VoWiFi and SRVCC System Architecture, used Protocols and E2E Call FlowsTechnical lead for implementation of the VoWiFi test infrastructure as a new service used for the Mobile World Congress MWC15 (Star Awards CS) Installation of a virtualized test environment for Software Defined Networking, OpenDaylight, OpenFlow, Open vSwitch and OpenStack Neutron NetworkingExpertise with Cloud technology infrastructure based on Red Hat OpenStack & VMware vSphere ESXi 5.5Installing and configuration of Qualcomm Snapdragon Mobile Processor and Chipset Family (MSM8960, MSM8974AB, MSM8994) used as mobile terminal for VoLTE/VoWiFi/SRVCC/SMS-over-IP (GSMA IR.92/IR.94)Deep expertise with LTE Core Network, related interfaces and used Protocol Suites (S1AP, GTP, IP, SIP, RTP, RTCP, SIP, DIAMETER) PCRF and IMS expertise of System Architecture for VoLTE, VoWiFi and SRVCCTechnical lead for the preparation and execution of demos for internationalcustomerProject support of pilot customer for VoLTE and VoWiFiSite Connectivity Tests of OSPFv2/BFD based networks with Flexi NG and Juniper EX4500

Technical Product Support for IP Gateway products Flexi ISN and Flexi NG in GPRS/UMTS and LTE networksTroubleshooting of high prior customer fault reports including tests of the software correctionsDevelopment and execution of product trainings for new technics as QoS in LTE, IPv6, Dual Stack, Policy Control Solutions and IP packet classification of Internet protocols (UDP, TCP, HTTP, WAP1.x, RTSP, RTP and P2P)Several weeks lasting global job assignments for pilot acceptance and technical crises in South Africa, Venezuela, Australia and IndiaPreparation of acceptance manuals for complex networking solutionsTechnical lead for the preparation and execution of customer benchmark testsAcquisition of functional tests to support the agile software developmentPerformance optimization of mobile broadband networksExpertise with Prepaid charging methodology including the used protocols as Diameter and RadiusDeep knowledge in Content based pricing techniques for Internet protocols as TCP/UDP/HTTP/WAP1.x/VoIP//RTP/RTSP etc. (Service Awareness and Deep Packet Inspection))Expertise in E2E QoS Management and Policy Control SolutionsExpertise in IPv6 and Dual Stack Solutions in Mobile BroadbandOperation & Maintenance of LAN InfrastructureGlobal Level 3 Emergency Service 24h/day for the Flexi ISN

Technical Product Support for GPRS/UMTS switching systems SGSNDeep understanding in GPRS/UMTS’Network Elements and related interfaces as Iu/Gb/Gr/Gs/Gn/Gp and the used protocolsExecution of functional software tests for quality assurance Diagnostics of customer trouble reports for Mobility Management related functionsProduct trainer for Service departments in Shanghai, Bangkok and MunichSeveral month lasting contribution for Function Software Level testing for Mobility Management related functions at Research & DevelopmentGlobal Level 3 Emergency Service 24/day for the SGSN in GPRS/UMTS networks

Cooperation System Verification and Software Management at Research & Development

TAC3 GPRS/UMTS for Vodafone D2, Germany

Graduate Electrical Engineer, Communications Engineering

Graduate Electrical Engineer