1. IMS Core Engineer
Olivier CAVAR 43 years old
Email : Olivier_cavar@yahoo.fr
Phone number: +33619601198
Nationality : French
KEY SKILLS :
Very strong troubleshooting skills for the core PS and CS network MSS, MGW, SDM, SBC, MGCF, MME,
SGW, PGW, IMS and TAS
Linux administration, OpenStack administration, SCTP/TCP/UDP/IP networking, including all aspects
of setup maintenance; skills in maintaining and troubleshooting the routers Cisco.
Excellent presentation and communication skills, including the ability to work in project teams as
well as working alone and communicating ideas and skills to other people. Strong skills in
problem solving. Willingness to learn new technologies.
Technical skills
Technologies Tools
GSM, UMTS, R8, VOLTE ; WIRESHARK, ETHEREAL, NETHAWK
GPRS, VOLTE, VOWIFI, VOIP ; TRAFFICA
IMS ; VISUAL BASIC, C/C++
Management Manufacturer
; MAINTENANCE TEAM ; NOKIA
; DEPLOYMENT TEAM ; ALCATEL
; CISCO CCNA
; NEC
; HUAWEI
; ORACLE

2. Expertise
• Very strong working experience on troubleshooting Nokia MSS(ATCA), MGWs (ATCA), NT-HLR,
HSS(One-NDS), SGSN, DNS, MME, PGW, S-CSCF, IN and TAS
Good understanding of the IMS related 3GPP specifications
Good knowledge of IMS related protocols, network & system components;
Knows the VoLTE, VoWifi and VOIP architecture in detail.
Expertise of surrounding networks & network components (2G, 3G, 4G, Release 8 mobile architecture,
IN) and related services
Understanding in QoS / policy control configuration
• Good working knowledge of integrating/troubleshooting IP back bone
•Good working knowledge on call routing, signaling on both user & control plane
•Act as dedicated expert for advanced Care consultancy and support, both for customer account teams
and for customers, provide technical leadership to large and/or complex e2e projects or troubleshooting
cases.
• Provide advanced technical support and troubleshooting/fault localization within several competence
areas and Multi-Vendor Interface
•Lead and provide consultancy during complex Care activities such as SW change planning, Expert
Support Services, SW upgrades, technical audits and SWAPs or migrations.
•Implement parameters in systems level, understands KPI and is capable to improve the performance of
the system
•Proactive knowledge sharer role, Technical guidance and support of other team members to avoid
problems before they occur, Information sharing and competence transfer, proven presentation and
training skills
Education
2000 Master Engineer Electronic option TELECOM (CNAM)
1995 DUT Electric (university CACHAN)

3. Trainings
2016 A-I-SBC Oracle
2016 HLR,HSS MNP, EIR (One-NDS) NSN Nokia
2016 Open MSS, MGW Nokia
2014 IMS (CFX 5000) and PCRF (PCS 5000) Nokia University
2012 HSS(One-NDS) Nokia University
2012 LTE NSN
NSN University
2009 Release 4 and IMS NSN NSN University
2006
NGN level 1
Alcatel University
2005
Protocols SIP, SCTP, MAP, RANAP, BSSAP,
CAMEL, IN-CS1 Alcatel University
2004
PS core network level 1 and level 2 (GPRS)
Alcatel University
2001
NSS level 1 and level 2 on the RCP, HLR
products
Alcatel University
2001 MSC HC3.1 level 1 Alcatel University

4. 10/2016 -12/2016 IMS core engineer
Customer: Bouygues Telecom under the responsibility of stanislas.gogo@boyuguestelecom.fr
Core IMS a Manager – responsible of the Core design department.
Employed within the study of an IMS RFQ for Volte, VoWifi and VoIP (Fix)
Project – RFQ IMS (cloud); vendors Nokia, Ericsson, Capgemini, Huawei and KCC
; Analysing suppliers’ answers during the Request for Quotation (RfQ) phase & evaluating
suppliers’ solutions
; Excellent understanding of the Volte, VoWifi and VoIP call flows
; Very good understanding of the cloud architecture (work currently with Openstack)
01/2016 -09/2016 Core Senior engineer IMS and CS
Customer: Three UK under the responsibility of liam.bookey@three.co.uk Core IMS and CS
Manager – responsible of the Core CS, IMS, SDM and FEMTO part.
Employed within operations to provide second line support maintenance of the current core
CS and IMS network.
Project – maintenance of the core CS and IMS network
; Very strong working experience on troubleshooting of the Rel4 Nokia MSS, MGW (DX200, IPA,
ATCA), CDS , and SDM Nokia (HSS, HLR, MNP and EIR) and Oracle SBC
; Good working experience on troubleshooting of the MME, E-I-P-CSCF SAMSUNG and Mitel TAS
; Very good understanding of the Volte and VoWifi call flows

5. 07/2014 -12/2015 LTE Core Technical Lead
Customer: NOKIA under the responsibility of martyn.everett@nsn.com Core Program Manager
– responsible of the Core PS, CS and SDM part.
Employed within operations to provide technical support during the merge of :
Three Ireland Network and O2 Ireland Network- in Dublin, (CS PS core and IN servers)
Project1 – LTE national Roaming
The goal of the project is the implementation of LTE roaming for O2 subscribers into Three Ireland’s 4G
networks.
; Prepare the solution document “High Level Solution Design Reference for 3ROI LTE Roaming for
O2 Subs” which outlines the design for impacted systems in Three UK and 3ROI and O2
Networks domains (End to End solution)
; Prepare the solution document “Testing Strategy for LTE”
; Prepare all the test use cases for the PS, CS Core and IN : elements involved ; MME, SGSN,
SAE-GW, HSS, HLR (One-NDS), Radius server, OCS, IN platforms, ATCA MSS, ATCA MGW …
; Perform the testing and troubleshooting of the MME, SGW, PGW, HSS, MSS, MGW, in the Lab.
; Interface with the project manager to ensure the efficient migration (or deployment) of the network
to meet the given deadlines
; Audit the High Level Design, Low Level Design documents for O2 LTE
; Support the implementation work order by auditing the data-build delivery from NSN
; Support the implementation of the CS Fallback (LTE) and PS (SGSN, HSS)
; Support the troubleshooting of the following equipment ATCA MSS M16, ATCA U50 MGW, NT-
HLR &HSS NSN, SGSN, MME, SGW, PGW, DNS during the rollout of the CS and PS network
Project2 – Golden Cluster and Core consolidation
During core consolidation, THREE will replace the existing O2’s core. During and after the swap, all the
services that the O2 subscribers can access today while in their home network must remain accessible.
; Prepare Mapping of services from Ericsson to Nokia Equipments. (MSS, HLR and IN)
; Prepare all the Use cases CS, PS
; Participate of the testing and troubleshooting of the use cases in the Lab.

6. 08/2012 -06/2014 Core IMS CS designer
Customer: TELIASONERA OPERATOR under the responsibility of
Klaus.makelainen@teliasonera.com Chief Network Specialist – responsible of the System and
Development department.
Employed within operations to provide technical support during the modernization of the
TeliaSonera Network in Finland, Sweden and Norway (CS core, IN AS servers, MRF, VMS
modernization)
Project1 – IN modernization in TS Finland:
; prepare the strategy for migrating the complete VAS platform (elements involved, MSS,
FE(s),BE(s) NT-HLR & IN, MNP data-base, MRF, IP backbone)
; Interface with the project manager to ensure the efficient migration of the network to meet the
given deadlines
; Prepare the High Level Design, Low Level Design documents for the VAS services
Project2 – Core CS modernization in TS Finland:
; Support the migration implementation by auditing the data-build delivery from NSN
; Support the implementation of the CS Fallback (LTE)
; Support the troubleshooting of the following equipment ATCA MSS M16, U5 MGW, NT-HLR &HSS
NSN, SGSN during the rollout of Core CS network
; Prepare the Low Level Design document for the IN services
Project3 – Common IVR modernization:
; Pre-study phase DP2– define the architecture in order to integrate the Common IVR in 3 different
countries
; Vendor involved for delivering the MRF ; Convergys
; Vendor involved for delivering the SIP ; Huawei, Ericsson, NSN
; Challenge the vendor solution by comparing the interfaces and features specifications based on
the 3GPP and RFCs specification
; Prepare the High Level Design document for the MRF services
Project3 - Mobile office in TS Norway:
; Pre-study phase DP2–DP3 - Prepare the IMS architecture in order to integrate the Broadsoft AS
servers
; Analysing suppliers’ answers during the Request for Quotation (RfQ) phase & evaluating
suppliers’ solutions
; Prepare High Level Design (HLD) phase & Low Level Design(LLD) phase
; Support of solving interoperability issues between various IMS components

7. ; Verification of IMS network element configuration (Broadsoft)
; Vendors involved in Norway for delivering the S-CSCF, MGCF, HSS and TAS ; Huawei, Broadsoft
; Challenge the vendors solutions by comparing the interfaces and features specifications based on
the 3GPP and RFCs specification
; Implementation of the Mobile office Solution (SIP interfaces towards the S-CSCF, MGCF, MRF
and TAS);
03/2011 -07/2012 Core CS, PS rollout manager
Customer: TANGO OPERATOR under the responsibility of Thierry.turus@tangoservices.lu
Employed within operations to provide management support during the rollout of the Nokia
core network on the Luxembourg Release4 project (Pooling concept).
; prepare the migration plan and strategies for migrating the complete CS and PS network
; Support the migration implementation by auditing the data delivery from the Nokia equipment
; Interface with the project manager to ensure the efficient migration of the network to meet the
given deadlines
; Troubleshooting on the ATCA MSS M16, U5 MGW, NT-HLR NSN, SGSN
; Prepare the documents (Low Level Design, High Level Design) and tools for migrating all network
elements to R4 core NSN such as; PSTN, PLMN, RNCs Huawei and NSN, BSCs Huawei , PBX,
and OLCM.
; Migration to the new IN SYMSOFT platform ; from INAP Ericsson to Camel phase 2& 4 (elements
involved, MSS, FE(s),BE(s) NT-HLR & IN, MNP database, IP backbone)
08/2009 -02/2011 Core R4 rollout manager
Customer: NSN Czech Republic under the responsibility of artur.jamnicky@nsn.com
Employed within operations to provide management support during the rollout of the Nokia
core network on the T-Mobile CZ Release4 project (Pooling concept).
; prepare the migration plan and strategies for migrating the complete network R99 to R4
; Support the migration implementation by auditing the data delivery of the NSN equipment and
RANs Huawei
; Interface with the project manager to ensure the efficient migration of the network to meet the
given deadlines

8. ; Prepare the documents (Low Level Design, High Level Design) and tools for migrating all network
elements to R4 core NSN such as; PSTN, PLMN, RNCs Huawei and NSN, BSCs Huawei , PBX,
and OLCM.
; IN platform migration, implementation in the MSS of the Camel phase 2, (& camel phase 3)
06/2007 -07/2009 R4 Core engineer
Customer: NOKIA PARIS France under the responsibility of Stephane.germaine@nsn.com
Employed within operations to provide second line support of the rollout of the Nokia core
network during the SFR Release4 project (Rollout of 21 million subscribers).
; Very strong working experience on troubleshooting Rel 4 Nokia MSS (DX200), CDS & MGWs
(IPA2800)
; Good working knowledge of integrating/troubleshooting ESB/ESA cards to IP back bone
; Good working knowledge on call routing, signaling on both user & control plane
; Act as dedicated expert for advanced Care consultancy and support; provide technical to a large
and/or complex end-to-end projects or troubleshooting cases.
; Network expansion activities up to multi-interface level.
; Provide advanced technical support and troubleshooting/fault localization within several
competence areas and Multi-Vendor Interface
; Lead and provide consultancy during complex Care activities such as SW change planning,
Expert Support Services, SW upgrades M14 and U4, technical audits and SWAPs or migrations
rehoming RNC BSC PSTN SMSC SCP.
; Responsible of the implementation and development of the MSS resiliency (French pooling
solution).
; Implement parameters in systems level, understands KPI and is capable to improve the
performance of the system

9. …
01/2004 – 05/2007
FIELD TECHNICAL MANAGER
S
Customer ALCATEL C.I.T/MND Lannion under the responsibility of Eric Jacob
Country : ALGERIA
Operator : ORASCOM TELECOM (Rollout of 20 million subscribers)
Field Technical manager:
Manage the teams maintenance and deployment (20 persons managed)
1/2003 – 12/2003 PROJECT MANAGER STRATHOM CONSULTANT
Customer: ALCATEL C.I.T/MND Lannion under the responsibility of Eric Jacob
COUNTRY: TANZANIA
Operator: CELTEL (1 million subscriber)
Ensure the communication between the back office Alcatel and the customer CELTEL.
local responsible of :
the delivery Alcatel equipment (power, IN platform, MSC, VLR, DAM & HLR),
the maintenance, deployment equipment which occurred on the network.
Prospect the new needs services from the customer.

10. 3/2002 - 12/2002
ENGINEER NSS
DEPLOYMENT &
MAINTENANCE
STRATHOM CONSULTANT
Customer: ALCATEL C.I.T/MND Lannion France under the responsibility of Eric Jacob
Country : GUINNEA CONAKRY
Operator: SONATEL
Extension of 50000 subscribers on a RCX MSC
Migration of a IN platform using CAMEL protocol
Installation of announcement server.
.
1/2001 - 2/2002
ENGINEER NSS 2G, 3G ON
THE ALCATEL PRODUCT
(FRANCE)
DATUS CONSULTANT
Customer : ALCATEL C.I.T/MND VELIZY France under the responsibility of Didier prevost
Engineer NSS in the team maintenance level 2:
maintenance Alcatel NSS level 2 on products RCP, HLR
reproduction of problems which occurred in different operators throughout the world
installation of internal traces in the system, RCP - HLR, production & implementation of
patches
After validation, integration of patches and test traffic on the machines, RCP and HLR - final
delivery to the customer.
4/1998 - 12/2000
TECHNICIAN IN THE
VALIDATION NSS 2G ON
ALCATEL AND ERICSSON
PRODUCT
FRANCE
TELECOM/BD/FTR&D/DMR/RMO
FRANCE TELECOM/BD/FTR&D/DMR/RMO under the responsibility of Robert Mitu
Validation NSS ALCATEL and Ericsson (Orange network):
development of the test plans starting from recommendations GSM and of the technical
specifications
participation in the validations of the MSC VLR AXE10, MSC (E10) VLR (RCP A8360), HLR
A8360
IN (Intelligent Network) platform on the ALCATEL product.
installation and customization of an IN ALCATEL platform working on the Linux platform
(Linux administration, TCP/IP networking including all aspects setup maintenance)
Validation of the IN services short N° service, service IREG, service SAFA, service MPS
11/1996 – 03/1998
CELLULAR COMMISSIONER
OF NETWORK GSM
FRANCE TELECOM
MOBILE/PERISUD/DOD
FRANCE TELECOM MOBILE/PERISUD/DOD under the responsibility of Robert MITU

11. Cellular commissioner of network GSM:
Deployment of network ITINERIS :
Positioning of the sites in according to the geographical relief
Optimization of the radio parameters sites in according to a plan of frequencies and analyze of the real traffic
load on the BTS.
(The tool or the calculator used allowing the optimisation worked over UNIX platform)