Roy R. San Buenaventura
Block *** Lot ** Upper Azucena Street, Pembo, Makati City, Philippines 1218
+639********* (Sun) / +639********* (Globe) aczy0o@r.postjobfree.com
Electronics & Communications Engineer
SUMMARY
A Professional Electronics & Communications Engineer (in Philippines) with years of experience in Network
Administration, Commissioning, Integration, and Optimization of various mobile telecommunication projects. I involved
on big projects in LTE (4G), UMTS (3G), GSM/GPRS/EDGE (2G) PS Core network deployments and expansions with
major telco companies in both local and abroad.
A PS Core Network is an Internet Service Provider (ISP)-like in mobile communication we have today. It consists of two
major functions: The Radio part and the Bearer/Backbone part. The Radio is the one who manage the mobility function of
the network, giving a connection wirelessly to a mobile phone/equipment and take care the seamless handoff when mobile
moves from one geographical area to another. While the Bearer part is the physical network interface (IP based) that
provides connections to mobile phone/equipment to services like the Internet, VOIP, E-mail/Multimedia (SMS/MMS),
Billing, Network Management, and other customized IP Based services. The PS Core Network comprises of the following
Network Elements and Devices; For Radio part: MME/SGSN, Node-B, DNS, L2/L3 Switching/Routing Devices and Fiber
Transmission facilities for physical interfaces between MME/SGSN and Node-Bs. And the Bearer part: Serving
Gateway/PDN Gateway, L2/L3 Switching/Routing Devices, DNS, Firewalls, Load Balancer, Charging and Network
Management servers.
I'm fast learner, resourceful, attention to details. I'm always eager to learn new things and concepts to improve or develop
my works. I can stand longer to work on problems finding immediate solution or workaround. Able to work calmly on
under pressure situations. I can work with less to no supervision, but team effort goals and achievements always gives me
excitements and inspiration.
My Specialties: Network/System Administration, Commissioning, Integration and Optimization of Nokia Packet Core
Networks. End-to-End design and troubleshooting of Cisco Networking on LAN and WAN environments. Proficient in
System Administration of various Operating System environments and Server Applications from Microsoft, Apple, HP,
UNIX and well-known Linux OS distributions. I'm a PC and Technology enthusiast.
WORK EXPERIENCES
Bell Telecommunication Philippines, Inc. Mar Aug 2016
Telecom Consultant (2G/LTE Core/RAN Project)
Main interface of Commissioning, Integration, Site/User Acceptance Tests (SAT/UAT) and troubleshooting activities
between the equipment vendors and service companies as well as internal Network Planning Team for PS Core
Network Elements such as MME/SGSN, Serving Gateway/PDN Gateway, L2/L3 Switching & Routing Devices, Load
Balancer, DNS, Billing, Firewalls and Network Management servers.
Backup support for CS Core/RAN Network Elements such as MSS, MGW, HLR/HSS, PCS, eNB and BSC.
Assisted the Project Manager in the planning and support during implementation phase includes: coordinating and
managing connectivity requirements between network elements with different vendors (multivendor environment),
verifying connectivity plans from vendors and coordinating requirements with Core Transmission Planners, and
ensure plans are implemented with quality. Assists the Project Manager in the verification of installation plans made
by vendors prior to approval.
Bosch Service Solutions, Manila, Philippines Apr 2012 Feb 2016
Technical Support Specialist (Video over IP) / Technical Lead
Performed 1st and 2nd level technical support of Bosch IP Video Security (Surveillance) System products for 11
countries in Asia Pacific Region.
Analysed devices/server/network logs as part of troubleshooting to find solutions or workaround to the issues raised
by Country Sales Office (CSO) tech. support, certified partners and end-users.
Performed L2/L3 Switching & Routing design, and troubleshooting of IP Video Surveillance networks.
Handled System Administration related concerns for Windows Servers and Storage Servers as part of product
portfolio.
Acted as local consultant in any technical concerns during the setup of Bosch IP Teams (North America & Asia
Pacific Accounts).
Performed training and knowledge transfer to clients and colleagues.
Represented the team on international training and events.
Took care of the reports and performance statistics.
Represented/organized meetings.
ASTRONCAN Consulting Inc., Saskatchewan/Alberta, Canada Mar 2010 Mar 2011
Nokia Siemens Networks, Canada Account: Shaw Communications, Inc.
RELAY TELECOMMUNICATIONS LTD., Taipei, Taiwan May 2008 Jun 2009
Nokia Siemens Networks Ltd., Taiwan Account: Chunghwa Telecoms (CHT)
NETWORKERS INTERNATIONAL PLC, Taipei, Taiwan Mar Nov 2006
Nokia Siemens Networks Ltd., Taiwan Account: Taiwan Mobile Co. Ltd. (TCC/TWM)
Packet Switch (PS) Core Engineer
Performed commissioning, integration, SW upgrades, site acceptance test (SAT) for Nokia Siemens Networks
SGSN/MME and GGSN/Serving Gateway/PDN Gateway DX200 and ATCA HW Platforms.
Handled and support Cisco Routers/Switches and Check Point NG/NGX Firewalls related tasks such as IOS/software
upgrades, BGP/GRE/IPSec configurations, IP switching/routing, and rule policies/access lists (ACL) implementations.
Troubleshoot, tested and implemented Check Point Firewall NG/NGX with BGP/GRE/IPSec on ClusterXL, IP
Clustering and VRRP high-availability and load-sharing configurations for International/National MMS Roaming
Project.
Provided technical support (as Tier-2) to troubleshoot and resolve issues, escalations to Planners and Tier-3/Product
Line support teams.
Gathered and analyzed interfaces logs from Iu_PS, Gr/SIGTRAN, Gn and Gi as requirements for tests and
troubleshooting.
Coordinated to customer and inter-vendor team regarding all issues in PS Core network.
Attended and prepared procedures, reports and presentations for customer.
Discussed and shared knowledge/ideas with Project Managers, Planners, Third-party representatives, colleagues and
customers engineers.
SMART COMMUNICATIONS, INC., Manila, Philippines 2000 2006
Packet Switch (PS) Core Engineer/Team Leader
Administered and maintained 24/7 the SMART GPRS/EDGE PS Core Network Elements: SGSN, DNS, GGSN,
NAWG, Layer 7 Traffic Analyzers, Cisco IP Switches/Routers, Checkpoint Firewalls, Border Gateway (BGP) routers.
Maintained the PS Core network integrity on its interconnectivity to CS Domain (HLR/AUC), Charging/Billing, VAS
(WAP/MMS), Other GPRS Services (Internet/IMS-PoC/Corporate VPNs) and Local/International GPRS Roaming.
Handled subscribers/customers complaints in all GPRS related services and applied all possible solutions.
Coordinated all the Major/Critical system problem issues to Nokia technical support for second level maintenance thru
Nokia Online Helpdesk (NOLS).
Shared knowledge in my colleagues and gave overview in other teams regarding the PS Core system network
technologies, services and other work related issues.
International Gateway Facilities (IGF) Switch Engineer
Administered and maintained the SMART IGF/Toll Ericsson AXE 10 (APZ 212 20) Switch.
Implemented switch translations for routing, trunk creation/modification, and other switch related activities.
Conducted SS7 (Level 1-4) ITU-Compatibility tests for newly activated SS7 signalling links of international/national
circuits, and inter-office interconnections.
Resolved international roaming and STP links related problems, as well as international and domestic access call
problem issues and modifies switch routing database when necessary for call completion.
Coordinated with foreign counterparts and local carriers for the immediate solution of mobile call access problems.
PILIPINO TELEPHONE CORPORATION, Manila, Philippines 1999 2000
MSC Switch Engineer (AMPS/CDMA)
PAGING Switch Engineer/Team Leader (BEEPER150 Paging System)
Administered and maintained Lucent 5ESS and Motorola EMX 2500 Mobile Switching Center.
Administered and maintained AT&T, ECI, Philips and Siemens Fiber Transmission facilities.
Implemented switch work orders, and monitored and troubleshoots on faults/alarms detected that would indicate
service interruption or degrade system performance.
FUTURE LOGIC CORPORATION, Manila, Philippines 1999
Service Engineer
Field service of OMRON Cash Registers and POC System Products.
QUALIFICATIONS
Nokia Siemens Networks SGSN/MME and GGSN/Serving Gateway/PDN Gateway (ATCA/DX200 Platforms)
Nokia Siemens Networks CG (Charging Gateways)
Check Point FW NG/NGX on Nokia IP Security Platforms and SecurePlatform Pro (SPLAT Pro)
Cisco L2/L3 Switches and Routers, HP L3 Switches, F5 BIG-IP LTM configurations
LAN/WAN Protocols/Technologies: STP/RSTP/MSTP, RIP, EIGRP, OSPF, BGP, MPLS, VRF, GRE and DMVPN
Fiber Transmission Facilities: E1/T1, SS7, SDH, DWDM, DACS
NetHawk M5, Tektronix K12/K15 and Ethereal/Wireshark Protocol Analyzers
3GPP Release 7 signalling protocols analyzation (SIGTRAN, GTP, HSPA/HSPA+, Direct Tunnel, etc.)
UNIX shell scripting and Visual Basic 6 programming.
Bosch Video Surveillance (Video-over-IP) knowledge: H.264/MPEG-4, RTSP, RCP+ (Bosch proprietary control
protocol for video streaming), ONVIF, Alarm Task Scripting and Scheduling (some on C#), Windows Server,
VMware, Hyper-V and iSCSI storage systems.
Nokia IPSO/Voyager GUI, Sun Solaris, HP-UX, Red Hat Linux, Mac OSX, and Windows Server 2012
TRAININGS
Cisco Certified Network Professional (CCNP) Routing & Switching 300-1xx, Rivan IT Training Systems Corp.,
Manila, Philippines
Bosch Video System (Video-over-IP) Systems, Robert Bosch, Inc. (SEA) Pte. Ltd, Singapore
HP-UX System and Network Administration 2 (SNA-2), HP Education Center, Manila, Philippines
HP-UX System and Network Administration 1 (SNA-1), HP Education Center, Manila, Philippines
Circuit Switch (CS) Core Systems (Nokia MSC/VLR, HLR, Transit) (On-the-job Training), Smart Communications,
Inc., Manila, Philippines
SYSTRA (Global System for Mobile Communications), Smart Communications, Inc., Manila, Philippines
Telecoms Signalling, Wavetek Wandell Goltermann, PLDT Co., Manila, Philippines
Fiber Optics Basics, Wavetek Wandell Goltermann, PLDT Co., Manila, Philippines
Telecommunications Cadet Program, Pilipino Telephone Corporation (PILTEL), Manila, Philippines
EDUCATION
Bachelor of Science in Electronics and Communications Engineering (ECE), 1998
Rizal Technological University, Manila, Philippines
CERTIFICATIONS, LICENSES AND AFFILIATIONS
Cisco Certified Network Professional, CCNP Routing & Switching
Cisco Certified Network Associate, CCNA Routing & Switching
Licensed Electronics and Communications Engineer, Philippines, November 1998
Institute of Electronics and Communications Engineers of the Philippines (IECEP), Member
REFERENCES
Available upon request.