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Gorge Disusa
Senior Engineering Professional
An
engineering leader in the strategic and tactical implementation of complex
systems and operations support processes; maintains a wide breadth of expertise
in network architecture, core development, verification, deployment and 24x7
support, including all aspects of the product life cycle. Extensive knowledge of system architecture,
telecom and IP networks. Skilled in Unix/Linux administration, SQL, Windows
Server, switches and firewalls. Strengths include solution archictecure,
design, technology decisions, trouble-shooting, issue resolution, and system
integration in complex environments. A
committed career professional that excels in cross-functional, multi-platform
development, integration and support roles; self-motivated, driven by
innovation and thriving on challenges.
HIGHLIGHTS
· Build-out
of large-scale video broadcast networks accross multiple data centers
· Architect
for video collaboration applications utilizing Service Oriented Architecture
and Software as a Service concepts
· Technical
leader for development of integrated wireless services in 3GPP MSC/SCF (CAMEL)
· Technical
lead for design, development and execution of MCI PrePaid Calling Card Service
AREAS OF EXPERTISE
Verification
Strategy and Practice ž Technical Architecture
and Solution Design ž Telecommunication
Networks & Protocols ž Linux
Configuration & Administration ž Windows Server Administration ž Problem
Determination & Resolution ž Resource Management & Team Leadership ž Service & Process Development ž Web Design & Hosting ž Web Servers (IIS/Apache)
ž Shell
Scripting
PROFESSIONAL EXPERIENCE
ERICSSON, INC. July 2009 – Feb 2012
SYSTEMS
INTEGRATION CONSULTANT
Sprint’s PTT Service, Network
Integrator
· System
Administrator for RHEL 5.0 for new network hardware (IBM Blade Center), 300+
blades across 6 datacenters
· Support
cut-over to new network, responsible for pre and post test for one of 6 regions
· Configure
routing for network interfaces, VLAN, routing tables, firewall, etc
· Configure
and document VPN network for CALEA
· QA
engineer for new release of QHAT (PTT) service, hardware platform and
application software
· Handset
feature test using Motorola Droid, Kyocera
· Field
test new and existing features, trouble-shoot and write problem reports as
necessary.
· Work
with Qualacom engineers to identify root cause
· Work
with Sprint management and technical staff to prioritize issues
· Install
and configure Netbackup on selected nodes
· Extensive
use of shell scripting to build tools, push configuration data, monitor cut-over
progress, etc.
Sprint’s PTT Service,
Decommission Project Manager
· Technical
Project Manager for decommission of datacenter equipment
· Provided
detailed documentation of equipment to be decommissioned and removed
· Liaison
for various groups to ensure alarms, billing reports and data pulls are turned
off or otherwise deactivated
· Executed
data center site surveys
· Collaborated
with installation engineers and technical managers for equipment verifications
and decommission procedure reviews
Globalstar IMS , Solution
Architect/Network Engineer
· Solution Archictect, IP
design for IMS System. IMS supported interfaces with GSM/GPRS and SS7 (MGw)
networks
· Confiigure
networks OSS and CDN using logical separation, IMS node IP assignment, VLAN
definition/assignment, virtual router (VR) and definition of firewall rules on
Cisco router, firewall and Extreme Network switch
· Worked
directly with client to define and implment QoS for routing between datacenters
· Used IP
bonding, RIP, OSPF and link aggreagation techiques for network redundancy
· Configure
geo-redundant routing for fail-over situation, involving switch, router and
firewall design and configuration
· Followed
solution through implementation phase, Network
Engineer
· Configure
switch ports, VLAN, and routing on Extreme Network switches
· Configure
and test SBG (Session Border Gateway) node
· Integration
test using SIP client simulators, SOAP UI,
protocol analyzers
· System
Administrator for Sun-Oracle Blade Centers
· Configuration
of ILOM for SNMP groups, alarms and OSS access
· Configure
and install Virtual Machines for IMS nodes
· Installed
applications for IMS nodes, Unified Messaging and CSCF
· Performed
Acceptance Testing and Verification
· Equipment
and protocols, Sun-Oracle Blade Center, Extreme Switch, F5 Load Balancer, Cisco
Router and Firewall, Terminal Server, GSM, GPRS, TCP/IP, HSS, CSCF, SBG, MGw,
MMS, RADIUS, VMware
ESPRE SOLUTIONS,
INC. Nov 2004 – June 2009
· Designed
and constructed the verification lab, established team and defined processes
· Led the
application development team and managed all IT functions, internal and
external
· Automated
test suites in a web application format allowing code to be tested from
multiple end-client configurations
· Less-technical
duties included defining budgets, forecasting resource needs, managing teams
(local and offshore), and interacting with customers to define application
requirements
Network Operations
· Deployed
and supported network nodes delivering high quality, live streaming video
· Automated
processes via scripts to deploy proprietary software to public facing servers
· Managed
all internal network infrastructure; email, corporate web, DNS, DHCP, Cisco
switches, VLAN’s for traffic separation, and Cisco firewall
· Archictect
for video delivery network
· Deployed
100+ servers to support large-scale, live video broadcast events in
geographically distributed data centers
· Incorporated
use of virtualization (VMware) to maximize investment and resources
· Configured
and maintained server monitoring system to alert network staff of potential
problems; aiding in network growth planning
· System
administrator for Linux and Windows Server 2003
Software Development – Web Applications
· Led software
development team to produce video collaboration web applications
· Web applications
incorporated use of XMPP (presence and messaging), conference time and
participatant limits, multiple layouts and auto-sizing video windows, document
sharing, video conference setup and invitation features, et. al.
· Project
management of software design life cycle, time, resources, cost, etc
· Developed
applications that included video capture and video library management, live
video streaming, and video conferencing
· Developed
core software API’s, for simplified use within web applications; Core javascript
API’s were accessed by other 3rd party developers to add video streaming
capailities their new/existing web applications
· Designed
XML-based RESTFUL interface for administration of video conferences;
add/change/delete/modify
· Trouble-shooting
at all levels of the system – user equipment, application, api, core software,
and network
· Defined
resource requirements, technologies used, configuration of application servers
and video broadcast servers
Test and Support Group
· Staffed
the verification group and led development of processes for test case
definition and reporting issues
· Defined/documented
test cases for API’s
· Developed
test driver web applications for javascript API’s
· Designed
automation system to execute test suites from multiple end-client configurations
· Managed
the following areas: test lab, bug tracking, test case documentation, feature
testing/tracking, regression testing, application and API level testing (C++,
Javascript)
· Project
management of test activities, scope creep, resources onsite and offshore
· Execution
of test cases for C++, JAVA, and Javscript API’s
· Built
and automated test suites for regression and new feature testing (Javascript
API’s)
· Software
configuration manager using SVN (open source)
· Provided
front-line support of customer applications
ERICSSON, INC. June 2004 – Nov 2004
TELECOM
CONSULTANT
· Supported
telecom services for Cingular and other European Mobile Wireless Telco
providers
· Developed
and integrated new features for wireless PrePaid services
· Protocols
used CAMEL, IN2.0, SS7
NORTEL
NETWORKS CORPORATION Apr 2004 – June 2004
TELECOM
CONSULTANT
· Developed
and executed test cases for wireless networks
· Verified
call handling accuracy across Media Gateways, MSC’s and PSTN
· Worked
with H.248, ISUP, and IP for transport; MAP, DTAP, CAMEL, SS7 for signaling
MCI, INC. Aug 2003 – Feb 2004
TELECOM
CONSULTANT
· Designed
and developed new features to enhance existing PrePaid Calling Card service
· Supported
production systems for new releases and documented problem reports
· Developed
tools using shell, Perl, Unix admin, and other proprietary tools
SONUS
NETWORKS, INC. June 2003 – Aug 2003
NETWORK CONSULTANT
· Improving
test suites; Working to ensure code coverage with extensive test case
development
· Automate
test suites, building test efforts specific to each client’s product
application
· Defined
generic switch translations to provide baseline tests for point releases
SAMSUNG
TELECOMMUNICATIONS AMERICA Jan 2000 – Oct 2002
SERVICE
ARCHITECT, CONSULTANT
· Technical
lead/project manager in global service development environment for 3GPP and
SoftSwitch networks
· Designed
services (using JAVA) to interact with mobile handset stations
· Provided
implementation guidance and general support for engineering staff; interfaced
with product development and outsourced design groups
· Managed development team of 14 engineers
in Korea and 4 in the US
· Coordinated service development
activities to correspond with Call Processing, the Service Creation Environment
and Service Control Function schedules
· Collaborated
with the feature requirements group to define service requirements
· Analyzed
services and aligned with proper network nodes, defined new functions and/or
equipment needed
· Partnered
with the call-processing group to define the interface between SCF and CCF/SSF
· Designed
and implemented services with a service creation tool
· Consulted
with SCE design/development group to improve functionality and usability of SCE
tool
· Worked
with the following protocols: 3GPP, CAP, MAP; ITU-T, CS-1, CS-2, CAMEL, LDAP
TEST ENGINEER,
CONSULTANT
· System
Administrator for Softswitch lab. Sun Solaris
· Support
lab configuration of load test equipment
· Install
and configuration softswitch deliverables on a mutli-node configuration
· Executed
test cases and supported development team with trouble-shooting
EARLIER
CAREER
MCI WorldCom,
Inc. – Senior Development Engineer May 1997 – Dec 2000
· IN
development engineer, responsible for PrePaid Calling Card Service, Support PIN
Service, Paid 800, SUMMA, IBDA, and variety of demonstration and proof of
concept services
· Evaluated
service nodes and development environments from different vendors; Lucent,
Amarex, Intervoice
· Project
lead, providing implementation guidance and general support for engineering
staff; collaborating with product development and test groups
· Developed
tools to access and modify data located in the AXE SSCP and in the SMAS
database (Sybase)
· Consulted
the IN planning group in definition of functional specifications, call flow
documents and database specifications
· Provided
SME technical assistance to vendors in resolution of CSR’s opened against
service logic and SSCP platforms
Ericsson,
Inc. – Senior Engineer Mar
1991 – May 1997
· Design
Lead for Product Provisioning – GVPN (Global Virtual Private Network) service
ordered by MFS/WorldCom
· Supported
MCI’s IN service network and technical services for Prepaid Calling Card, et al.
· Performed
project assessments and quick-study reports for IN/AIN service development, including
feasibility, resource requirements, time schedules and design approach
· Customer
site representative for IN/AIN service development and support services engineering
· Developed
proof of concept services to demonstrate Ericsson’s SSCP capabilities – demo
services included Follow Me Services, Calling Card, Time Of Day/Week/Holiday
Routing, International Call Back, AIN0.1 Distinctive Ringing, Call Blocking,
Call Forwarding and Portable A-Number
· Developed
initial offering of MCI’s PrePaid Calling Card on the Ericsson platform. The initial
release included service logic and networked database for card information
· Supervised
group of 4 development engineers; led requirements definition of service logic
and database actions
· Developed
service logic and stored procedures used by database queries
· Responsible
for initial exchange data for AXE switches including SSP/EO, STP, SCP and
remote switches (RSS)
· Key
participant and SME for MFS company start-up, working on-site
· Support
role included translations data (DT), system level and circuit level testing,
hardware troubleshooting, service logic programs (SCP/STP) management and troubleshooting,
software troubleshooting, charging/billing, etc.
·
Implemented Key Systems and PBX
functionality in local switch, servicing the New York metropolitan area
EDUCATION
ž DeVry Institute of Technology – Irving, Texas
Bachelor of Science, EET ž 1991
TECHNOLOGY
PROFICIENCIES
ž Network Architecture, Software Architecture, Linux Expert,
UNIX, SQL, Shell scripting, javascript, HTML, XML, TCP/IP, VoIP, Sybase, Oracle,
MySQL, Ericsson SMAS, SOA, SaaS, IaaS, IMS, RADIUS, Virtualization, VMware,
routing/switching, DNS, DHCP, 3GPP, CAMEL, LDAP, network security, RHEL, network maintenance, network analyzers, Video
codec, video streaming
PROFESSIONAL TRAINING
·
OO Concepts and
Modeling, Object Space
·
C++ Programming, North
Texas Community College
·
Sybase DB management,
Sybase Inc.
·
STP and SCP SS7
Networks, Ericsson Telecommunications
·
SCP Service
Management, Ericsson Telecommunications
·
Javascript
Programming, w3schools.com
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