Darren G. Johnson

darrengjohnson38@yahoo.com

2600 Loring Road, Kennesaw, GA 30152

(770) 639-1350

 

Summary: Senior VoLTE/LTE/CDMA/UMTS Wireless End to End project engineer proficient in the design, integration, implementation, and support of multi-protocol cellular wireless platforms for major wireless carriers and equipment providers.

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Tools

 

           Access 7 call flow analyzer                                            

           RCATS Remote Testing Probes (Casabytes)                  BPEL

           MTI Mapping tool/RMAP                                              Nettrack

           SPLUNK                                                                         Ericsson MSC, eNodeB

           Sprint MVNO.com, CTMS

           Tekelec and Alcatel STP Routing & Translations          LNP Call Routing                     

           Nortel MTX, BSM, SDM, MSC, RNC, MGW, HLR's

           Lucent 5E, ECP, MSC, NodeB, HLR, RNC, eNodeB    GRANITE

           Motorola EMX, CBSC, RNC, SwitchMate                    LERG                                                                             

           MARS AMA Records/ CDRLive                                   Wireless Security Operations Portal

           Vision, CMIS billing systems                                         Netcool

           Syniverse LNP database (SOA)                                     Compaq HLR’s

           Remedy Ticketing System                                              InterOp SMSC/MMSC

           Voice Mail Systems                                                        PuTTY telnet client

           (Glenayre, Octel, Converse, Centigram)                        UNIX

           Lucent, Nortel & Motorola MSC translations                Torch/Snooper

           SNAP/NEIRM                                                               

           SBONS

           ICOMS order and Billing Systems

           Cisco Active Network Abstraction

           CISCO SIAD EMS

           ALU 5620 SAM

         ALU SAM LTE nodes

         Ericsson LTE OSS nodes

         Cisco SGW/PGW/PCEF nodes

         GFP-Mobility

           AAA Sever-Bridgewater

           Oracle Stack Tools (Siebel/CRM, ASAP, UIM, AIA, BRM, POS, OSM)

           Stellent HA/PDSN

           IRIS-Tektronix tool EPC, SGi, IMS,

           Geoprobe trace

 

 

                              

 

Experience

 

AT&T – Contractor – VoLTE/Incubation Wireless Engineer (Atlanta, GA) August 2012-Present.

 

·   Provide end to end trouble shooting support for Incubation LTE and VoLTE issues.

 

·   Provide end to end support for FFA/Integration for pre-launch VoLTE and LTE by pulling traces and providing analysis on the S1U, S1MME, and IMS traces using ISA (Iris Session Analyzer) and IPA (Iris Protocol Analyzer) tool.  I also provided Access7 and Geoprobe traces and analysis. 

·   Provide troubleshooting expertise on Voice over LTE, SMS, MMS, and Data sessions.

·   Incident commander for troubleshooting issues by bringing together various plat form SME’s to provide analysis.

·   Provide troubleshooting and analysis support for Ericcson and ALU eNodeB’s, MME’s, SGW’s and P-GW’s as well as PCEF, PCRF, and PAS in the EUTRAN and EPC for AT&T.

·   Provide troubleshooting for high ping times, accessibility  and retainability, and low through put issues for LTE and VoLTE.

 

 

 

Cox Communication – Service Delivery Project Engineer III (Atlanta, GA) Nov. 2010-April 13, 2012

 

·   Subject matter expert responsible for Cox AAA, HA (home agent), SMSC, MMSC, WAP gateway, Redknee Policy Server,  the Oracle Stack which includes POS, Siebel CRM, BRM, Active Mediation/OCSG, AIA, OSM, UIM, OIM, ERP, and ASAP.

·   Analyzed KPI in order to help prevent revenue leakage.

·   Provided Tier III Service Assurance for the entire Cox Wireless Service environment.

·   Provided Tier IV support functions for 3rd party supplied network elements and services (Sprint network, OTA, Telcordia)

·   Correlated issues and problems within Wireless to detect larger problems and engage appropriate support levels to correct

·   Managed Service Problem Handling for the Wireless environment to include diagnosis and repair of service issues, escalation of service issues for higher tier support, escalation of issues for vendor support, and identification of areas for improvement to prevent future issues. 

·   Initiated and supported Incident Command within the Wireless environment,  based on criticality of incident or impact of event, exercises discretion to mobilize fix team (Tier IV, Vendor, System, etc.) and execute communications (SBONS, Executive Bridge, etc.).

·   Created detailed reports to include the examination & analysis of Cox Wireless Service environment outages to be used in after-action reviews and analysis of the issue/incident to minimize repeated outages and improve network reliability.

·   Provided oversight and assurance of Change Management activities impacting the Wireless environment.

·   Provided assurance management of new product development implementation into Operations.

·   Provided Cox Wireless Service environment knowledge and subject matter expertise in support of all Wireless products.  Identify knowledge gaps and recommend remediation in areas that are key to improving Wireless Support Team effectiveness.

·   Developed training and documentation to support the wireless support environment.  This includes all aspects of the Wireless service including traditional IT, telephony, and cellular specific areas of the offering.

·   Provided leadership and mentoring for the Wireless Support team.

·   Defined and documented methods & procedures for the Wireless Support team.  Maintain detailed network and configuration documentation.

·   Served as call flow analysis trainer and consultant.

 

Alcatel Lucent – Contractor (Atlanta, Georgia)

Senior Wireless Project Engineer/CDMA Subject Matter Expert (Dec. 2009- Nov. 2010)

 

Served as member of a project management team that was in charge of prelaunch and launch of MVNO wireless for Cox Communications.

 

 

·   Lead CDMA subject matter expert (SME) and project engineer providing knowledge and coaching of Cox’s MVNO wireless network end to end. 

·   Provided knowledge transfers on all call flow scenarios on the Sprint and Cox networks.

·   Provided end to end knowledge of Sprint’s MVNO RAN for voice, data internet connections, Sprint PDSN/FA, Sprint AAA, Sprint SMSC/MMSC Sprint MAF, Sprint AMS, Sprint CTMS, and content download (BREW, REAL).

·   Provided end to end knowledge of the Cox AAA, HA (home agent), SMSC, MMSC, WAP gateway, Redknee Policy Server,  the Oracle Stack which includes POS, Siebel CRM, BRM, Active Mediation/OCSG, AIA, OSM, UIM, OIM, ERP, and ASAP.

·   Provided expert knowledge on 3^rd party vendor functionality of Sprint RAN and SS7 network, Telespree, Interop OTASP, Telcordia, Qualcomm, Brightstar 3PL, Verisign, Web Content (Interwoven), Spatial Point, Vox Mobili, Casero, mPortal, SEVEN IM and Email, Openwave Email, and Young America (mail-in rebates).

·   Provided training and knowledge transfer to the ALU NOC in Plano, Texas and the customer service group in Oklahoma City, Oklahoma.

·   Provided knowledge support to the ALU Wireless NOC through the creation of M&P’s, Stellant documents, and training documents.

·   Proxied for assigned 3^rd party vendors at Cox’s Change Control Board meetings to address wireless issues.

·   Engaged Telcordia SCP for any translation change requests to the Telcordia CvAS platform

·   Analyzed KPI (Key Performance Indicators) in order to help prevent revenue leakage.

·   Defined and documented methods & procedures for the Wireless Support team.  Maintain detailed network and configuration documentation.

·   Served as call flow analysis trainer and consultant.

·   Served as technical writer for all pre-launch testing and process flows for cox.

·   Managed the process of bringing together all tiers and teams to manage ticket flow and group functionalities.

·   Helped design and train the various NOC’s on the alarm dictionary.  This included looking for redundancy and fault management.

 

 

 

ATT Mobility – Contractor (Atlanta, Georgia)

Network Subscriber Services -Network Support Engineer II (May 2008 – Dec. 2009)

 

·   Responsible for troubleshooting the following areas: T1/T3 / IP networking and underlying protocols, SS7, Voice Tones, Voicemail, Voice Dialing, General RF and Switch Operations issues, working with node b on Nokia, Ericcson, Lucent, and Nortel RF scripting parameters technologies.  Call Routing Translations, Voice Services and Features.

·   Industry leader and SME in the troubleshooting of multi-vendor network elements: Ericsson (BCS, node b, and MSC), Nortel (MSC, BSM, MGW and HOR), Siemens Cell Sites, Nokia (BSC, node b scripting parameters, and MSC) and HP.

·   Understanding of handset related issues pertinent to delivery of data and voice services in a GSM and UMTS environment.. Act as support for AT&T Mobility voice and data initiatives, product and service offerings.

·   Third tier escalation for Customer Care Technical Support, Enterprise Administrators, NCC, 3rd party vendors and as needed ECC, NOCs and other LECs to resolve customer Data, Voice, Feature and E911 issues.

·   Extensive experience with call flow data tools: AcceSS7, RCATS, CDRLive and Traffica.

·   Provided call flow training for GSM call analyzing in Access 7.

 

Home School University (Canton, GA)

High School History Teacher (2007-2008)

 

Motorola - Contractor (Greenville, SC)

Nortel DMS-MTX Network Testing Engineer (2006)

 

 

·   EIVT (Extended Inter-Vendor Testing) or database testing and auditing on all Nortel translations and trunking in preparation for switch cut at Verizon Wireless.

·   Served as a project engineer that devised and executed all prelaunch testing for DMS 100 switch cut.

·   Tools used are:  QMOB, LogUtil, Mapci, MTXTRACK, MTXTRAVER, ran Traps and Swears on and OMP cut as well on the DMS-MTX MSC, BSM, BTS and Motorola CBSC’s

·    

 

Verizon Wireless (Alpharetta, GA)

Technician-Network Repair Bureau/ Roaming  (1999 – 2006)

 

·   Audited network after migrations to insure that both Verizon and all partners had made the proper changes to the network.

·   Tested daily on the Verizon Wireless CDMA network (both national and international) using RCATS testing probes on the facilities in question..

·   Identified network voice and SMS issues using RCAT’s and Access7 to resolve customer and network issues.

·   Served as team trainer on call flow TCAP and ISUP SS7 messaging using the ACCESS 7 Database; RCATS usage; Nortel, Lucent, and Motorola roaming and translations tables;         Caller ID call flow.

·   Working knowledge of SS7 signaling and messaging.  Performed gateway screening translations and wrote manual for Alcatel 899 series for Verizon Wireless Network Repair Bureau and roaming group.  Checked and wrote instructions for Tekelec STP routing.

·   Worked as a Technician providing second-tier technical support to the Verizon Wireless technical support groups.

·   Analyzed ROP and log file data from ECP/5E, Nortel DMS 100, and Motorola MSC’s as well as Compaq HLRs and looking for irregular facility problems on the network.  Examine the ROP data to detect hardware/software cell site and network problems on all network equipment.

·   Maintain Remedy trouble ticket database of all problems found and fixed, so that all NOC personnel can view the information for future reference.

·   Acted as a facilitator between Technicians - NOC, the Network Repair Bureau, System Performance, Maintenance Engineering group as well as equipment vendor personnel ensuring appropriate parties are working together and aware of abnormal network conditions.

·   Worked with Nortel (DMS-MTX, BSM, BTS, SDM), Lucent (ECP, 5ESS, OMP, Motorola (EMX, CBSC) cell translations.

·   Troubleshot call processing problems pertaining to, but not limited to: translations, SS7, telecommunication facilities, manufacturing phone, and any other mobile phone problems.

·   Utilized UNIX and special UNIX tools to perform script writing functions on the Lucent ECP.

·   Worked closely with the New Features Group and internal personnel to assist in the deployment of new features related to phones and call processing.

·   Working knowledge of dialing plans and digit-by-digit routing. Extract and analyze digit translations for proper routing on Nortel, Lucent, and Motorola MSC, ECP, BTS, BSM, 5 E’s.

·   Offered pre-sales and post-sales support by providing technical support to sales team on any new products, providing support to the regions by providing area personnel with cell and switch outage reports, and periodically assisting in network surveillance and monitoring

·   Maintained and updated Verizon Wireless switches to ensure accuracy of NPA/NXX in Lucent, Nortel and Motorola switches.

·   Supported foreign carriers roaming on Verizon network ensuring their line ranges are loaded correctly.

·   Updated Verizon subscriber’s records in the Compaq HLR’s.

·   Helped deploy LNP services and worked in the SOA database to troubleshoot LNP issues.

·   Served as liaison and project manager between Verizon Wireless and Sprint PCS.

 

 

 

 

United Creditors Alliance      (Atlanta, GA)

Front Line Collection Specialist and Account Manager (1998-1999) 

 

Bachman Memorial Home for Boys      (Cleveland, TN)

Counselor/Supervisor   (1997)

·          Supervised, coordinated activities and kept accurate records of each youth under my care.

 

excel telecommunications, (Cleveland, TN)

Regional Training Director (1993 – 1997)

·          Sold long distance service and recruited and trained others to do the same.

 

Education

 

B.S., Biblical Education and Theology with minor in Historical Studies;

Graduated Cum Laude,   Lee University, Cleveland, TN

 

Worked on MDiv Church of God Theological Seminary, Cleveland, TN

 

Languages

 

Greek and Hebrew

 

Computer Experience

A + certification, Word, Excel, Access, Power Point, DOS, Windows 95, 98, 4.0, NT, 10 hours college credit in Windows 2000.

 

Certified Training

 

Nortel DMS 100-MTX Translations I  - CDMA

Nortel IS-41 Overview and Implementation - CDMA

Nortel CDMA IS-95 Standards      

Nortel Cellular Systems Overview  - CDMA                  

Lucent Technologies Wireless Networks Multiple Systems - CDMA      

Lucent Technologies Digital Routing Translations - CDMA                    

Lucent Technologies IS-41 Overview/Implementations - CDMA            

Agilent SS7-Access7 Systems  - CDMA                       

Motorola SwitchMate 1& 2 CDMA                           

Motorola EMX-V Translations- CDMA

Motorola INA/ATM

CDMA 2000 1x

ALU LTE Certified Training – High Level-Low Level overview and call flow algorithms

Welcome to LTE –ATT

LTE Overview

ATT Architecture Overview

Wireless basics 101 –Wireless at a Glance- ATT

Wireless Basics 102 –GSM, GPRS at a Glance- ATT

Wireless Basic 103- UMTS at a Glance - ATT

Internetworking and TCP/IP basics

Overview of OFDM

Multiple Antenna Techniques

Overview of IMS

LTE SAE Evolved Packet Core (EPC)

AT&T IP RAN Backhaul Solution

Introduction to IP QoS

IP Convergence Overview

IP Routing Fundamentals

IP Networking Control and Management

IP Networks Troubleshooting

Cisco 2941 Mobile Wireless Router

Intro to Netcool

Granite for NOC Technician

Introduction to UNIX

Intermediate UNIX

USP Involved Functions and Teams

USP Services Overview