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Jakob Lengfelder Str.
Bad Homburg, Germany
Systems Administrator, Network Systems
for Data, VoIP, Video, and Internet
Engineering, Implementation, and Support of Internet, WAN / MAN / LAN
||Video Conferencing, VoIP,
Multimedia Services and Processes Developing|
Control and Infrastructure Management
||Team Leadership /Motivation / Development|
||Mediation between technology and business
MS in Telecommunications
University of Colorado, Boulder,
State University of Telecommunications, St Petersburg, Russia
CCNP Cisco Certified Network Professional
CCNA Cisco Certified Network Associate
Significantly grew business
volumes by aggressively identifying best vendors within target markets.
Over years of business development experience in technology and service
Built strong, transferable
executive level business relationships by providing excellent, valuedriven
customer services to broad range of clients.
Increased market competitive
rating of division by developing new network product offerings.
Identified and analyzed growth
opportunities through market analysis, product development expertise,
and keen business instincts.
Built strong business relationships
by providing excellent, value driven customer services for internal
and external customers.
Led crossfunctional teams
of senior managers through establishing new lines of business with subsequent
dramatic revenue growth and multimilliondollar savings.
Processes / Application
VoIP, SIP, RTP, RTCP, MGCP, H.,
Megaco, FTP, HTTP, DNS, SMTP, Telnet, SNMP
and LAN Technologies:
TCP, UDP, ATM, FR, X., Switched
LAN, Wireless LAN, WiFI, .a,b,g, Ethernet, SONET, SLIP, PPP, PPPoE,
Routing Protocols and
RIP, OSPF, IGRP, EIGRP, BGP, HSRP,
VRRP, PBR based on route maps, IP multicast with IGMP and PGM, ICMP,
ARP, STP, STP for multiple VLANs.
technologies and interfaces:
BRI / PRI ISDN, ATM, Frame Relay,
PPP, HDLC, SDH, k /T /E leased lines, DS, DS, OC, OC, and
TACACS, RADIUS, ASA, SSL, IPSec,
Cisco Pix firewalls, Nortel CheckPoint family, Cisco Secure IDS.
Hardware and vendors:
Switches/routers: Cisco, Juniper,
Huawei, HP ProCurve switches.
HP OpenView, CiscoWorks, Cisco
Call Manager and CM Express, IPCC Express and UCCX Express, RMON, SNMP,
Unity ., MRTG, Tivoli, InfoVista, NaviScore, QIP, Network Analyzers
Spirent, IXIA, Solar Winds, NetScan etc, TCPdump, SNORT, Cricket.
Software and OS:
Windows/NT, Linux SuSe and Red Hat, Cisco IOS, Catalyst IOS
Computer Ltd, Munchen, Germany May – April
I played varied roles working as Sr.
Network Engineer in the Customer Network Engineering department of Verizon
Businessglobal communication solution provider.
and implemented variety of network services based on Cisco / Active
Directory technologies such as:
Network administration; Information
security and single signon user access to networked resources; Synchronization
of directory updates amongst several servers, assign policies, deploy
software, and apply critical updates
Migrating plan of enterprise
Frame Relay/ ATM network to an MPLSbased VPN Network woth QoS; Enhanced
security of customer’s WAN infrastructure by isolating each customer’s
network to corresponding VRFs of MPLS.
Technical design of networks
and solutions according to customer requirements; Implementation of
nonstandard solutions for MPLS / BGP VPNs and hand over to network
Network troubleshooting and
anomalities resolutions liaising with the internal and external providers
of network services; scheduled network maintenance windows and coordinated
changes to the service.
Network Performance Reports
and published information in a structured,
user friendly way on a web platform; wrote
network change control procedures and updated network documentation.
Ability to work autonomously
and managed own schedules to meet deadlines; demonstrated a positive, cando attitude, and worked flexible
hours as required.
Electronic Data Systems Corp. EDS,
Ruesselsheim, Germany December March
I was contracted by the biggest IT outsourcing
company to lead a group of engineers to implement VoIP system for US
Army installations across EMEA. I succefully rolled out the pilot project
into operational service and achieved following results:
Architectured and Designed
network layout and produced routers and switches configuration to match
US Army SLA QoS requirements and metrics.
Expanded Active Directory
group policies and global catalog servers; Added new AD Objects and
Object Classes, extended new classes and new attributes for existing
Reduced traffic load on %
of network core layer by changing IP flow distribution between core
and distribution layers.
Decreased network delay by
% for VoIP services and improved network performance; optimized settings
of firewalls and routers/switches Access Control Lists throughout network.
Configured Cisco CallManager,
Multipoint Control Unit collaboration server, Meeting Place application,
and Unity Server for audio/video multipoint conferencing.
Improved Call Center performance
by optimizing skill based call routing; integrated Automated Call Distribution
ACD system based on Cisco IPCC . and Cisco CallManager.
Played a role of Single Point
of Contact for all technical escalations in respect to Network Security,
VoIP service and Cisco hardware.
Express, Brussels, Belgium January November
Network Integrator; contract Network Operation Center
I was given the task to design VoIP
infrastructure across EMEA locations, implement migration of users from
analog PBX phones to IP Phones, and change network security settings
to support VoIP services.
To succeed at the job I:
Developed VoIP services strategy
for EMEA region and created written plan for test and rollout phases.
Eliminated duplicate ACLs
on access layer routers and secured rights to use VoIP resources by
setting up TACACS+ controlled access to network nodes.
Produced and tested VoIP
configurations for Cisco series routers and incorporated voice
traffic prioritization with QoS CBWFQ queuing on Catalyst switches.
Optimized security settings
on Cisco PIX firewalls and screening routers to minimized delay for
Improved sales department
phone response time by optimizing VoIP calls distribution inside huntgroups.
Saved on Call Center overhead
cost and reduced needed agent’s headcount by implementing skill based
call distribution based on Cisco IPCC and CallManager.
Increased security of network
infrastructure by implementing TACACS+ controlled access to network
Improved audio quality on
IP phones by adding Quality of Service QoS based on Class of Service
CoS and preferential treatment of voice traffic on Cisco access
Migrated regional service
hubs from PSTN to IP telephony in Sweden, Netherlands, and India.
Space Agency, Darmstadt, Germany January November
Consultant; contract Network Operation Center
I was challenged to finish migration
of WAN network between nine Earth Stations and European Space Operations
Center ESOC and incorporate TACACS+ controlled network access for
flight control centers. Elements of my role were:
Designed the expansion of
production network for new space research project, tested it and prepared
for rollout to operational service.
Updated and Maintained Communication
Systems inside Satellite Earth Stations and Troubleshooting of data
network Ground Segment between Earth Stations and Space Network Operations
Managed to keep flawless
network performance at IP layer through optimization of WAN / LAN configuration,
IP routing and switching.
Tested new scientific and
research applications performance on validation network segment and
implemented it into network functionality.
Upgrading network core switches
for better core layer availability and applied advanced port security
standards. Designed resilient network infrastructure and simplified
disaster recovery plans.
Provided Network Service
Support, implemented network software and hardware updates.
Implementation and maintenance
of scripts and/or procedures where applicable for the automated and/or
controlled execution of the above activities, generation or update of
technical documentation in relation to system upgrades;
Evaluated network vulnerabilities,
assessed Security breaches and proposed Security Solutions. Secured
network access via TACACS+ and RADIUS servers.
Qwest Communications, Minneapolis,
MN March January
Senior Network Systems Engineer
Product Development and Operations Support
I was brought in R&D division
of former Bell Company to develop, launch and support new SLAs for FR
and ATM products and network service offerings to improve company market
position. I successfully:
Wrote technical specifications,
authored and published Request for Changes RFC including business
needs, components affected, cost estimates, risk assessment, resource
requirements, and approval procedures.
Participated in Planning,
Building, Acceptance testing, and Release Deployment for X., Frame
Relay, and ATM services and Service Level Agreements. Developed Balanced
Scorecard for new SLA and tied it to Key Performance Indicators KPI
Increased market competitive
rating of division by coordinating developing and deployment of new
products such as FR/ATM SLAs, DS High Capacity PVC, and Multilink FR
Saved % on labor cost
by leading team of group managers to streamline Frame Relay / ATM new
products’ prerelease testing, troubleshooting and custom tailoring.
Provided configuration, technical