Dohn Nimmo    

Ashburn VA 20147 USA

(703) 9293148

dohn.nimmo@gmail.com

 

Professional Summary:

Network Engineer with 15+ years in Information Technologies and 10+ Years of expertise within Data Center and I.T. Network Operations Center (NOC) Infrastructure.

A result-driven Mid-level Tier II engineer with extensive knowledge and experience on the Provider, Customer and Data Center sides.

Experiences and understanding to include installation/configuration/implementation maintenance/health monitoring/troubleshooting and support meeting SLA's within the following areas:

 

LAN/WAN Hardware and Topologies, CISCO IOS/Routers/Switches/Protocols,MPLS/VPLS /T1 /T3 /Metro-Ethernet /OCx Circuits/ Monitoring, IP address schemes, Ether-Channel               Bonding (LACP/PaGP), Site-to-site VPN, IP Addressing, NAT, PAT ACL, Multipath configuration of network devices,dynamic and static routing,VLANS, Inter-vlan routing, Trunking(.q), STP, and Data Center networking.

 

Certifications:

 

CCNA – 640-407 (1999)

Currently pursuing CCNA 200-120 (2015)– Routing/Switching

 

Present Education

 

University of Maryland, University College

B.S. Computer Science

Projected Graduation – 2017

 

Former Education

 

Available upon request

 

Citizenship

 

US citizen by birth

 

Civilian Government Clearances

 

Public Trust – UNISYS 2006 –2008

Public Trust – US Courts (AT&T) 2010-2011

Public Trust - Verizon 2011-2014

 

Community / Volunteer Service Awards:

 

2003 Champions of Character Award

Fairfax County VA – Presented by the Herndon Optimist Club

 

2007 Fairfax County Youth Basketball League Division I Coach of the Year (Basketball)

 

2012 Fairfax County Youth Basketball League Division III Coach of the Year (Basketball)

 

Military Experience:

 

11 year United States Marine Corps veteran serving honorably.

Supported McDonnell-Douglas F-4 Phantom II  Jets.  MOS-6314

Specializing in aviation electronics to include electronic counter-measures.

Secret clearance held.

 

 

PROFESSIONAL EXPERIENCE

 

SAIC

Contracting through Experis IT

Network Engineer

Next Generation Network Architecture Team

Tysons Corner VA

Aug 2014 – Jan 2015

·   Network Engineer responsible for configuration / setup of Cisco 2921 and 4451 NG (next generation) routers.

·   Part of SAIC’s Next Generation Network Architecture team responsible for deployment of router configurations for 85 SAIC remote sites.

·   Router configurations include VPLS and DMVPN connectivity for remote sites.

·   Configuration to include PFR (performance routing).

·   Base configuration / setup of Palo Alto FW PA-200 for management.

·   Responsible for configurations of 85 SAIC remote sites.

·   Responsible for VSS- 6509 and ASR 1002x maintenance in SAIC headquarters.

·   Temporary contract position for the upgrade / cutover of SAIC remote sites.

·   Responsible for base configurations / remote installations of 85 Riverbed Steelhead CX wan acceleration appliances.

 

Verizon Business

Network Engineer

Public Trust Government Clearance (Sept 2011)

Ashburn VA

Sept 2011 – June 2014

·   Tier II Network Engineer responsible for Verizon Government customers.

·   Managed network and security service for government / commercial clients

·   Part of a 24/7/365 Network and Security Operations Center monitoring Verizon Government customers’ network infrastructure.

·   Supporting network infrastructure and remote connectivity for government and commercial clients through MPLS on our PIP cloud.

·   CUCM management / monitoring / administration ( to include Cisco Emergency Responder and

·   Cisco Unity voice-mail).

·   Day to Day issues – configurations/ changes/troubleshooting enterprise managed solutions.

·   Secure Web Access Router Management to manage all of the routers/switches of our customers.

·   We used TACACS to authenticate with jump boxes in place to separate the customers in domanins.

·   Implementing new routers / switches and replacement of same.

·   Using Citrix to access and manage customers.

·   Updating the Juniper IDP signatures weekly for customers, however a different group in Verizon managed them.

·   Script and Implement FW changes for 2 customers, 1 commercial 1 government. FWSM in 6509's for 1 customer and Juniper ISG1000. scripts are peer reviewed and implemented overnight during maintenance windows.

·   Support of networking equipment to include Cisco high end routers, switches, and firewalls, F5 load balancers, Bluecoat Content Filter Appliance, Juniper Firewall ISG1000. QOS implementation on routers

·   Responsible for firewall, routing changes to include scripting and implementation to include VRF’s and Break/Fixes.

·   Responsible for Change and Configuration Management for customers.

·   Responsible for Circuit testing of customer T1 circuits using proprietary Verizon tools (ITS).

·   Configuration / troubleshooting of MLFR ( multi-link Frame Relay ) T1’s circuits

·   Responsible for troubleshooting of DS3 and Optical level circuits and referrals for testing. Worked closely with LEC/IXC’s   around the country to support customer sites.

·   Worked with LEC / IXC for circuit troubleshooting at customer site to include demarc, NIU and CSU on site with CPE. Used proprietary applications for PE side.

·   Responsible for reporting network status to customer on daily conference call and addressing any concerns by customer for same.

·   Used TACACS+ for remote authentication to devices. Setup and used Out of Band access to sites using various modems with both router con and aux ports.

·   Responsible for Security Operations Center validation of customer changes before implementation.

·   Responsible for client-site and site-site (business to business) VPN connectivity troubleshooting. ( Cisco 2811 /3845 )

·   Used HP Openview (Java) / Remedy /SMARTS and Verizon Proprietary ETMS as tools for troubleshooting/ ticketing and SNMP.

·   LAN responsibilities to include VLAN changes/troubleshooting and switch port configurations and Break/Fixes.

·   Responsible for all Hands/Eyes dispatch to data centers and customer sites for troubleshooting and Break/Fixes.

·   Responsible for Cisco TAC, Juniper, Bluecoat and F5 escalations.

·   Responsible for installation of all new network devices into infrastructure and turn-up.

·   We take advantage and manage VRF's for 2 customers. So we can take advantage of ip allocation while virtually separating customer applications or programs as well have named for one of our government customers from remote sites on the same circuits terminating on rails in the respective data centers. All this on our MPLS cloud. Actually in some cases ,the VRF's helps us script firewall changes.

·   We also have enabled access on not only the CE but provider edge routers as well.

 

US Courts / AT&T (Contractor- GTSI)

Public Trust Government Clearance (Aug 2010)

Network Engineer

Reston VA

Aug 2010 – Sept 2011

·   Tier II CSOC (Customer Service Operations Center) in the US Courts NOC. Provided 1^st and 2^nd level support for the US Courts infrastructure. Full time employee for GTSI contracted to AT&T for US Courts.

·   Supported over 1000 remote sites and 3000 circuits in a multi-enterprise environment. Data aggregated through major data centers located strategically in the US. AT&T used several types of proprietary vpn solutions for security. Troubleshot remotely and dispatched major hardware vendors and ATT accordingly for support, circuit troubleshooting /testing, hardware troubleshooting and configuration.

·   Performed in depth troubleshooting of routers/switches as well as resolutions

·   Supported LAN / WAN and associated network infrastructure at the respective sites.

·   Part of NOC team responsible for migration of all sites and circuits from Sprint to AT&T for implementation.

·   Supported Cisco 28xx/38xx/72xx routers and Cisco 35xx / 65xx switches and IOS.

·   Worked with LEC / IXC for circuit troubleshooting at customer site to include demarc, NIU and CSU on site with CPE. Used proprietary applications for PE side.

·   Used “VitalNet” as a front end application for Netflow stats on customer circuits. Also used ip flow cache on routers for determining performance and utilization issues ( top talkers )

·   MLPPP was used for bundling T1’s at the majority of sites. Configured circuits for same and segregated circuits from bundles for troubleshooting and testing (intrusive). 35% of sites had fractional T3 connectivity.

·   Worked with remote site POC’s (point of contacts) at T3 sites to perform head- to – head testing / troubleshooting.

·   Used TACACS+ for remote authentication to devices. Setup and used Out of Band access to sites using various modems with both router con and aux ports.

·   Provided RFO (reason for outage) to upper management for all Severity 1 outages. Also provided timeline and solution for same.

·   Monitored / troubleshot circuits at data centers as well to include OC speeds.

·   Worked closely with SOC ( security ) to troubleshoot network issues ( i.e proxies, Bluecoat 404 /503 errors, latency and utilization issues)

 

NT&T Network Solutions

Network Engineer

Sterling VA

May 2010 – Aug 2010

·   Contracted for a 3 month assignment to validate 347 Cisco routers and switches.

·   Devices ranged from 25xx – 1200x series routers and 35xx- 65xx switches.

·   Duties included password recovery, IOS validation/upgrades, line card validation, hardware chassis validations, memory validations, restoring/ validating configs, port validations for switches, validation for all internal components to include pwr supplies, circuit boards and bus.

·   Used SmartNet to replace defective parts to rebuild unusable devices.

·   Physically racked/unracked devices for assignment.

·   Completed project successfully.

 

Sanofi-Aventis / IBM BlueDirect (Workforce Solution, LLC contractor)

Data Center Network Engineer

Reston VA

May 2008- May 2010

·   Provided 1st Monitor & Response Technical Support as well as “remote-hands”  via telephone/e-mail/chat to customers/clients/end-users, answering and resolving complex questions and issues in regards to the Sanofi-Aventis  Network Infrastructure: (Consisting of Windows & UNIX Servers, CISCO Routers/Switches, TCP/ IP, SONET/DWDM, Environmental/Facilities Check)

·   Provided Network Technical Support via telephone/e-mail/chat to Business Clients (LEC/IXC Carriers). Resolving complex issues, related to Network Infrastructure/System Configuration & Setup, and Product Functionality

Hardware:

92 - Cisco 6509/13, 3650 (E/G) and 2950 switches

17 – Cisco 7206/7606 VXR and 3825 series routers.

Responsibilities to include day to day troubleshooting all LAN and WAN issues on above devices. To include performing all IOS upgrades, initial configurations for network access, scheduled power cycling, hardware replacement and upgrades, cable management / labeling. Network port activations and deactivations for VSM server and security teams to include LACP/Ether-channel supporting over 5000 server network connections. Cisco command structure utilized. Documentation and recording of all VLAN’s and their default gateways.

Responsible for update of data center Layer 2/3 network diagram with any hardware addition/removal, updating CMDB as well.

40 – Firewall Security devices (Cisco ASA’s, Nokia Checkpoint FW 1 appliances)

18 - ACS terminal servers

8 – Cisco 4250 series IDS/IPS appliances.

15 - Cisco CSS 11503 devices

4 – Cisco series 3000 (3060) VPN concentrators.

Responsibilities to include “remote hands” for the administrators of the above devices.  Administered console access for hardware troubleshooting. RMA responsibility for devices as well as IOS / firmware upgrades and initial configurations onto the network.

 

Circuits:

7 – Internet WAN circuits brought into the data center working exclusively with Verizon Core and Business. T1/T3/OC3c circuits. Patched directly from Verizon Fiber mux FlashWave 4500 (self healing dual SONET ring ) co-located in the data center.T1’s used Verizon T1 cards, aggregated from FlashWave mux.Hand offs include multi-mode fiber LC/SC connections, coaxial and copper connections. Responsible for installing and configuring all respective cards in respective routers for all circuits. Network connections to include Point to Point Private WAN’s, MPLS, and Internet. IPSEC VPN terminations for remote sites on Cisco VPN concentrators. Personally responsible for provisioning (Verizon Core) and cut-over of these circuits over the last two years

 

7 – PRI circuits to Verizon’s PSTN provisioned and extended for “Faxination (FAX) product and voice service for Reston data center. Reston used VOIP for inter-office communications and the PSTN for outside callings.

 

17 - POTS and Central Office ground control lines for OOB access and emergency calling.

Response to Service Center Ticketing Queues using: [REMEDY]

Provide accurate ticket documentation and reports of Sanofi-Aventis related issues resolved, while following IT SOPs & Policies. Responsible for appropriate referral escalations to other support and quality assurance areas.

Responsible for resolving problems with and helping perform IMACs (Installs, Moves, Adds & Changes).

Reported directly to management (New Jersey) weekly via teleconference and status reports in as I worked under minimal supervision in Reston, Va.

Applies and adheres to CCNA standards and protocols.

Ensured data integrity and implement standards, procedures and policies to ensure availability, capacity and performance of networks in conformance with SLAs. Coordinated IT network trouble resolution. Able to coherently    & effectively communicate with senior management as well the global community and technical teams. Used rationale to integrate & interpret diverse information.

 

Collected and researched data. Used acumen, experience and investigative skills to complement design & improve work-flow and procedures to include drafting several SOP’s for the data center. Logically able to organize unrelated data into clear and concise interpretations represented in spreadsheets, charts or diagrams to include VISIO. Able to use cogent & logical thought processes to troubleshoot problems within network related systems and associated management tools to include REMEDY and Cisco Works.

Responsible for all Change Management activities, to include base-lining, activations and deactivations of servers as well as installation of network appliances/devices ensuring all new systems and alterations to existing systems go through the change management process. Responsible for Configuration Management; develop, document and publish the standards and ensure the database (CMDB) is fully updated. Provided professional advice to senior management on the options and consequences regarding system changes. To ensure the defined Change and Configuration Management processes and procedures are adhered to by staff carrying out their tasks and where appropriate initiate appropriate training to rectify non-conformance.

 

 

 

 

 

 

 

UNISYS

Network Engineer (full time employee)

Public Trust Government Clearance

Reston VA

Sept 2006 – May 2008

·   Full time, permanent employee assigned to the GTC division, Federal Managed Service Center, Network Operations Center ( 24/7 ) managing the TSA (Transportation Security Administration), HHS / DHS (Health and Human Services / Department of Homeland Security) and the U.S. Census network infrastructures at Layer 2/3.  To monitor these enterprise networks, the following tools were used daily: CiscoWorks (bundle LMS2.5) to include Cisco Unified Operations Manager, HP OpenView NNM release B.06.41. (running under SUN SPARCstation Solaris 2.x), SMARTS (In Charge Global Console) Version6.2. and Peregrine Service Center (ticketing system) Version 5.1.4.0.                            

·   Response to Service Center Ticketing Queues using: (HPOV, Cisco Works). Providing accurate documentation and reports of resolved network related issues, while following SLAs, SOPs & Policies.

·   Serve as Support Liaison for Customers (TSA/HHS/Dept Homeland Security/Census), while conveying feedback and follow-up of additional testing and troubleshooting to Management.

·   Responsible for resolving problems with and helping perform IMACs (Installs, Moves, Adds & Changes).

·   Responsible for appropriate referral escalations to other support and quality assurance areas.

·   Responsible for monitoring SNMP alarms/traps and troubleshooting same at Layers2/3.

·   Responsible for dispatching field techs for SRMS installations, and troubleshooting.

·   Reported to each agencies liaison, daily status reports and shift reports. These networks were using SPRINT’s MPLS cloud as well as the SPRINT – LINK IP cloud. The TSA infrastructure used Sprint’s PIP cloud (Peerless IP) and ATT’s IP cloud as well. Worked with SPRINT and ATT’s Engineer’s in troubleshooting and updating problems and tickets. 

·   Work closely with the Security Operations Center to track ip addresses at layer 2/3 within the multiple enterprise networks.

·   Configured and troubleshot new / existing Layer 2/3 devices (Cisco) 2800, 3800 series routers and 3560 / 6509 switches.

·   Configured vlans and sub-interfaces for Layer 2/3 devices. Used both CLI (command line interface) and Cisco Works for the above tasks.

 

TECHNICAL SKILLS:

 

Hardware:

CISCO Next Generation -Routers 2921 / 4451 Next Generation configurations

Cisco Legacy Routers 7xxx

CISCO Switches (Mainly -3560E/G ,3750 Stackwise, 6509/13)

Riverbed Steelhead CX WAN acceleration appliances configuration / setup

Cisco ASA /VPN concentrators (3xxx series) installations/monitoring

Cisco PIX 525 configuration/setup/installation/monitoring

CISCO NFSM ( 6509 )

Cisco CSS (11xxx series) installations

ACS terminal servers

 

Technologies/Connectivity:

IPv4, Cat5/6, RJxx (11, 45, 48, etc), Gigabit Ethernet Gigabit, FDDI, Token Ring

CSU/DSU, NIU/Smart Jack, HDSL/DSLAM (HTU-C/HTU-R Cards),

DS0-3, OC3/c, SVC’s, DLCI’s, PVCs, X.25, PRI/BRI, Analog POTS

SONET (Flash Wave 4100/4500 mux)

TDMA/CDMA/GSM/DWDM

AC/DC/UPS Power Supplies

 

 

 

 

 

 

Software/Protocols:

Cisco IOS

Cisco Works Network Monitoring, NMIS, Cisco Default fault management

HP Tool Suite -HPOV (Open View) / Remedy Ticketing System

CUCM

Raptor / Gauntlet FW's, CISCO IOS 11.x and above  Protocols: (TCP/IP/IPX, OSPF, EIGRP/IGRP, BGP, LACP, PaGPCDP, STP, LLDP

HyperTerminal

Windows OS 2K/2K3/XP/Vista, MS Office, Outlook, Exchange, Lotus Notes

Symantec Ghost/PcAnywhere/Terminal Services/Putty/Remote Desktop,