Engineer Manager

CHRISTOPHER CHO

***** ******* **. ********, ** **166 ? ***********.***@*******.*** ? 703-

***-****

OBJECTIVE:

With over 18 years of technical experience in network design, deployment,

and implementation of messaging solutions to a variety of Federal entities,

I have been concentrating on E-mail migration and Exchange upgrade projects

for multiple Federal entities in the past 6 years; and I am seeking the

next challenging project as an Senior Microsoft Systems Engineer where

innovative and reliable design experience will be utilized and advanced.

EDUCATION:

Bachelor of Science in Physics June 1989 Virginia Tech

W/ Minor in Math

Bachelor of Arts in Economics May 1990 Virginia Tech

Master of Arts in Economics May 1993 Virginia Tech

CERTIFICATION: Microsoft Certified Systems Engineer

SECURITY CLEARANCE: Secret Clearance with Department of Defense

PROFESSIONAL EXPERIENCE:

Location: Transportation Security Administration Headquarters in Arlington,

VA

Date of Employment: March 2012 - Present

Position: Technical Architect for Sagent Partners

Completed Projects:

Designed, developed, and implemented Exchange 2010 solution for 80,000

mailboxes.

Upgraded BES infrastructure from 4.1 to 5.0 supporting 10,000 BB users.

Migrated 80,000 mailboxes using Exchange PowerShell scripts.

Migrated 7500 BB's from BES 4.1 to BES 5.0 using the Transporter.

Transitioned AD from Windows 2003 to Windows 2008 functional level.

Deployed 3 clustered Good 7.1 servers supporting 3000 iOS devices.

Location: Department of Homeland Security office in Herndon, VA

Date of Employment: September 2010 - March 2012

Position: Messaging Architect for HP

Completed Projects:

Deploy 110,000 mailbox Exchange 2010 DAG for E-mail as a Service (EaaS).

Setup BlackBerry Enterprise Server high availability for 25,000 mobile

users.

Migrated Exchange mailboxes to resource forest using Quest Migration

Manager.

Location: Transportation Security Administration office in Reston, VA

Date of Employment: July 2009 - September 2010

Position: Network Architect II for Unisys

Primary Job Responsibilities:

Ensure TSA technical problems are resolved in a timely manner.

Designed and deployed mailbox capacity to handle up to 100,000 users.

Migrated BlackBerry SQL database to a 64-bit clustered SQL 2005 platform.

Deployed additional BES to accommodate 10,000 BlackBerry handhelds.

Wrote build documentation and implementation plan for Docs-To-Go for BES.

Wrote up procedural documents for any change management processes.

Provided top tier technical support for Exchange and BlackBerry.

Generated reports, project timelines, and metrics.

Location: Executive Office of the President Datacenter in Olney, MD

Date of Employment: September 2008 - July 2009

Position: Senior Messaging Architect for Sycom Technologies

Completed Projects:

Designed new Exchange 2007 Organization to completely replace Exchange

2000.

Installed Exchange 2007 using Single Copy Cluster technology on Windows

Server 2008 operating system attached to Storage Area Network.

Provided seamless user mailbox data migration across two Exchange

organizations.

Designed and upgraded BlackBerry infrastructure integrated with NeverFail.

Upgraded the SQL database to 64-bit SQL 2005 database.

Location: Transportation Security Administration office in Reston, VA

Date of Employment: October 2006 - September 2008

Position: Network Architect III for Unisys

Primary Job Responsibilities:

Deployment of 27 Exchange 2003/2007 servers at the new Datacenter.

Setup multiple node mailbox and public folder cluster servers.

Installed 4 Exchange 2007 Client Access Servers.

Created new routing group for 5 Bridgehead servers.

Engineered redundant multi-BlackBerry servers with replicated SQL

databases.

Capacity to scale up to 10,000 BlackBerry devices.

Created build documentation, testing documentation, and implementation

plan.

Exchange 2000 to Exchange 2003/2007 migration subject matter expert (SME).

Designed mailbox capacity to handle up to 100,000 users.

Separated the Exchange Organization into multiple routing groups.

Implemented multi-clustered mailbox servers with redundant network

configuration.

Provided Exchange 2007 Client Access Server for Outlook Web Access.

Designed and tested solutions on VMware before deployment.

Upgraded 4 BlackBerry Sites at HHS from 4.0.7 to 4.1.4

Applied the Daylight Saving Time patch to BlackBerry, Citrix, JRE, and

Windows.

Wrote up procedural documents for any change management processes.

Provided top tier technical support for Citrix, Exchange, and BlackBerry.

Generated reports, project timelines, and metrics.

Location: NeuStar, Inc. in Sterling, VA

Date of Employment: March 2005 - October 2006

Position: LAN Manager for NeuStar

Primary Job Responsibilities:

Evaluate and identify technology platforms to deliver company services.

As a member of the management team, establish the support process.

Managed and mentored a team of technical professionals.

Merged network infrastructures after acquisition of new companies.

Provided escalation support to the Helpdesk and the LAN Administrators.

Budgeted annual expenditures for training, hardware, and software

requirements.

Designed network solutions to handle a rapidly growing company.

Delegated assignments and provide technical direction to network engineers.

Coordinated with other departments to ensure uninterrupted network

services.

Oversaw the daily activities of the internal Helpdesk.

Provided on-call escalation support beyond the normal business hours.

Resolved outstanding issues with users that require management

intervention.

Location: Microsoft Corporation in Charlotte, NC

Date of Employment: February 2004 - January 2005

Position: Exchange Enterprise Support Engineer for Microsoft

Primary Job Responsibilities:

Provided top-tier technical support for Exchange Server Client

Infrastructure.

Configured RPC over HTTPS with Outlook 2003, Exchange 2003, and AD 2003.

Troubleshot Front-End, Back-End Exchange server scenarios.

Read Network Monitor traces to find the root cause of the problem.

Supported Outlook Web Access and Outlook Mobility Access.

Disaster recovery of Exchange databases from tape backup.

Installation of Certificate services and Certificate distribution.

Wrote up solutions for publication to the Knowledge Base.

Setup Pocket PC and Smartphone Active-Sync and Always-up-to-date.

Location: NATO Seasparrow Project office in Arlington, VA

Date of Employment: June 2002 - January 2004

Position: Network Administrator for CTI

Primary Job Responsibilities:

Network administrator for the NATO Seasparrow Project Office network.

Oversaw day to day network operations of the NATO Seasparrow office.

Supported Compaq Proliant 2500 servers running Novell in a Novell/NT

environment.

Performed daily backups and restores using ArcServe 6.5 running on a Compaq

Proliant server running NT.

Monitored network status via What's Up Gold to provide uninterrupted

network services.

Location: Navy Marine Corp Intranet at the Pentagon

Date of Employment: June 2001 - June 2002

Position: Domain Admin for EDS

Primary Job Responsibilities:

Domain Admin supporting both the Classified and Unclassified network.

Performed nightly back-ups of NAS/NT/Exchange servers.

Responsible for monitoring and resolving network outages.

Technical lead/manager for second shift in a 24/7 network support

environment using What's Up Gold for both the classified and unclassified

networks.

Utilized SMS 2.0 to remotely troubleshoot network problems.

Location: NAVSEA at the Navy Yard

Date of Employment: December 1998 - April 2001

Position: LAN Administrator for EDS

Primary Job Responsibilities:

LAN Administrator responsible for monitoring 20 NT Servers/650 NT

Workstations.

Responsible for testing Windows 2000 migration scenarios from Windows NT

domain.

Provided training and guidance for the existing helpdesk staff.

Oversaw deployment of new software and hardware upgrades.

Location: Internal Revenue Service in New Carrollton, MD

Date of Employment: July 1998 - November 1998

Position: Network Engineer for NRI

Primary Job Responsibilities:

Provided NT Administration support for three Domains (1500+ NT

Workstations).

Oversaw migration from cc:Mail to Exchange project.

Administered and optimized the trust/security relationships among the NT

Domains.

Location: NAVSEA in Crystal City, VA

Date of Employment: March 1998 - July 1998

Position: Desktop Support for HTS

Primary Job Responsibilities:

Provided NT/Novell Network support for the NAVSEA military LAN (400+ PC's).

Installed Microsoft Office 97 as an upgrade from previous Application

Suites.

Responsible for migration from cc:Mail client to Outlook 98.

Maintained Win95 operating system and Navy standard applications.

Company: National Automobile Dealers Association in Vienna, VA

Date of Employment: March 1997 - February 1998

Position: Technical Support Specialist for NADA

Primary Job Responsibilities:

Provided technical support for the Guide 2000 Vehicle Valuation Program.

Worked with the Paradox database to keep track of 4000+ subscribers.

Tracked, reported, and projected future needs to accommodate growing

database.

Assisted with Workstation, Printer, and Network support.

Computer Skills

Experience managing, installing, and maintaining application servers

- Windows Server 2012 platform with Exchange 2013 deployment

- Deployment of Windows Server 2008 R2 Enterprise 64-bit Edition

- Installing and maintaining Certificate Authority services

- Administering Key Management Services for encrypted E-mail

- IIS Administration 4.0, 5.0, and 6.0

- Setting up SSL in Outlook Web App

- Securing the LAN environment via Group Policy and Firewall rules

- Administering multiple domains in a mixed NT and AD Network

- Monitoring networks via NetIQ, SCOM, SMS

- Installing, maintaining, and administering Microsoft Exchange servers

- Storage services via DAS/NAS units

- Hyper-V and VMWare virtualization deployment

Active Directory

- Transition the AD forest functional level to AD 2008

- Schema updates and Configuration container maintenance

- Setting up sites and subnet scope for Exchange 2010 requirements

- DNS integration with AD

- Upgrading NT domain to Active Directory

Expertise in securing the network

- Deploying Host Intrusion Detection System (HIDS)

- Providing a secure internetwork using Firewalls

- Utilizing network address translation (NAT) to isolate internal IP's

- Setting up Restricted Zones to lock down and isolate sensitive

databases

Cisco IOS

- Configuring access lists on Cisco routers

- WPAD configuration on firewall

- Cisco router password recovery

- Supporting routing protocols RIP, IGRP, EIGRP, and OSPF

Extensive experience installing and configuring Windows desktop

- Migrating from Lotus cc:Mail to Microsoft Outlook

- Installing and provide training for Microsoft Office 97 through Office

365

- Modifying the Windows Registry to fix errors

- Supporting VPN networking on laptops for travel purposes

- Setting up and modifying report formats with Crystal Reports 6.0

Inter-organization Migration across forests

- Migrate BlackBerry handhelds across domains using the BlackBerry

Transporter

- Quest migration manager installation and administration

- Microsoft native migration script to move mailboxes across the forest

MAC

- OS versions 10.4 and 10.5

- Safari, Firefox, Opera browsers

- Office 2004 and Entourage

Norton/Symantec Suite of Utilities

- Network wide distribution of Norton Anti-Virus 10/11/12 Corporate

Edition

- Imaging servers and workstations with Norton Ghost

Cheyenne Arc Serve 6.5/Seagate BackupExec 7.0/Veritas Netbackup 7.0

- Schedule daily/weekly tape back-up and off-site storage

Microsoft SQL

- MSDE 2000, SQL 2005, SQL 2008 R2 (clustered)

- SQL database maintenance and backup

Mobile Technologies

- Good Server 7.1 with iPhone and iPad deployment

- Designing, deploying, maintaining, and upgrading BlackBerry Enterprise

Servers

- Patching the Daylight Saving Time patch wirelessly to BB devices

- Moving the BlackBerry SQL database to a dedicated SQL server

- Deploying the Mobile Data Service (MDS) for BlackBerry Servers

Citrix

- Implementation of Citrix Presentation Server Farm

- Publishing applications

- Citrix license recovery

Network/Messaging Protocols

- TCP/IP

- IPX/SPX

- SSL/TLS

- SMTP

- IMAP

- POP3

- DHCP

- DNS

- FTP

- Telnet

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