Nathaniel Chisley Jr.
San Antonio,TX
Summary
Senior network engineering professional with a vast array of experience over a range of environments (WAN, LAN, Cisco plus wireless). Count on multiple positions with recognized employers and contractors implementing Cisco routers/switches, designing, and integrating area networks, responding to emergency situations, and collaborating well with teams both locally and remotely in an integrated fashion to effectively troubleshoot and ensure compliance (company-wide and regulatory per state/federal guidelines). Exceptional technical expertise coupled with proven team building and training skills seeking a more senior level position at an established, well-regarded firm.
Overview
19
19
years of professional experience
Work History
Enterprise Network Manager
Health & Human Services Commission
Austin, TX
05.2023 - Current
- Manages team of staff engineers and contractors responsible for day-to-day perimeter security operations tasks
- Collaborated with other departments to develop comprehensive plans for implementing new technologies or upgrades to existing systems
- Oversee and perform activities associated with operating, planning, and designing networks
- Develop policies and procedures; and evaluate potential network enhancements
- Oversee and provide guidance in troubleshooting and solving complex network problems.
Network Administrator Consultant
The Center for Healthcare Services
05.2021 - 10.2021
- Worked as POC for CHCS for circuit migration to AT&T Switched Ethernet Network on Demand
- Made recommendations on existing wireless infrastructure
- Completed implementation of Extreme Networks Network Access Control solution
- Completed initial migration of SonicWALL standalone firewall to HA pair.
Network Engineer
Datamark, Inc
San Antonio, TX
06.2020 - 05.2021
- Maintained company LANs, WANs, Voice, and wireless networks, including servers, routers, firewalls, load balancers, switches, UPSs, and other hardware
- Created, managed, and maintained Network, Server, and PC health for clients (as defined by SLA)
- Provided executive-level updates to internal customers detailing project initiatives, incidents, and service-level performances
- Coordinated and managed external vendors to ensure delivery of project and managed services
- Provided technical leadership and guidance to the team, must be willing to develop the technical skills of other team members whenever possible
- Maintained system performance by performing system monitoring and analysis, and performance tuning; troubleshooting system hardware, software, networks, and operating and system management systems to determine root cause.
Network Engineer 3
Harland Clarke Holdings
San Antonio, TX
06.2017 - 07.2019
- Responsible for providing senior guidance and assistance with day-to-day network security engineering and support of current and future wide area data networks to include engineering, deploying, and maintaining corporate infrastructure devices
- Maintained corporate network security devices (firewalls, ISE, IPS/IDS) across Harland Clarke Holdings (HCH) and served as senior a member of a team
- Provided customer service and assistance, incident and problem resolution related to voice and/or data (LAN and WAN) network issues
- Trains and mentors Network Analysts, Sr Network Analysts and System Administrators on network standards and principles
- Assisted in the design and maintenance of Harland Clarke's Enterprise-Wide Area Network (WAN).
Data Network Security Specialist
Convergys Corporation
Dallas, TX
12.2014 - 06.2017
- Responsible for the design, project management, and support for the security of the Convergys Corporate Data Network
- Responsible for the business requirements and networking standards for the corporate network
- Provided secure high-level design solutions that conform to the overall secure system requirements
- Serves as project manager for Data Security Technicians with the responsibility for overall development of project plans and supports all existing processes within the area of the assigned responsibility
- Responsible for the design of secure new networking within the corporate network
- Responsible for the management and support of Convergys' complex firewall (Cisco, CheckPoint, and Palo Alto) and IDP/IPS environment
- Responsible for the management and support of Remote Access, VPNs, NTP, DNS, Email Gateways, and ACS solutions.
Network Administrator/Engineer 2
Excentus Corporation
Dallas, TX
05.2013 - 12.2014
- Provided technical support for local area networks, wide area networks and Internet connections
- Configured and maintained routers, switches, firewalls, wireless networks, and other network devices
- Diagnosed network issues using tools such as packet sniffers and protocol analyzers
- Monitored network performance to determine adjustments needed
- Researched, recommended, configured, and supported hardware and software for multiple departments
- Implemented security measures such as firewalls, encryption technologies and access control lists to protect data from unauthorized access
- Oversaw VPNs to deliver secure virtual network access to remote users.
Private I.T. Consultant
Dallas, TX
11.2012 - 12.2014
- Provided Managed IT Services for various customers throughout DFW metro.
Sr. Security Engineer
Experian Information Solutions/TAPFIN Total Workforce Solutions
Allen, TX
10.2012 - 05.2013
- Managed security and VPN policies on Checkpoint, Cisco, and Juniper firewalls
- Developed security audit, assessment and penetration testing tools and procedures
- Validate and test security designs to produce detailed engineering specifications with recommended vendor technologies
- Participated in the development of security strategies that take advantage of network-based capabilities while keeping assets secure from unauthorized access
- Provided technical consultation for systems development projects and develops general and customized security configurations.
Sr. Network Engineer/Network Manager
Texas A&M University
Kingsville, TX
03.2012 - 10.2012
- Managed team of engineers responsible for day-to-day network operations tasks
- Designed and implemented short- and long-term plans to ensure network capacity met requirements
- Conducted regular maintenance activities on all network devices including routers, switches, firewalls, and load balancers
- Monitored and analyzed network performance to identify potential issues or areas of improvement
- Installed and configured various networking components such as routers, switches, firewalls, wireless access points
- Provided technical support for internal users experiencing difficulties with their networks or systems.
Network Engineer
C Spire Wireless/TEKsystems
Ridgeland, MS
09.2011 - 03.2012
- Configured and maintained network hardware, including routers, switches, firewalls, and wireless access points
- Administered Solar Winds Orion software used to monitor and maintain C Spire's network
- Provided high-level connectivity support for corporate and business partner systems
- Maintained switch configurations, ensuring proper flow of data between the LAN and WAN networks
- Satisfied Sarbanes-Oxley and PCI compliance requirements in all areas of the network.
Network Security Engineer 3/Site Task Lead
US Army/TKC Global, LLC/Avaya Government Solutions
Fort Sam Houston, TX
04.2009 - 09.2011
- Served as shift lead managing network security engineers with various skill sets and backgrounds
- Served as project lead for Medical Command's (MEDCOM) Enterprise Network Protection Services (ENPS) project, this encompassed taking over management of various Army Medical Treatment Facilities' (MTFs) security suites
- Supported the United States Army Medical Information Technology Center's (USAMITC) Medical Network Operations and Security Center's (MEDNOSC) LAN and TLA security systems
- Maintained working relationship between USAMITC MEDNOSC and various DoD entities
- Planned, designed, installed, and supported the network security equipment for six messaging centers and 65 plus medical facilities located all around the world
- Provided daily administration and troubleshooting help with firewalls, VPN connections, IAVA/Anti-virus updates, IOS upgrades and general network security issues
- Served as contract lead directly managing 11 individuals in various departments employed by TKC Global Solutions
- Satisfied HIPAA and PCI compliance requirements in all areas of the network.
Network Systems Administrator
US Air Force/The Centech Group, Inc./General Dynamics I.T./ Computer Sciences Corporation
Barksdale AFB, LA
08.2005 - 04.2009
- Provided assigned customers with Tier 1 systems and network support for all AFNOSC area of responsibilities-ensures all users' network accounts are set up and maintained
- Installed, configured, and maintained servers, local workstations, and notebooks-ensures successful connection and compliance to local network infrastructure security guidelines to meet AFNOSC mission essential operations
- Performs local switch configuration, small computer repair, and network troubleshooting to enhance the network infrastructure quality of service
- Installs network updates to ensure overall network infrastructure integrity and security
- Provided Active Directory and Exchange administration on Air Force's global network
- Configured and maintained network hardware, including routers, switches, firewalls, Windows servers, and wireless access points
- Performed local switch configuration, small computer repair, and network troubleshooting to enhance the network infrastructure quality of service.
Network Administrator
Sytel, Inc.
Bethesda, MD
01.2005 - 08.2005
- Managed network accounts and access privileges including creation, modification, and deletion
- Created and managed PC and server images using Ghost software
- Provided management of specialized server base applications
- Minimized vulnerability of servers to attack
- Supported a Rational Rose environment
- Installed and managed Windows NT Server, 200 and 2003 servers in a large corporate network
- Successfully configured IIS 6.0 web servers on Microsoft operating systems
- Repackaged software packages for deployment.
Communications Computer System Operator
United States Air Force
- 12.2004
- Honorable Discharge
Education
B.S. – Information Technology -
Western Governor's University
11.2021
Skills
- Cisco Technologies
- Network Monitoring Solutions
- VPN Configurations
- Security Logs
- Remote Access Support
- Network Security Management
- Firewall Configuration
- Team Leadership Abilities
- Disaster Recovery Planning
- Virtualization Technologies
- LAN and WAN Administration
- VoIP Systems
- Hardware Installation
Timeline
Enterprise Network Manager
Health & Human Services Commission
05.2023 - Current
Network Administrator Consultant
The Center for Healthcare Services
05.2021 - 10.2021
Network Engineer
Datamark, Inc
06.2020 - 05.2021
Network Engineer 3
Harland Clarke Holdings
06.2017 - 07.2019
Data Network Security Specialist
Convergys Corporation
12.2014 - 06.2017
Network Administrator/Engineer 2
Excentus Corporation
05.2013 - 12.2014
Private I.T. Consultant
11.2012 - 12.2014
Sr. Security Engineer
Experian Information Solutions/TAPFIN Total Workforce Solutions
10.2012 - 05.2013
Sr. Network Engineer/Network Manager
Texas A&M University
03.2012 - 10.2012
Network Engineer
C Spire Wireless/TEKsystems
09.2011 - 03.2012
Network Security Engineer 3/Site Task Lead
US Army/TKC Global, LLC/Avaya Government Solutions
04.2009 - 09.2011
Network Systems Administrator
US Air Force/The Centech Group, Inc./General Dynamics I.T./ Computer Sciences Corporation
08.2005 - 04.2009
Network Administrator
Sytel, Inc.
01.2005 - 08.2005
Communications Computer System Operator
United States Air Force
- 12.2004
B.S. – Information Technology -
Western Governor's University
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