Dennis Whitfield Email and Phone Number

• Support Cloud Architects to provide operations and migration services that allow organizations/clients to style the availability and delivery of cloud computing services following business and technical requirements. • Responsible for the configuration and support of backbones connection over Direct Connect (AWS), ExpressRoute (Azure), and an array of direct BPE connection handled over Cisco Nexus 9504.• Update the PAC file request which utilizes web browser to determine the route a file should be directed External /Direct.• Deep understanding of cloud technologies, such as Infrastructure as a Service (IaaS), Platform-as-a-Service (PaaS), Software-defined networks (SDN), Network Functions Virtualization (NFV), Open stack, and other emerging technologies.• Knowledge of Carrier Services – WAN Circuits, MPLS, VPNS, VRFs, Frame Relay, Point to Point, OCx, DS3, E/T1s and Ethernet.• Recommending best practice by cleaning up AWS Security Groups from CIDR Block that are vulnerable in the environment.• Responsible for assuring 99.9999 network availability through redundancy protocols, redundant hardware and careful planning of network changes.• Deep understanding of cloud technologies, such as Infrastructure as a Service (IaaS), Platform-as-a-Service (PaaS), Software-defined networks (SDN), Network Functions Virtualization (NFV), and other emerging technologies.• Installing Intermediary Certificate and Treasury Root CA in a Linux environment, a Firewall application called AlgoSec.• Creating DNS record and DDNS in Infoblox when requested by system owners for their production.• Update the PAC file request which utilized web browser to determine the route a file should be directed External /Direct• Primarily responsible for design and maintenance of mission critical infrastructure, consisting of Cisco, F5, Palo Alto, Arista devices including SDN.

• Performs technical analyses of software, hardware and transmission facilities using various diagnostic tools in support of efficient network operations.• Configures, Installs, supports and/or maintains LANs and/or WANs; evaluates and recommends networking product and software upgrades.• Installing, configuring, supporting network equipment including routers, proxy servers, switches, WAN accelerators, DNS and DHCP.• Updating network equipment to the latest firmware releases.• Familiarity with Virtual Private Cloud (VPC) architectures.• Fluent with network protocols (HTTP, HTTPS, FTP, FTPS, SFTP, TCP/IP)• Deep knowledge of Antivirus, Endpoint protection, and Cloud-based endpoint protection solutions.• Experience with Networking and Linux is required; a background of Ansible/Chef/Puppet, phone systems and Windows Server.• Basic understanding of managing in an IaaS/PaaS is required; familiarity of Amazon Web Services (AWS).• Experience with entire Cisco Meraki stack (route, switch, firewall, wireless and security cameras.• Sound knowledge and deploying Cisco Prime wireless heat maps, wireless controllers' series 5500.• Ran CAT 5 and fiberoptic cable for computer network and phone systems.• Configuring and Installation of Brocade Switches by implementing VLAN over OSPF• Responsible for user compliance, device usage acceptability and network allowance

• Provide support for our internal Global infrastructure.• Increased domain levels by closely managing windows domain move.• Successfully engineered a virtual private network solution utilizing Windows 2000 servers.• Administer and develop existing multiple network location setup. Configure and monitor virus protection at the network and user level.• Responsible for installation and repair activities on the DSLAM network.• Configured TCP/IP, DHCP, WINS and DNS.• Managing IP allocation & ensuring minimal downtime of the machine. Configuring server for fault tolerance with User security and Disk space Management to optimize the server utilization.• Monitoring network maintenance activities and ensuring prompt troubleshooting network problems to achieve maximum up time.• Manage Modem Backups.• Network Security New User Access Active Directory, Group Policy• Rewrote and updated group policy with new domain move and domain level raise• Monitored stability of network and wireless services to deliver comprehensive stability• Performed system maintenance and upgrades, including patches, service packs, hot fixes and new security configurations• Ensured continuity of computer and telephone system services for users through technical expertise, assistance and project coordination• Configured networks for smooth, reliable operation to meet business processes and objectives• Provided planning for annual budgets to fund IT projects and controlled spending within budget• Configured, monitored and maintained email applications and virus protection software• Oversaw patch testing and deployment, script network software pushes and uninstalls• Collaborated with network administrator in moving private folders to new exchange servers, including off-site secondary locations• Reviewed network settings and made immediate updates, which improved overall security measures

Key Functions:•Installed, configured, and maintained the functionality of company desktop systems, together with peripheral appendages and software.•Kept in constant touch with vendors to resolve problems as quickly and efficiently as possible.•Provided computer system support for both staff and customers.•Ran regular checks, tests, and tracking procedures to prevent or identify problems.•Instructed employees on extending life of computer system through proper use.•Performed routine maintenance on all user accounts, data files, etc.•Installed or advised installation of upgrades to prevent malfunctioning.