Alton Davis Email & Phone Number

Oakland, Ca, Us

• Oversaw the migration from legacy firewall systems to Palo Alto firewalls, ensuring a smooth transition and improved network security.• Oversaw daily management and configuration of PAN firewalls through Panorama, ensuring network security and compliance.• Designed and implemented high availability and disaster recovery solutions for Palo Alto firewalls to minimize downtime and ensure business continuity• Implemented and optimized Palo Alto firewall policies and rules to effectively protect the network from cyber threats• Collaborated with cross-functional teams, including InfoSec and network operations, to identify and mitigate security vulnerabilities and incidents.• Led the integration and migration project from Cisco AnyConnect to PAN Global Protect.• Spearheaded a $4M infrastructure overhaul, ensuring seamless implementation and minimal disruption.• Designed and deployed a robust virtual data center in AWS cloud, including Virtual Private Cloud (VPC), Public and Private Subnets, Security Groups, Network Access Control Lists, Route Tables, and Elastic Load Balancer, to support enterprise application hosting.• Built and managed various AWS resources such as VPC EC2, RDB, S3, IAM, EBS, Security Group, Auto Scaling, and RDS to optimize infrastructure performance and scalability.• Effectively managed IP and DNS resources using Infoblox, ensuring accurate and efficient network operations.• Efficiently managed and maintained core Cisco infrastructure devices, including routers, switches, and wireless LAN controllers (WLCs), utilizing automation to streamline operations.• Implemented user authentication and policy management using Cisco ISE, enhancing network security and access control.• Conducted system hardening measures to align the network infrastructure with industry standards and best practices, ensuring a secure and resilient network environment.

San Francisco, Ca, Us

• Spearheaded the design and implementation of Arista network infrastructure as the lead engineer, ensuring seamless connectivity and optimal performance for enterprise clients.• Successfully transformed a multisite network from L2L to DMVPN utilizing open source FRR, resulting in improved network performance and scalability.• Led the design and implementation of Palo Alto Firewall solutions, ensuring the security and integrity of the network infrastructure.• Conducted thorough analysis and assessment of network security requirements, recommending and implementing appropriate Palo Alto Firewall configurations.• Developed and maintained firewall policies, ensuring adherence to industry best practices and compliance requirements.• Implemented advanced networking features such as VPC peering, Transit Gateway, and Direct Connect, enabling secure and efficient communication between different networks.• Resolved complex network issues and incidents, utilizing troubleshooting skills and in-depth knowledge of AWS networking services.• Demonstrated proficiency in utilizing GitHub for efficient repository creation and version control, ensuring seamless collaboration and code management.• Leveraged Docker and Kubernetes for containerization, streamlining application deployment and enhancing scalability and reliability.• Employed Chef for provisioning and automating the deployment of packages, reducing manual effort and improving efficiency.• Conducted comprehensive penetration testing to assess and fortify internal systems, ensuring robust security measures and minimizing vulnerabilities.• Implemented network monitoring solutions using Prometheus and Grafana, enabling proactive identification and resolution of network issues, ensuring optimal performance and availability.

San Francisco, California, Us

• Successfully migrated Company from traditional Site-To-Site VPNs to the more secure and efficient IKEv2 DMVPN protocol.• Led the transition from F5 VPN to Cisco AnyConnect, improving remote access capabilities and enhancing overall network security.• Managed and configured highly intricate networks with external points, ensuring seamless connectivity and redundancy.• Deployed and maintained cutting-edge next-generation firewalls, safeguarding the organization against evolving cyber threats.• Ensured seamless connectivity across multiple sites by maintaining and optimizing the implementation of industry-standard routing protocols such as OSPF and BGP.• Proactively monitored and maintained the health of over 200 network devices and servers, promptly addressing issues to minimize service disruptions.• Achieved an exceptional 99.999% availability rate for all critical business units, ensuring consistent and reliable network performance.• Streamlined operations by automating repetitive tasks through the development of Python scripts, increasing efficiency and reducing manual errors.• Established secure VPN connections with third-party vendors, enabling secure and seamless collaboration.• Successfully managed both AWS and GCP cloud infrastructures, ensuring secure and scalable cloud environments.• Implemented robust PKI authentication for edge devices connecting over the internet, enhancing network security and protecting sensitive data.• Ensured compliance with HITRUST/SOX regulations, implementing necessary controls and security measures.• Facilitated regular penetration tests of network devices and servers, ensuring corporate policies were enforced and vulnerabilities were identified and addressed.• Implemented Network Access Control (NAC) to control guest access, profile devices, and manage BYOD (Bring Your Own Device) policies, strengthening network security and mitigating risks.

San Jose, Ca, Us

• Designed and supported various types of IKEv1 and IKEv2 VPNs, including SSL VPN, AnyConnect, GetVPN, DMVPN, FlexVPN, VTI-Based, MPLS, and Site-To-Site VPNs. • Demonstrated expertise in implementing and troubleshooting PKI-based solutions ensuring secure and efficient data transmission• Led the design, implementation, and maintenance of Cisco VPN solutions for a diverse range of clients.• Successfully managed and resolved complex VPN connectivity issues, ensuring uninterrupted network access for users.• Expertly troubleshooted routing issues across multi-site networks, ensuring seamless connectivity and optimal network performance.• Delivered end-user support for a wide range of platforms including Mac, Windows, Linux, and mobile devices, resolving technical issues and providing timely solutions.• Developed and maintained documentation, including network diagrams, configurations, and troubleshooting guides, to facilitate efficient VPN management.• Provided technical expertise and guidance to junior engineers, fostering their professional growth and development.• Conducted product analysis and actively participated in bug submission for security products, contributing to the improvement of product quality and enhancing overall security posture.

• Successfully configured IPSec site-to-site tunnels with partner companies and ISPs, ensuring secure and reliable communication channels for seamless collaboration.• Expertly configured firewalls and implemented content filters to enhance network security, protecting against unauthorized access and potential threats.• Implemented and supported multisite Cisco VoIP and Unity Connection, enabling seamless communication and collaboration across multiple locations.• Provided comprehensive support for presence servers and Cisco Jabber, ensuring optimal user experience and efficient communication.• Configured tiered switch environments, optimizing network performance and ensuring seamless connectivity across different network layers.• Responsible for backbone configuration and support, ensuring high availability and reliability of network infrastructure.• Provided mobile device support for users, troubleshooting and resolving technical issues to ensure seamless mobile productivity.• Supported users in Mac, Windows, and Unix environments, resolving technical issues promptly and efficiently.• Streamlined operations by automating tasks using Python scripting, improving efficiency and reducing manual effort.• Designed scalable networks and successfully brought up new sites, ensuring efficient and reliable network connectivity to support business growth.

San Jose, Ca, Us

• Successfully installed and configured ASA 5500 series firewalls, ensuring robust network security and protecting against external threats.• Configured IDS/IPS systems, enhancing network security and detecting and preventing potential intrusions.• Set up remote access and SSL/Anyconnect VPN, enabling secure and seamless remote connectivity for users.• Conducted traffic monitoring and analysis, identifying network bottlenecks, optimizing performance, and ensuring efficient network utilization.• Performed internal and external vulnerability assessments, identifying potential security vulnerabilities and implementing necessary safeguards.• Installed and configured ACS servers for authentication, ensuring secure access control and user authentication.• Expertise in Cisco UCS deployments, ensuring efficient and reliable server infrastructure to support business operations.• Led the build-out of data centers, overseeing the design and implementation of scalable and highly available infrastructure to support business growth.

San Jose, Ca, Us

• Proficient in the installation, maintenance, and troubleshooting of Cisco Unified Communications Manager (CUCM), ensuring reliable and efficient communication infrastructure.• Integrated users into CUCM using LDAP, streamlining user management and authentication processes.• Configured voice gateways to facilitate seamless communication between different networks and protocols.• Implemented various calling features in CUCM, enhancing communication capabilities and improving user experience.• Configured Unity Connection, enabling voicemail and unified messaging services for users.• Expertise in configuring calling search spaces, hunt groups, meetme, pickup groups, BLFs, extension mobility, and MOH, optimizing call routing and enhancing user productivity.• Successfully integrated Cisco Telepresence with CUCM, enabling high-quality video conferencing and collaboration.• Experienced in virtualizing servers on vSphere, ensuring efficient utilization of resources and scalability.• Proficient in troubleshooting routing issues on telephony infrastructure, identifying and resolving network connectivity problems to maintain uninterrupted communication.• Implemented Quality of Service (QoS) on the network, prioritizing voice traffic to ensure high-quality and reliable communication.• Skilled in router and switch configuration and troubleshooting, ensuring optimal network performance and stability.• Successfully performed configuration and updates to major ISP's Cisco network devices, ensuring secure and reliable network connectivity.

Honolulu, Hi, Us

Day to Day:•Collaborated with ISP to effectively manage and optimize MPLS network spanning 35 locations, ensuring reliable and efficient connectivity.•Managed and maintained Cisco routers, switches, and ASA firewalls, ensuring secure and stable network infrastructure.•Administered VoIP and Unity systems, overseeing the configuration and troubleshooting of voice communication services.•Executed bulk administration and deployment using BAT, streamlining the provisioning process and ensuring consistent configurations.•Configured various calling features, such as calling search spaces, hunt groups, meetme, pickup groups, BLFs, extension mobility, and MOH, to enhance call routing and user experience.•Installed and administered VMware vSphere, facilitating efficient virtualization and resource management.•Performed maintenance and Active Directory functions for Server 2003/2008, ensuring the smooth operation of directory services.•Provided daily support and troubleshooting for Exchange 2007/2010 environment, ensuring reliable email communication.•Supported Office Communicator Server, facilitating efficient internal communication and collaboration.•Provided iPhone/iPad support to users, ensuring seamless mobile device integration and productivity.Projects:•Conducted random penetration testing on the network to identify and address potential security vulnerabilities.•Designed and configured a wireless network optimized to support mobile and wireless devices, improving connectivity and user experience.•Implemented router redundancy in key locations, enhancing network resilience and minimizing downtime.•Successfully upgraded the phone system to VoIP, improving communication capabilities and reducing costs.•Phased out outdated PIX firewalls and upgraded to ASA's, ensuring enhanced security and compatibility with modern network requirements.•Established VPN tunnels to partner companies, enabling secure and efficient communication and collaboration.

Emeryville, California, Us

• Demonstrated expertise in Cisco router and switch configuration, including advanced routing protocols, IPSec VPN, remote access VPNs, SwitchPort Security, VLAN isolations, security, and VoIP configuration.• Successfully configured Cisco wireless networks using WLAN Controllers, ensuring reliable and secure wireless connectivity.• Proficiently configured ASA Firewalls and implemented security measures, including IPS/IDS, to protect network infrastructure.• Configured ASA 5500 Series to support telecommuters, ensuring secure remote access and connectivity.• Provided comprehensive onsite and remote support and administration for 30 servers across 5 locations, ensuring optimal performance and availability.• Supported and configured end user Blackberry devices using BES, enhancing mobile productivity and communication.• Administered VoIP systems using CUCM, ensuring efficient and reliable voice communication services.• Provided user support in an Exchange 2003 environment, resolving issues and ensuring seamless email communication.• Performed system backups using Symantec Backup Exec and user backups using DLO, ensuring data integrity and disaster recovery readiness.• Installed and maintained up-to-date virus protection using Symantec Endpoint Protection, safeguarding network and data security.• Created and managed a virtual server environment using VMware ESX 3.5, optimizing resource utilization and scalability.• Provided daily end user support for 150+ users, resolving technical issues and ensuring uninterrupted productivity.• Proactively reviewed server event logs to identify and address any errors or issues, ensuring system stability and performance.• Built new laptops for new employees, ensuring they have the necessary tools and equipment for their roles.• Monitored network performance using MRTG, Solar Winds, and Wireshark, proactively identifying and resolving potential issues to maintain optimal network performance.

Nashville, Tn, Us

• Provided exceptional local and remote support for a user base of 5000, ensuring timely resolution of technical issues and maximizing user productivity.• Expertly troubleshooted hardware and software issues, employing a systematic approach to identify and resolve problems efficiently.• Installed and maintained local and network printers, ensuring optimal performance and availability for seamless printing operations.• Effectively diagnosed and resolved LAN/WAN connection issues, ensuring uninterrupted network connectivity for users.• Configured routers and switches to optimize network performance and facilitate efficient data transmission.• Provided telephone support to users across the United States, utilizing a ticketing helpdesk system to track and resolve user inquiries and issues.• Offered remote assistance to users, leveraging remote access tools to diagnose and resolve technical problems promptly.• Proficiently imaged and configured machines for new users using Symantec Ghost, ensuring consistent and efficient setup of workstations.• Collaborated with cross-functional teams to streamline imaging and configuration processes, optimizing onboarding efficiency and user experience.

Atlanta, Georgia, Us

• Provided comprehensive local and remote support for a diverse user base of 150 individuals, ensuring prompt resolution of technical issues and minimizing downtime.• Successfully maintained the integrity and functionality of the network, implementing proactive measures to optimize performance and enhance security.• Demonstrated expertise in hardware and software installation and maintenance, ensuring seamless operation and compatibility across systems.• Implemented robust network security measures, including firewalls, antivirus software, and encryption protocols, to safeguard sensitive data and protect against cyber threats.• Proactively managed operating systems, diligently updating and patching them to ensure optimal performance, security, and compatibility with software applications.• Proficiently diagnosed and resolved network errors, employing advanced troubleshooting techniques to identify and rectify issues promptly.• Installed and maintained both local and network printers, ensuring reliable and efficient printing capabilities for users.• Leveraged remote desktop and assistance tools to provide timely and effective support to users, resolving technical issues remotely and minimizing disruptions to workflow.

Associates Degree, Network And System Administration/Administrator

Education record

Education record