Hallison Liberato Email & Phone Number

Federal District, Brazil

Rio De Janeiro, Brasil

Focused on network security, with experience in the implementation and administration of solutions such as CISCO ASA, CISCO Firepower, Fortinet, and Cisco ISE to protect the integrity of systems and data.Working at TIVIT in partnership with ENEL, I have focused on the security and efficiency of network infrastructure. My responsibilities range from system security to hardware maintenance and optimization, positioning me as a versatile professional in network administration and information security.

Rio De Janeiro, Brasil

Responsible for monitoring and troubleshooting an extensive inventory of approximately 8,000 network devices, ensuring continuous and reliable operations.Specialist in resolving Backbone IP issues, utilizing protocols such as BGP and OSPF. Also experienced in SkyEdge Satellite networks and SDH/DWDM technologies.Extensive experience working with a diverse range of equipment from various manufacturers, including Cisco, Juniper, HP, Huawei, Nortel, and Enterasys.During my time at Petrobras, I was involved in managing and troubleshooting a highly complex and diverse network environment. This role required deep technical knowledge and the ability to quickly adapt to different technologies and protocols, reinforcing my expertise in large-scale network administration.

Rio De Janeiro, Brasil

Specialized in upgrading and configuring VoIP systems using tools like CUCM and Call Manager Express.Responsible for monitoring, configuring, and updating network equipment using platforms like CACTI and Spectrum to ensure optimized performance.Administered and configured network security solutions through CISCO ASA Firewall, ensuring system integrity and security.Proficient in troubleshooting and routing with OSPF and BGP protocols to ensure efficient and reliable network communication.Conducted technical analyses and configuration adjustments on equipment from various manufacturers, including CISCO, Juniper, and HP.My experience at VALE (in partnership with TCS) enhanced my expertise in network administration and system security. I contributed to maintaining and improving a complex network infrastructure, utilizing a variety of tools and protocols to ensure robust and secure network performance.

Rio De Janeiro, Brasil

Leadership in project management and upgrades at Markel International Reinsurance, focusing on network equipment and technological solutions, including Brocade and CISCO devices.International collaboration with teams in England, the USA, Bermuda, Colombia, and Argentina, contributing to network issue resolution and infrastructure optimization.Managed and administered fixed and mobile telephony systems, specializing in CISCO IP Phone and Call Manager technology.