Andreas Chrisafis Email & Phone Number

Dubai, United Arab Emirates

Cyprus

• Designing Network Enterprise Solutions.• Handling the Modernization Project of all the Network Devices in the Company’s production environment (Planning, Configuration, Documentation).• Implementing Solution using vendors such as FortiGate, Cisco (Firewalls, Switches).• Very good understanding of Networking Principals and Protocols.• Responsible for keeping all the documentation up to date of all new solutions and current network Infrastructure.• Responsible on troubleshooting 1st/2nd level connectivity issues on production environment related to Network Devices such FortiGate, Cisco (Firewalls, Switches).• Performed on-site support as well as physical maintenances and operations, at Equinix Datacenters in London (LD4) – Remote Smart hands.• Experience on configuring/managing Active Directory Users, Group Policies, Windows System Update Services.• Experience on setting up new Domain Controllers along with DNS and DHCP.• Responsible for the communication of all the ISP of the Infrastructure.• Experience on AWS Cloud Infrastructure – Creating new EC2 Instances, Configuring Entries in Route 53.• Knowledge on how to create new email accounts on Office 365 Admin Center, assigning specific permissions and licenses to specific mailboxes, configure Read/Write or Send As permissions, converting user mailboxes to shared mailboxes.• Administration of SharePoint, by creating new sites and assign members to each site.• Understanding and creation of PowerShell scripts to automate certain functionalities.• Expert knowledge on how to setup, maintain and utilize all the features of PRTG Network monitoring.• Very good knowledge on Windows Server 2016/2019/2022 administration.

Cyprus

Limassol (Lemesos), Cyprus

• Configuring Aruba/HP Switches (VLAN, Port Configuration, Spanning tree).• Participated in IT Projects and new solutions.• Configuring/Managing/Monitoring WatchGuard Firewalls• Configuring/Managing WatchGuard Centralized Management• Configuring/Managing/Monitoring Synology File Servers.• Preparing configuration of a complete Datacenter rack (Aruba/HP Switch, Dell Server, Synology File Server, UPS)• Troubleshooting Tier 2 network and system issues on HPE Switches, DELL Servers, Synology File server, Windows 10 PC and UPS devices.• Assisting Tier 1 support with any escalated issues.• Basic troubleshooting Satellite connectivity issues.• Knowledge on configuring/managing Active Directory Users.• Knowledge on configuring/managing Group Policies• Knowledge on configuring/managing Windows System Update Services• Updated and maintained all the IT documentation for the Tier 2 department, regarding existing issues and IT solutions or projects• Responsible for scheduling equipment replacement and guiding the technician along the remote replacement.• Responsible for remote installation of Datacenter racks (Aruba/HP Switch, Dell Server, Synology File Server, UPS) on specific location (vessels).• Planned and coordinated remote technician for installing Datacenter Racks.• Linux System Administration (Centos 7)• Use of Borg Backup software for backing up Virtual Machines on Linux server• Configuring and managing KVM on Centos 7• Windows System Administration (Windows 10 and Windows Server 2016/2019)

Limassol (Lemesos), Cyprus

• Basic knowledge on AWS Amazon, Azure cloud computing (Creating Virtual Machines – IP whitelisting)• Basic knowledge on how to create new email accounts on Office 365• Configuration of HP and Dell servers iLO/iDRAC (SNMP, Users, Hardware Health)• Basic knowledge on Centos 7 OS administration.• Very good knowledge on Windows Server 2016/2019 administration• Create, delete, manage virtual machines on VMware ESXi.• Create, delete and manage users on the OpenVPN platform.• Create, delete and manage Active Directory user accounts and apply basic group policies to them.• Performed many weekend operations to implement new Network or System solutions• Expert knowledge on how to setup, maintain and utilize all the features of PRTG Network monitoring.• Very good knowledge on how to setup Prometheus monitoring system.• Very good knowledge on how to integrate Prometheus with Grafana• Updated and maintained all the Network and System documentation for existing / new Network and System solutions or projects• Performed on-site support as well as physical maintenance's and operations, at Equinix Datacenters in London and Hongkong (LD4/HK3/HK1) – Remote Smart hands• Responsible for scheduling infrastructure maintenances, as well as organizing specific maintenance instructions for the on-site Equinix engineers.• Very good knowledge on using the Equinix customer portal.• Participated in Network and System team projects and new Network and System solutions or projects• Very good experience and knowledge on implementing and updating Network solutions on devices such as Cisco Routers/Switches/Firewalls, Arista switches, Mikrotik switches and Juniper Routers and Firewalls.• Responsible on troubleshooting 1st/2nd level connectivity issues on production environment related to Network Devices such Arista Switches, Cisco Routers/Switches, Mikrotik Switches, Juniper MX204 Routers, Juniper SRX Firewalls.• Participated on designing Network and System Solutions.

Cyprus

• Very good experience on using Network Monitoring Systems such PRTG, Cacti, LibreNMS.• Experience on troubleshooting 1st/2nd level connectivity issues on production environment as well as office related connectivity issues, related to Network Devices such Arista Switches, Cisco Routers/Switches, Mikrotik Switches, Juniper MX240 Routers, Peplink Routers.• Experience on implementing and updating Network solutions on devices such as Cisco Routers/Switches, Arista switches and Mikrotik switches. • Participating in Network team projects and new Network solutions or projects. • Maintaining Network documentation updated for existing / new Network solutions or projects• Performing on-site support as well as physical maintenance's and operations, at Equinix Datacenters in London• Responsible for NOC Weekly Operations o Generate and manage Network infrastructure reports o Checking devices resources o Troubleshooting connectivity issues o L1/L2 network support• Basic knowledge on VMware ESXi. (Install virtual network devices)

Limassol

1. Teaching the basic principles of Robotics.2. Guiding secondary school students to use the robotic equipment properly.3. Preparation of students for the Robotics Olympiad and other robotic competitions.

Limassol

1. Teaching the basic knowledge and concepts of C++ programming language.2. Helping students with difficulties through practicing on Microsoft Visual C/C++.

Cyprus

1. Maintenance of Computer Systems/servers: Installing patches software/security updates as per the audit results of the company.2. Verifying Open ports “services” using nmap on IT systems of MTN Cy.3. Installing/Configuring Network Devices. a) Rearranging addressing plan on management interfaces of IT network elements, switches, routers, firewalls. b) Configuring home CPEs (MTN DSL) for demo purposes on shops (check internet service, configure securely Wi-Fi). c) Familiarizing with dynamic protocols in practice via confirming the correct operation of OSPF on routers serving the internal IT network of MTN Cy.4. Establishing Technical Solutions. a) As part of the service delivery team, i was participating in the configuration archival, documentation (physical, topology maps) of delivered solutions. b) Following step by step procedures in order to clean/erase configuration on “returned” network devices (Routers, switches, home CPEs).5. Troubleshooting basic connectivity scenarios on internal IT environment at MTN Cy. a) PC without internet service. b) PC unable to register on domain. c) V-LAN unable to “reach” specific endpoints.

Bachelor’S Degree, Computer Engineering, 10.00

Activities and Societies: Member of Robotics Automated Lab Peer Tutor

High School, Computer Science, 18.3