08/28/2026 updated

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60 % partially available

Senior System Engineer & DevOps Specialist

Marano di Napoli, Italy
Only remote
Bachelor's Degree in Computer Science
Marano di Napoli, Italy
Only remote
Bachelor's Degree in Computer Science

Profile attachments

CV_S.Molisso_ENG_2025.pdf

About me

Expert in designing and managing highly available enterprise infrastructures, with a focus on DevOps automation, system security, and long-term operational reliability. I work on enterprise and mission-critical environments, building platforms that must remain stable, observable, and scalable.

Linux Systems Administration
Approximately 20 years of experience in the administration of Linux systems (Debian, RHEL, CentOS, Ubuntu) and Windows Server environments, including management of high-availability infrastructures, web and application servers, database clusters, and mail servers.

DevOps & Automation
Extensive use of DevOps tools such as Ansible for task automation in multi-node environments, GIT for version control, and Docker for containerization. Centralized management of VMs, containers, and configurations through Ansible playbooks on GitHub.

Cyber Security
Solid knowledge in perimeter security (Fortinet, Sophos UTM, Checkpoint, OPNSense, PFSense, Iptables, Microsoft TMG) and application security, including Vulnerability Assessment and Penetration Testing using tools such as NESSUS, sqlmap, Burp Suite, Metasploit, hashcat, and John The Ripper.

Hypervisors & Virtualization
Proficiency with hypervisor platforms including Proxmox VE, VMware, and OracleVM, with hands-on experience in deploying and managing virtual machines and LXC containers.

Networking & VPN
Advanced knowledge of networking protocols and VPN technologies including VPN IPSEC, PPTP, L2TP, OpenVPN, WireGuard, advanced routing rules, NAT, Port Forwarding, VXLAN over IPSEC, and SIEM/Log Collectors such as Syslog, Rsyslog, Splunk, and Graylog.

High Availability & Load Balancing
Design and implementation of high-availability infrastructures using Apache-Tomcat JK Connector, Apache Reverse-Proxy, Active/Passive and Active/Active Load Balancing with Heartbeat, Pacemaker, Corosync, LVS, and HAProxy.

Databases
Management and administration of multiple database platforms including MariaDB with Galera, PostgreSQL, Oracle, MS SQL Server, MongoDB, and Clickhouse.

Monitoring
Implementation and management of monitoring systems using Nagios, Cacti, Splunk, NTOP, NeDI, and OpManager to ensure infrastructure visibility and alerting.

Backup Solutions
Configuration and management of backup solutions including Proxmox Backup Server, Acronis Cyber Protect, incremental and differential backup policies, Symantec NetBackup, Uranium Backup, and Amanda.

Programming & Scripting
Advanced Bash Shell scripting, MS Batch, VB, and PowerShell scripting for automation and system management tasks.

Web & Application Servers
Installation, configuration, and management of web and application servers including Nginx, Apache, IIS, Tomcat, JBoss, and WildFly.

Mail Servers
Experience with mail server platforms including Zimbra Collaboration Suite, MS Exchange, Kerio, and Merak.

Languages

EnglishGoodItalianNative speaker

Project history

Freelance IT Consultant & DevOps

Collextion Holding
Design, installation, configuration and commissioning of the physical and virtual infrastructure for the company's Core IT services. DevOps activities in synergy with the development department. Key projects include geo-replicated infrastructure with Proxmox, Fortigate/OPNSense firewalls, VXLAN over IPSEC between 3 offices, centralized Ansible playbook management on GitHub, Active Directory, Always On VPN, Proxmox Backup Server, AI implementation on-premise with DELL Server/AMD Epyc/Nvidia TESLA P40 GPU, OLLAMA and OpenWebUI. Technologies: Proxmox VE, Ceph, ZFS, Ansible, Nginx, Apache, ReverseProxy, Google Oauth2, PHP, Redis, MariaDB, LetsEncrypt, HAProxy, OPNSense, Fortigate, Ipsec, OpenVPN, Ubiquity Unifi, Microsoft Always On VPN, Active Directory, GPO, DFS, Nagios, SNMP, Acronis Cyber Protect, Acronis Cyber Infrastructure, Qnap QUTSCloud, Intel Endpoint Management Assistant, OLLAMA, Openwebui.

System Admin Lead

Citynews S.P.A.
Management of the multi-server environment delivering the company's services and responsible for the Office Automation area. Key projects include management of a multi-server infrastructure for over 50 local online newspapers (30 million unique users/month and ~400 million page views), configuration of Proxmox clusters with CEPH storage, deployment and configuration of Linux (Debian) VM and LXC containers via Ansible, automation of Windows client management via Intel EMA and Always On VPN, implementation of a cloud domain for centralized access to resources. Technologies: Ansible, Proxmox, OPNSense, Ceph, HAProxy, Keepalived, Nginx, Let's Encrypt, Unbound DNS, Php-fpm, MariaDB, Galera, Percona, Memcached, Varnish, Graylog, Monit, Munin, OpenVPN, IPSec, Microsoft Active Directory, GPO, Remote Access Server, Direct Access, AlwaysON VPN, Terminal Server, Intel Enterprise Management Assistant (EMA), Ubiquiti.

Linux Systems Engineer

Optima Italia S.P.A.
Improvements, management, maintenance, and monitoring of the company's server infrastructure with a focus on Open Source technologies. Responsible for Cyber Security activities. Key projects include management and monitoring of server infrastructure with Nagios Core and Cacti, Cyber Security (Vulnerability Assessment, Penetration Testing, patch management), implementation of corporate gateways using Fortinet, Sophos, and Checkpoint, development of RADIUS and OpenSIP platforms, creation of high-availability web infrastructures (Apache, Tomcat, HAProxy, WSO2, MariaDB, Galera, FreeRadius, OpenSIP, OpenACS).

System and Security Administrator

Unlimited Software S.R.L.
Research, development, and optimization of new technological solutions based on Open Source platforms for internal use or for clients. System Administrator for companies in the group (Unlimited Software, Unlimited Technology, Marpesia) and system consultancy for customers. Key projects include management of Linux/Microsoft systems for corporate clients, implementation of the first Certification Authority for the Egyptian Ministry of Finance, creation of a Network Analysis system with monitoring and alerting, design of a log management infrastructure for GDPR compliance.

System Administrator and Help Desk

Studio3A S.A.S.
System administration activities (Linux and/or Windows systems) and maintenance of IT systems at the company and for its clients. Key project: System Administrator at SSPA in Caserta - management and maintenance of the LAN (200 hosts), implementation of an Active Directory infrastructure for user and resource management, configuration of Proxy Server (ISA Server 2004), and deployment of McAfee E-Policy Orchestrator antivirus.

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