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Hi, I am Pasquale

Pasquale Maccariello

Linux Systems Administrator at SWU Stadtwerke Ulm/Neu-Ulm GmbH

I am a passionate IT Systems and Network Administrator with over 20 years of working experience.

Leadership
Team Work
Communication
Hard Working
Fast Learner
Problem Solving

Skills

Networking

Networking has been crucial in my professional experience, allowing me to collaborate on large-scale networks. I’ve gained insights and hands-on experience in managing complex infrastructures, enhancing my technical skills and enabling me to effectively troubleshoot and optimize performance in these networks.
Cloud Computing

Cloud Computing is crucial for modern businesses. My experience with major providers like Google Cloud, AWS, and Azure has given me insights into their features and strengths. Collaborating on projects has enhanced my understanding of cloud security, scalability, and cost management for effective solutions.
Kubernetes

I am a certified Kubernetes Administrator with training and assessment validating my expertise. I can efficiently deploy and manage Kubernetes clusters, ensuring smooth operation. I also optimize application performance, scale as needed, and troubleshoot any operational issues.
Docker

Deployment of Docker containers is vital in software development, allowing teams to package applications and dependencies. I have extensive experience with multi-stage build processes for efficient, lightweight images and multi-architecture builds for compatibility across various environments.
Linux

As a Linux Systems Administrator, I understand various distributions and configurations for optimal performance. I’m skilled in complex bash scripts to automate tasks, enhance productivity, and maintain software packages. I ensure applications are updated, secure, and reliable while troubleshooting system issues for improved uptime and efficiency.
Git

I am experienced with git-based development, primarily using GitHub for its issue tracking and collaboration features. For sensitive projects requiring security, I use my self-hosted git server to keep my code and documents confidential and under my control.

Experiences

1
Senior Linux Systems Administrator
SWU Stadtwerke Ulm/Neu-Ulm GmbH

Feb 2022 - Present, Ulm, Germany

The SWU Stadtwerke Ulm/Neu Ulm GmbH offers a wide range of products and extensive services in the areas of energy, drinking water, telecommunications, and mobility in the city and surrounding areas.

Senior IT Consultant, Systems/Networks Administrator
Systemzwo GmbH

Jan 2013 - Jan 2022, Ulm, Germany

The systemzwo group, headquartered in Ulm, is an independent, owner-managed IT consulting and service company.

Responsibilities:
  • Provide technical presales support.
  • Set up, configure, and manage complex VPN and firewall infrastructure.
  • Plan and execute complex networking migrations.
  • Offer 2nd and 3rd level support for customers.
  • Maintain complex VMware clusters.
  • Install, configure, and maintain various services under Linux (such as web, FTP, and mail) and Windows Server (such as Active Directory, DNS, and NPS).
  • Install, configure, and maintain services as Docker containers (such as websites, LoRaWAN backend servers, and custom services).
  • Develop LoRaWAN hardware on custom PCBs for electricity metering and custom LoRaWAN field testers.
  • Provide IT consulting for various customers.
  • Set up and maintain virtual and physical Linux servers on x86_64, including high availability.
  • Administer Linux servers (RedHat Enterprise and other Linux distributions) on x86_64 following ITIL processes.
  • Manage incidents (2nd level support) and problems (3rd level support) for RedHat Enterprise and other Linux distributions.
  • Perform Linux security hardening and develop complex bash scripts.
  • Handle change, release, and configuration management.
  • Accept faults, analyze errors, and troubleshoot as part of incident management, including on-call service.
  • Ensure smooth system operation of the IT infrastructure in the company’s data center, focusing on server hardware, storage, and virtualization.
  • Maintain the Microsoft Azure and Office 365 environment, and integrate cloud infrastructure services.
  • Administer, monitor, and solve problems for various IT security devices like firewalls, WAF, and proxy systems.
  • Install, configure, and administer ESXi (versions 4.x to 7.x) clusters with different storage systems (DELL, NetAPP, HP, IBM/Lenovo).
  • Install, configure, and maintain backup and disaster recovery solutions like Veeam.
  • Set up and administer complex and redundant network, firewall, and VPN solutions.
  • Plan and implement various network migrations.
  • Provide 3rd level support for different customer IT environments.
2
3
Unix/Linux Systems Administrator
Wilken Rechenzentrum GmbH

May 2011 - Dec 2012, Ulm, Germany

The Wilken Software Group, headquartered in Ulm, has been developing its own standard ERP software for mapping core business processes since 1977 - be it in finance and accounting, materials management or corporate management.

Responsibilities:
  • Installing, setting up, and maintaining Linux SLES (SuSE Linux Enterprise Server)
  • Providing first and second-level support for the Wilken ERP Software
  • Offering first and second-level support for Oracle 9, 10, and 11 databases
  • Installing, setting up, and maintaining Inubit
  • Installing, setting up, and maintaining Wilken Ener:gy
  • Installing, setting up, and maintaining Wilken KIC (Customer Information Cockpit)
  • Conducting LAN, WiFi, and web security penetration tests
  • Providing first-level system service
CEO
MACCARIELLO IT Consulting - Maccariello Pasquale

Oct 2009 - Feb 2011, Naples, Italy

Responsibilities:
  • Managed projects and budgets
  • Set up and supported large virtualization environments
  • Installed, configured, and maintained complex VPN and firewall infrastructure
  • Conducted LAN, WiFi, and web security penetration tests
  • Installed rack cabinets and LAN and fiber optic cabling
  • Planned, installed, configured, and maintained high-availability networks
  • Used VoIP PBX (VoiSmart) systems
  • Used BES (Blackberry Enterprise Server) for remote management of Blackberry communication devices
  • Partnered with Diesse Solutions S.U.R.L to deploy BES in southern Italy and develop Blackberry apps
  • Conducted network and security assessments for banks
  • Served as a system/networking administrator for banks
4
5
Heswick Limited London Branch Of Chiasso

Nov 2008 - Apr 2009, Chiasso, Switzerland

Senior Unix/Linux Systemadministrator

Nov 2008 - Apr 2009

  • Installed, configured, and maintained Asterisk PBX, open-source billing software (A2Billing), VoIP prepaid systems, and Asterisk clusters.
  • Installed, configured, and maintained Linux servers (Slackware, CentOS), Windows (2003 Standard Small Business Server), Unix (Sun Solaris 5.10), and FortiGate firewalls.
  • Used various products to monitor systems and networks, including Zabbix, OSSEC, OSSIM, and SNMP.
Teles IP-TDM Specialist

Nov 2008 - Apr 2009

  • Install, configure, and maintain VoIP-TDM TELES hardware.
  • Set up VoIP-TDM routing on TELES systems.
Senior System and Network Administrator
Switchward & Trostmann AG

Nov 2007 - Oct 2008, Chiasso, Switzerland

Switchward & Trostmann AG was founded in 1998. The Company’s line of business includes providing communication services.

Responsibilities:
  • Managed BGP and public IP addresses on Foundry RX8.
  • Maintained HP, IBM, and SUN servers.
  • Installed, configured, and maintained SUN Storage and NetApp NAS clusters.
  • Worked with VMware ESX 3.5, Vocaltec (VoIP) clusters, Linux servers (Slackware, CentOS), Windows servers (2003 Small Business Server), and Unix (Sun Solaris 5.10).
  • Installed, configured, and maintained various firewalls, including m0n0wall, IpCop, PfSense (CARP Cluster), Cisco ASA, Foundry, Netscreen, and IpTables.
  • Monitored systems and networks using different software tools like Zabbix, Ossec, SNMP, sFlow, and ManageEngine products.
  • Maintained Oracle 9 and MySQL databases, focusing on number portability.
  • Conducted LAN, WiFi, and web security penetration tests.
6
7
Senior Unix/Linux Systems Administrator
Wind s.p.a.

Nov 2007 - Oct 2008, Milan, Italy

Wind Telecomunicazioni S.p.A. (also known as Wind Italy) was an Italian telecom operator which offers integrated mobile, fixed telephony and Internet services (under Wind brand for mobile and business services and under Infostrada brand for home).

Responsibilities:
  • Installation and configuration of Red Hat Linux
  • Troubleshooting and resolution of Linux OS system issues
  • Installation and configuration of VMware ESX
  • Management of Virtual Machines
  • Skills in support and maintenance of IT systems
H3G (Hutchinson Whampoa Limited)/ENSI (Ericsson)

Feb 2007 - Jul 2007, Milan, Italy

3 or Three is a global brand name under which several UMTS-based mobile phone networks and broadband internet providers operate in Hong Kong, Macau, Austria, Denmark, Indonesia, Ireland, Italy (Wind Tre), Sweden and the United Kingdom.

Senior Unix/Linux Systems Administrator - Deployment group

Feb 2007 - Jul 2007

  • Responsible for the installation and configuration of Apache, Tomcat, Selector, SDF, and Tibco Application.
  • Implementation of scripts for automatic backups for the entire Development and Testing area.
Senior Unix/Linux Systems Administrator - Operation group

Feb 2007 - Jul 2007

  • Focused on troubleshooting operational applications.
Senior Unix/Linux Systems Administrator - DMS group

Feb 2007 - Jul 2007

  • Managed mobile streaming platforms (Vidiator).
8
9
Junior Unix/Linux Systems Administrator
H3G (Hutchinson Whampoa Limited)

Nov 2005 - Feb 2007, Milan, Italy

3 or Three is a global brand name under which several UMTS-based mobile phone networks and broadband internet providers operate in Hong Kong, Macau, Austria, Denmark, Indonesia, Ireland, Italy (Wind Tre), Sweden and the United Kingdom.

Responsibilities:
  • Create user UID and GID allocations
  • Change access rights for files and directories
  • Switch from package to HP clusters
  • Freeze and unfreeze Veritas Cluster packages using Veritas Cluster Manager
  • Perform Ufsdump from file systems
  • Monitor servers with HP OpenView
  • Monitor backups and scheduled jobs using Control-M
  • Reboot HP-UX and Sun Solaris operating systems
  • Run scripts to back up data on HP Superdome
  • Remove zombie processes
  • Install Sun Solaris 5.x
  • Install and administer Red Hat Linux AS/ES
Junior Unix/Linux Systems Administrator
Italia DOC

Apr 2005 - Aug 2008, Ulm, Germany

Commercial agency of Italian food

Responsibilities:
  • Cybersecurity Consultant
  • System Administrator on Windows 2000 Server
  • Network Administrator
10
11
Junior Unix/Linux Systems Administrator
Esercito Italiano - Forze Armate, distaccamento Sala Convegno Sottufficiali

Nov 2003 - Nov 2004, Rome, Italy

The Italian Army (Esercito Italiano) is the land-based component of the Italian Armed Forces of the Italian Republic.

Responsibilities:
  • Accountant
Network/Systems Administrator
Zumbolo S.A.S.

May 2000 - Nov 2003, Castel Volturno, Italy

Responsibilities:
  • Supported Linux and Windows server systems
  • Conducted LAN and WiFi penetration tests
12
13
Network/Systems Administrator
TIM s.p.a

Jul 1999 - Nov 2000, Castel Volturno, Italy

Responsibilities:
  • Supported Sun Solaris 5.7 Unix OS
  • Supported Linux Slackware systems