Vocational Technical High School of Chemistry 

Experienced IT Networks and Systems Professional.

Skills: Resolving Issues · Problem Solving · Authentication Systems · Microsoft Intune · Hardware Configuration · Microsoft Server Technologies · System Configuration · Vendor Management · Microsoft 365 Security · Knowledge Acquisition · Security Controls · Vendor Relations · Intrusion Detection · Security Monitoring · Network Infrastructure Architecture · Information Technology · Network Assessments · Network Services · Technical Architecture · Security Appliances · Cisco Firewall Security · Cloud Administration · Change Management · IT Strategy · Supplier Management · Infrastructure Services · Systems Engineering · Threat & Vulnerability Management · OpenSSL · Multicast

ATSYS Pty Ltd

Senior IT Systems & Security Engineer

- Responsible for the design, installation and maintenance of wayside systems
- Improved security posture of the solution by the installation of NGFW, the introduction of the DMZ, and the implementation of vulnerability scanner
- Developed and implemented QNGR Project’s cyber security policies, ITSM and Business Continuity Plan
- Authored, Co-authored and reviewed multiple Technical Documents, Change & Modification Request
- Supporting the A&M Services team in train-to-wayside communication 
- Providing technical support for standard IT solutions (Cisco and Juniper equipment, Linux, Azure & AWS Cloud, VMware, Veeam, Microsoft Windows Server, Microsoft SQL, ELK stack) as well as industry-specific, proprietary solutions (dedicated train sub-systems, MITRAC TCMS and IPTrain)
- Working within a continuous improvement culture and mindset implemented multiple network and system automation mechanisms using Git, Ansible, Bash &  Python scripting
- Responsible for communication with customers (internal and external), suppliers and subcontractors
- Participate in multiple high-level meetings as an SME for cybersecurity and the wayside systems
- Designed server room for the new office with redundancy in mind (A/C, Power and FSS) and coordinated IT equipment move

Alstom

Senior Communications Engineer - IT Infrastructure & Cybersecurity

- Member of 14 strong Australia-wide IT Services team supporting customers across Queensland in other states
- Responsible for a full project’s life-cycle – from initial pre-sales engagements, through planning and implementation to handover to the support team
- Supporting technologies across all disciplines of IT and multiple vendors
- Providing 3rd level support to non-Managed Services customers
- Maintain ownership of incidents and escalations at client sites
- Day to day operations of client's systems and networking
- Lead and manage key IT projects with your client base
- Provide technical consultancy and solution architecture to customers' on how they can best leverage IT in their environment

Brennan IT

ITS Engineer

- Responsible for every aspect of my customers’ IT - from defining IT policies and developing IT solutions that improve productivity, to planning, installing and maintaining all aspects of the customer’s IT, including BAU activities
- SMB networks configuration and maintenance – Managed Switches (Cisco SMB series, Netgear ProSAFE, HP ProCurve, Dell PowerConnect), Firewalls (Cisco, Fortinet, Netgear), Wireless (Cisco, Juniper, EnGenius, Netgear), Wireless P2P and MESH configurations, Broadband routers (Cisco, BT/2Wire, Netgear)
- Covering multiple vertical markets: Consumer, Education, Engineering, Finance, Government, Retail, Transportation
- Cloud solutions – Microsoft Office 365, Microsoft Azure, Amazon AWS
- SMB Server solutions – Software (Microsoft Windows 2003/2008/2012/2016 and Microsoft Windows SBS 2003/2008/2011), Hardware support (HP ProLiant, Dell PowerEdge)
- Business Critical applications: Sage Line 50, Sage Payroll, Roadrunner, POS Applications, StarPayroll, Digita Suite and other
- Desktop Support – Microsoft Windows XP/Vista/7/8/8.1/10 and Mac OSX
- Virtualisation and NAS support: VMware ESXi and vSphere, Microsoft Hyper-V, Synology DSM, FreeNAS, NAS4Free
- Documenting new solutions, implementation steps and maintenance procedures
- Keeping systems documentation up to date

2MITC

Information Technology Consultant

- A member of Ireland's Technical Services which supports multiple local customers along with Irish divisions of UK and international companies 
- Participated in 24x7 on-call rota supporting a wide range of enterprise and ISP customers across the whole isle of Ireland
- Supporting multiple vendors, some of them well known like Cisco, Juniper, HP (Aruba Networks), Motorola, Riverbed and others with focused customers group (Marconi, Laurel or Redback)
- My role involved planning, installation and support of wired and wireless networks based on Cisco, Aruba and Juniper Networks equipment
- I have experience in supporting a range Linux distribution – RedHat, Debian, SuSe, Ubuntu and Slackware
- Working with a lot of innovative technologies - IP Telephony (Cisco/Shoretel), Virtualisation (VMware, Hyper-V), IPTV and Signage (Tripleplay), IP CCTV (FLIR)
- As a member of a UK-wide delivery team, I participated in multiple projects for customers scaling from SMB to large enterprises and fulfilled roles ranging from Level 1 Engineer to Technical Design Architect
- Performed pre and post-installation wireless site surveys using Ekahau and Airmagnet software
- Subject Matter Expert in Wireless Networking and Network Security

telent Technology Services Ltd

Technical Specialist

- My role involved the planning, installation, and support of secure Trapeze Wireless LANs. This also included support of surrounding technologies such as Ekahau, AirDefence, Vocera, and Divitas
- As a Network & Infrastructure Engineer and previously a Systems Engineer, I have helped expand the company's customer base, which incorporated three out of five Health Trusts in Northern Ireland, a number of government bodies and several private companies
- I was a member of the eight-strong Infrastructure Team who collaborated closely with the Sales consultants, through which I have gained insight into customer relations and reinforced my experience of team working
- Working either alone or alongside Trapeze's and OPNET's Pre-Sales Engineers, I have gained valuable experience designing and implementing enterprise-class solutions
- Through several VMware and HP BladeSystem deployments across government and health sector organizations, I've helped our customers introduce server virtualization to their infrastructure and take advantage of the benefits it brings
- As a Systems Engineer, I was responsible for multiple Microsoft Windows SBS 2003, Microsoft Windows Server 2003, Microsoft Exchange Server 2003, MailMarshal and WebMarshal deployments for small and medium-sized businesses across Northern Ireland. I have a good understanding of Active Directory, DNS, DHCP, IAS, IIS and ISA 2004
- I also produced finalized network documentation for customers

Business and Scientific Services Limited

Senior Network & Infrastructure Engineer

- Started as a Systems Administrator responsible for company’s servers running a mixture of Windows Server 2000/2003 and Linux operating systems
 - Configured and maintained multiple services including Active Directory, Microsoft Exchange 2000, IIS, SharePoint as well as Apache, Samba, OpenVPN, IPSec VPN
 - Provided support to office staff and remote workers
 - Promoted to Systems/Network Administrator in Jan 2001 with added extra responsibilities for the company’s customers network
 - Participated in four men 24/7 on-call rota to maintain uninterrupted functioning of the network for 1500+ home users
 - The client network composited of multiple LANs connected together using HDSL modems or P2P Wi-Fi links
 - The backbone consisted of 25+ Slackware Linux servers running RIP to do routing and iptables/HTB for traffic shaping

Marcin Markowski