Most of work related to:- building new projects with clients,- virtualization and containerization platforms,- private cloud design and implementation,- data center and DevOps environments design and implementation,- network, data center and IT environment automation,- Software-Defined Storage (SDS) solutions,- Software-Defined Network (SDN) solutions,- security and tuning of GNU/Linux systems,- service cluster management, load balancing and high availability,- automated system deployment and central management,- database clusters (MariaDB and PostgreSQL),- file, block and object storage,- SMB, NFS, iSCSI, FC and FCoE protocols,- S3, Swift, RADOS and iSCSI Gateways, RBD, CephFS, GlusterFS and GFS2,- PKI (Public Key Infrastructure) security and management,- Kerberos, LDAP, SSO (Single Sign On), OpenID Connect, SAML2 and OAuth2.0 protocols,- file, DNS, E-Mail and Web services,- hyperconverged platforms,- industrial infrastructure and technologies.Sales, administration, implementation and integration of solutions:- Red Hat Enterprise Linux,- Red Hat Identity Management,- Red Hat Certificate System,- Red Hat Directory Server,- Red Hat Gluster Storage,- Red Hat Ceph Storage,- Red Hat Ansible Automation,- Red Hat CloudForms,- Red Hat Virtualization,- Red Hat OpenShift Platform,- Red Hat OpenStack Platform,- Red Hat Satellite,- Red Hat Insights,- LINBIT SDS, HA and DR,- VMware vSAN, SRM and HCI,- VMware vSphere,- Cisco HyperFlex,- Cisco UCS C, B and S servers,- Cisco UCS Manager,- Cisco Nexus and MDS switches,- Cisco ACI (Application Centric Infrastructure),- Cisco NSO, Cisco DNA and Cisco SD-WAN,- Cisco Catalyst 9k and 8k,- NextCloud Enterprise,- Collabora Online,- ONLYOFFICE Enterprise,- Storware vProtect,- Zabbix and Grafana,- Ansible, Podman, Docker and Kubernetes.

Most of work related to:- building new projects with clients,- IP and video telephony (VoIP), SIP, H.323 and MGCP protocols,- analog, ISDN and GSM gateways,- OSPF, EIGRP, BGP routing for IPv4 and IPv6,- GRE, DMVPN, IPsec, SSL and MPLS VPNs,- multicast routing with PIM, IGMP/MLD in IPv4/IPv6 and MDT in MPLS networks,- FHS/L2 security for IPv4 and IPv6,- IEEE 802.1X and RADIUS/TACACS+,- wireless networks based on IEEE 802.11 with location services,- e-mail and web security,- data center switching, including FC/FCoE/Zoning,- HSRP, GLBP and VRRP protocols,- REP, STP, RSTP and MSTP,- QoS, DHCP, SNMP, NetFlow.Conducting classes in the area of CCNA R&S, CCNP R&S and CCNA Voice.Sales, administration, implementation and integration of solutions:- VMware vSphere,- Cisco UCS C and Cisco UCS B servers,- Cisco Fabric Interconnect,- Cisco UCS Manager,- Cisco Nexus Switches,- Cisco Unified Communications Manager Express (CME),- Cisco Unified Communications Manager (CUCM),- Cisco Unity Connection (CUC),- Cisco Unified Presence (IM & Presence Service),- Cisco Expressway (C and E),- Cisco TelePresence Server,- Cisco TelePresence Conductor,- Cisco TelePresence Content Server (TCM),- Cisco TelePresence Management Suite (TMS),- Cisco Webex and Cisco Spark,- Cisco DX, MX terminals and other Cisco IP Phones,- 2N Stargate,- Cisco Catalyst switches,- Cisco ME switches,- Cisco ISR and ASR routers,- Cisco Air APs,- Cisco WLC (Wireless LAN Controller),- Cisco Mobility Express,- Cisco Prime,- Cisco CMX (Connected Mobile Experiences),- Extreme Networks Purview Analytics,- Extreme Networks NAC Gateway with Captive Portal,- Extreme Networks NetSight- Extreme Networks Summit X430, X460 and X480 switches,- Extreme Networks Wireless Controllers and APs,- Cisco ASA-X,- Cisco FTD (Firepower Threat Defense),- Cisco FirePOWER with NG-IPS, AMP and URL Filtering,- Cisco FireSight,- Cisco ISE and IEEE 802.1X,- Cisco ESA,- Cisco WSA,- EMC VNXe/VNX.

Most of work related to:- building new projects with clients,- GNU/Linux Debian administration,- MySQL and PostgreSQL database administration,- webservers (Apache, php-fpm, ModSecurity),- mail servers (Postfix/Dovecot, Roundcube and SpamAssassin),- file servers (Samba, FTP),- Nagios, SNMP, Squid, FreeRADIUS,- DNS and DHCP clusters with HA,- LINBIT DRBD, Heartbeat, LVM,- GNU/Linux system security and kernel security (grsecurity),- Proxmox and VMware virtualization,- RADIUS and EDUROAM integrations,- WiFi networks for events.Conducting classes in the area of CCNA R&S and CCNP R&S.Sales, administration, implementation and integration of solutions:- Cisco Catalyst switches,- Cisco ISR routers,- Cisco Unified Communications Manager Express (CME),- Cisco IP Phones,- Cisco Air APs,- Cisco WLC (Wireless LAN Controller),- GNU/Linux Debian,- VMware vSphere,- Microsoft Windows Server.

Most of work related to:- building new projects with clients,- GNU/Linux Debian administration and configuration:- storage and NAS solutions,- enterprise networks,- IP telephony and ISDN/PSTN gateways,- database, mailing lists, DNS, E-Mail, file and Web servers,- migrations from OpenBSD and FreeBSD to GNU/Linux Debian.Conducting classes in the area of CCNA R&S and CCNP R&S.Sales, administration, implementation and integration of solutions:- Extreme Networks,- Cisco Systems,- NetApp,- EMC,- VMware.

Poprowadzenie jednorazowe kilku przedmiotów dla studiów zaocznych II stopnia.Kierunek INFORMATYKA, specjalizacja Teleinformatyka, przedmioty:- Bezpieczeństwo transmisji danych,- Bezpieczeństwo aplikacyjne i systemowe.Kierunek INFORMATYKA, specjalizacja Cyberbezpieczeństwo, przedmioty:- Bezpieczeństwo przemysłowych systemów transmisji danych.

Poprowadzenie 4 semestrów szkolenia przygotowującego do egzaminu CCNA (Cisco Certified Network Associate) dla 2 grup studentów.

GNU/Linux server administration.Integration of Open Source solutions.Implementing cabling and network installations.In the period 11.2006-06.2008 - an ISP for 8 housing estates in Krakow.In the period 2000-2008 - the conduct of amateur internet network across a one housing estate in Krakow.

Providing trainings related to:- GNU/Linux and Open Source products,- CCNA (Cisco Certified Network Associate) versions 3.1, 4.0,- CCNP (Cisco Certified Network Professional) version 5.0.Preparation of training materials and presentations.Administration of the corporate network and servers.Integration of network solutions for customers:- Cisco Systems,- GNU/Linux and Open Source products.

Guild Telecom was an ISP for more than 6 housing estates in Krakow.GNU/Linux Slackware administration:- name servers [Bind],- system management and network monitoring [SNMP, MRTG, RDDtool],- traffic filtering, traffic shaping, bandwidth allocation, quality of service [iptables, iproute2],- network services [DHCP], - building and hardening the kernel for dedicated hardware and solutions,- BASH programming,- and a lot of other related stuff.Configuration and management of network devices:- switching [ D-Link, Planet],- wireless [Planet].In the period 02.2006-07.2006 - remote work from London.

TOMNET was an ISP for more than 10 housing estates in Krakow.GNU/Linux Slackware administration:- database administration [MySQL, PostgreSQL],- file servers [Samba],- mail servers [Qmail, Postfix],- name servers [Bind],- web servers [Apache/Apache2, suPHP, suhosin],- system management and network monitoring [SNMP, MRTG, RDDtool],- traffic filtering, traffic shaping, bandwidth allocation, quality of service [iptables, iproute2],- network services [PPP, DHCP, Squid], - BGP peering [Quagga],- system and kernel security [grsecurity],- building and hardening the kernel for dedicated hardware,- BASH, SED and AWK programming,- and a lot of other related stuff.Configuration and management of network devices:- switching [3Com, Nortel Networks, Planet],- DSL and PPP modems [Goramo, Efficient Networks, Lucent Technologies],- wireless [Planet].Implementing cabling and network installations:- installation for wire and wireless networks.In the period 02.2006-07.2006 remote work from London.

Many different construction works:- floor fitting- furniture assembly,- painting,- cleaning,- assistance in other construction works.

GNU/Linux Slackware administration:- name servers [Bind] - traffic filtering [iptables, iproute2],- system security [grsecurity, Gradm, PortSentry, AIDE],- building and hardening the kernel for dedicated hardware and solutions.Windows 2003 Small Business Server administration:- MS Exchange 2003,- MS SQL Server 2000,- MS ISA Server 2000.

Comprehensive cleaning of MPK buses.

Comprehensive cleaning of MPK buses.