- High profile jobs as security advisor and system integrator for past 20 years: Croatian President's office, several governments, Croatian National Bank and various private banks, various ISPs and various Alexa top 300 sites- Active certificates: LPIC-1, LPIC-2, LPIC-3 300 (Mixed Environments), LPIC-3 304 (Virtualization & High Availability), SUSE Certified Linux Administrator (CLA)- Very advanced knowledge of the software development under Unix/Linux platform- Wrote ~60 articles on Unix/Linux for Mrez@/BUG magazine- Advanced programming experience in many programming languages (Python, Golang, Rust, C, Perl, C++, Java, etc.)- Has been working on several FLOSS projects (Hybserv 2, PAM S/Key, Hybrid 6, Hybrid 7, etc), has contributed to many others (slrn, mrtg, etc) and wrote a quite few mini OSS projects (betteralign, ednevnik-bot, iSMC, findlargedir, minifind, pktstat and pktstat-bpf, axfr2hosts, dnstrace etc.)- Very advanced knowledge and experience in design, installation, administration, security, tuning, teaching others and other topics on Unix platform and derivatives (FreeBSD, NetBSD, OpenBSD, DragonFly, Linux, SunOS, Solaris, OSF1, Tru64, Ultrix, AIX, Irix and others)- Years of experience in computer forensics and pentesting- Has held numerous (>40) various lectures and teaching sessions on Unix/Linux security, code development, various Unix service configuration and control, etc.Specialties:- Unix and Linux consulting and complete solutions- Storage: small, mid, large and many PB-sized SAN and NAS systems- Complete knowledge of configuration, optimisations and inner-workings of all networking and non-networking Linux and Unix services- Unix system and application programming in various languages (C, C++, Python, Perl, Java, Awk, Shell, Go, etc.)- Unix and Linux security and penetration testing- extensive in-depth Cloud expertise on large-scale projects: containers (LXC, OpenVZ, Docker etc.), hypervisors (KVM, Xen, HyperV), frameworks (OpenStack and CloudStack) and storage (EMC Isilon, Solidfire, Ceph)