John Sellens is the founder and proprietor of SYONEX, and has extensive experience in system and network administration.

Make the most of not too much: John has extensive experience in making modest resources (time, money, etc.) go a long way, especially in using open source software and tools to provide effective (and cost effective) services and business solutions.

John's areas of expertise include:

• System and network monitoring and service management
• Operational readiness and ongoing operations
• The needs and services of service providers: mail, connectivity, web, etc.
• System and software integration: putting multiple components together in very effective ways
• Open source software and system integration
• Asterisk PBX and VoIP
• UNIX and variants: Solaris, FreeBSD, Linux, and others
• Windows and Windows integration
• Security, firewalls, access controls
• System and network appliances and their application

John's skills include:

• Scripting, programming, and "software glue" - perl, shell, awk, C, Tcl, PHP, SQL, etc.
• Teaching and writing: making the complicated comprehensible
• Solving business problems with the appropriate application of technology