M:+31 (0) 6 2302 7714 E: info@linuxadviesburo.nl Currently in assignment until may 2016. Contact only via above mentioned email or phone number. !!!! No reply will be given to linked in originating email addresses !!!! Interested in working for organizations or organizational units with a primary focus on Linux (Red Hat) and other Open Source Infrastructure solutions. Specially interested in datacenter automation. Freelance assignments only (32/36 h/w). Prefer projects(engineering role) rather than sysadmin jobs. Prefer to work in or near Amsterdam. I am LPI2 and Red Hat certified (Certified Engineer, Certified Architect: RHEL5/6). Contact me at +31 (0) 6 2302 7714, or send me an email: info@linuxadviesburo.nl Specialties and areas of interest: Linux (Redhat) consultancy Identity Managment in Linux and Mixed Environments Redhat Directory Server/OpenLDAP Redhat IdM Server/IPA OpenStack Docker OpenVPN Zarafa Groupware Unix (shell) ,Perl. VOIP Asterisk,FreePBX,FreeSWITCH Monitoring with Icinga, Nconf, Nagios, PNP4Nagios, NagiosGrapher, NRPE, NSClient++, Cacti. Automating (unix/linux) administrative tasks (Puppet). Maintenance of existing scripts. Problem analysis and troubleshooting.

Linux DevOps Engineer @ From May 2015 to Present (8 months) Red Hat Linux Specialist @ Linux consultancy From June 2007 to Present (8 years 7 months) Member at ITGilde @ From October 2014 to Present (1 year 3 months) Amsterdam Area, NetherlandsRed Hat Linux Specialist @ Designing, building and maintaining Redhat Linux based infrastructure solutions with an emphasis on Identity Management using Red Hat Identity Manager (IPA) on RHEL7, and integration with Satellite 5/Cobbler for automated deployment and configution. From July 2013 to February 2015 (1 year 8 months) Utrecht Area, NetherlandsRedhat Linux Specialist @ From January 2009 to February 2015 (6 years 2 months) Migrating trixbox 2.6 to FreePBX 2.11 with Asterisk 11.5 @ Porting some custom procedures. ISDN, VOIP and GSM trunks using SIP gateways. From September 2013 to October 2013 (2 months) Redhat Linux Specialist @ Migration of externally hosted websites to an internally hosted RHEL 6 system. Tuning SELinux, chrooted internal sftponly access, upload procedures, backup. Setting up separate staging server. aug-oct 2013: Implemented intranet (apache mod_kerb) SSO on RHEL 6 in a Windows environment (AD). From October 2012 to October 2013 (1 year 1 month) Rotterdam Area, NetherlandsSingle Sign On for HTTP intranet Linux/Windows @ Working on a SSO solution from Citrix Win7 clients to an intranet server based on Redhat Linux 6.4. From August 2013 to September 2013 (2 months) Rotterdam Area, NetherlandsExtending the Nagios monitoring for VX Company Managed Services solution @ Active and Passive monitoring. NSCA, NRPE, Check_by_ssh, adapting plugins. Instruction to team of operators/administrators. Writing documentation. From May 2013 to July 2013 (3 months) Linux Specialist @ Redhat Linux, Korn-shell, Perl, Subversion, building rpm's, Icinga monitoring, on the job training. From December 2012 to June 2013 (7 months) Designing/Implementing OpenVPN infrastructure for datacollection @ From October 2012 to May 2013 (8 months) Implementing Icinga/Nconf @ From June 2012 to December 2012 (7 months) OpenVPN reference implementation @ Limited number of clients. Using Certificate based authentication combined with TLS authentication and user/password authentication (using OpenLDAP) for mobile users. From June 2012 to June 2012 (1 month) avv Zeeburgia (Amsterdam Soccer Club) @ Design, implementation, maintenance of Website and supporting/training local staff http://www.zeeburgia.nl From January 2004 to June 2012 (8 years 6 months) Zarafa multi-tenancy reference implementation with OpenLDAP integration @ Zarafa 7 multi-tenancy reference implementation using OpenLDAP, phpLDAPadmin, postfix, postgrey, smtp auth, smtp tls, amavis,clamv, spamassassin on a CentOS 6.2 platform. From May 2012 to May 2012 (1 month) Asterisk/VOIP specialist @ Documenting the existing Asterisk implementation (5 servers), provisioning SIP phones, troubleshooting and solving problems, technical presentations and training local staff. Writing AGI and AMI (PHP) scripts and web based management tooling (PHP) and adding database (MySQL) schema's. Rewriting parts of the dialplan logic, especially for voiceprompt recording, queue handling and paging, as well as fixing external SIP trunk problems. From October 2011 to April 2012 (7 months) Linux Specialist @ Extending the existing Nagios configuration. Advise on a solution for centralized user (access) management integrating Linux servers in the authentication with Windows AD, while storing account information in a Redhat Directory Server. From July 2011 to July 2011 (1 month) Unix Specialist @ Migration of mainly Solaris servers to BoKS 6.5.x. From September 2010 to June 2011 (10 months) Implementing Nagios/NagiosGrapher @ Redhat,Centos,Nagios,NagiosGrapher,RRDtool,scripting,snmp,Dell Open Manage Nagios plugin,NRPE,NSClient++,nagstamon From July 2010 to August 2010 (2 months) Technical Application Manager @ Linux(CentOS 5.x), Weblogic, Oracle, Nagios, NagiosGrapher, rrdtools, NRPE, NSClient++ (Windows 2003), scripting plugins. From April 2010 to June 2010 (3 months) Unix Specialist @ Working on BoKS 6.5 infrastructure implementation. Creating scripts to handle day to day maintenance using the BoKS CLI commands. Also created scripts for monitoring both at the operational as well as functional (configuration) level. Adding automatic handling of events by writing a Perl script that interfaces with the Alarm Log functionality of BoKS. This was mainly designed to handle configuration of extended user attributes for "Non Personal Accounts" on mostly AIX systems, since BoKS is lacking this functionality at this time. From November 2008 to February 2010 (1 year 4 months) Senior Technical Specialist @ Worked on a (in house developed) Security Monitoring application at a large financial institution in Amsterdam, the Netherlands. Involves Sybase, Perl, Shell, PHP scripting, setting up filtering and alerting. Building web based frontend. Prior assignments involved implementing HP OV based network management solution. From October 1998 to December 2008 (10 years 3 months) Developer Security Monitoring @ From January 2003 to July 2008 (5 years 7 months) HP Openview Support Specialist @ From 1999 to 1999 (less than a year) Technical Support Engineer @ Specialised in 3Com Network Management (HP OV NNM and Netview6000) application support. From September 1995 to September 1998 (3 years 1 month) Network Support Engineer @ Support on products of UB Networks. SNMP Network Management. Support on Token ring and ethernet networks in general From March 1989 to August 1995 (6 years 6 months) Network Support Engineer @ From 1989 to 1995 (6 years) Telefonie monteur @ From 1987 to 1988 (1 year)

Hans Feringa is skilled in: Red Hat Linux, RedHat, Apache, Shell Scripting, Linux, Open Source, Unix Shell Scripting, RHEL, Nagios, Openstack, Perl, Virtualization, Unix, Servers, Network Security