Adam Kosmin
[email protected]
(347) 922-5XXX
GPG: 481AF0AE/8FCF 5C25 2B65 91E9 D1D8 71BD E874 6802 481A F0AE
Undisclosed, Senior DevOps Engineer: 05/2020 - Present
Sailthru, Senior Systems Engineer: 01/2015 - 12/2019
- Replace legacy Chef stack with Ansible+Jenkins.
- Automate full stack AWS deployments across multiple VPCs.
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Manage 1K+ servers running CentOS; both physical (colo) and cloud (AWS).
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Design and maintain ELK cluster; focus on storge and document retention.
- Implement site-wide encryption-at-rest using Tang+LUKS.
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Support a variety of infrastructure services such as HAProxy, Sensu,
DNS, Kickstart, and others.
Reliant, Senior Systems Engineer: 02/2009 - 06/2014
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Design and build all aspects of configuration management using Puppet;
focus on scalability. [2]
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Prototype a new "on demand" bootstrap using Docker by way of its API.
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Support legacy OpenSolaris footprint with a focus on migrating to Debian
GNU/Linux.
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Integrate 24/7 monitoring into configuration management infrastructure.
[3]
- Migrate from Nagios to Sensu for improved monitoring.
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Write various integration tools and scripts to reduce manual labor and
automate processes.
24/7 Real Media, Senior Systems Engineer: 11/2006 - 02/2009
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Automate 500+ servers using Puppet; a free software configuration
management solution.
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Provide 24/7 monitoring of application work flow using Cacti and Nagios.
- Move Operations team over to a proper version control system.
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Manage critical services such as LDAP, NFS, Yum, and DNS across multiple
data centers.
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Work with development team to automate and monitor all aspects of
internally developed applications.
Visual Trading Systems, Linux Systems Administrator: 10/2005 - 11/2006
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Design highly available messaging solution using Postfix, DBMail, Horde,
and Maia MailGuard.
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Support a broad range of production services including Samba, FTP, DNS,
DHCP, and CVS.
- Provide virtual hosts as needed via Xen virtualization.
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Replace inefficient documentation practices with ACL-aware web based
collaboration tools.
- Overhaul enterprise backup routines of mission critical data.
TransactTools, Systems Engineer: 10/2003 - 09/2005
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Maintain multiple GNU/Linux server farms offering mail, web hosting, and
replication services.
- Maintain all firewalls (Cisco, OpenBSD running pf and pfsync).
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Automate and monitor backups of critical server configurations and data.
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Document existing processes, build procedures, and more for disaster
recovery purposes.
New York Presbyterian Hospital, Senior Systems Engineer: 01/1997 - 05/2003
- Lead Information Security Officer for Back Office.
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Implement several GNU/Linux based services including Samba, CUPS, and
OpenNMS.
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Support mission critical Document Imaging system running on NT 4.0
platform.
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Develop several Server Side Javascript (SSJS) applications for use
within the Medical Records department. Applications included a helpdesk
system, a queue monitor, as well as a paging system.
Etc...
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Presented "Evolution of Scale" at PuppetConf 2012 [1] and
"Puppetizing a Segmented Distribution Network" at PuppetConf
2011 [2].
- Multiple publications in Linux Journal Magazine [3].
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Red Hat Certified Engineer (RHCE) & Linux Professional Institute
(LPIC 1 & 2) certifications.
[1]
http://www.youtube.com/watch?v=HRcAAUWpxuo
[2]
http://www.youtube.com/watch?v=v991Qppt78c
[3]
http://www.linuxjournal.com/user/801129