System Administrator Quality Assurance

Paul J. Pathiakis

Uxbridge, MA 774-***-**** *********@*****.***

Sr System Administrator/Architect

Progressive and forward-thinking engineer with 10+ years of experience overseeing the development and installation of new networking and computing infrastructures. Selects the best possible solutions using knowledge of a wide range of available technologies. Collaborates with others to determine design specifications or details. Tests computer system operations to ensure proper functioning.

Core Competencies: System Engineering Technical Acumen Peer Collaboration Documentation Expert Stakeholder Communications Time Management Task Prioritization Attention to Detail Quality Assurance Strategic Planning & Direction

Certifications & Technical Skills

System Engineering, Systems Administration, Systems Programming, System Architecture, Network Communications.

Protocols: TCP/IP, UDP/IP, LDAP, SNMP, NFS, NAS, iSCSI, Ethernet, FDDI, CDDI, SCSI, SMB(SaMBa)

Internet Apps: Postfix, IMAP4/POP3, DNS (BIND 9.x - ), Mailman, SpamAssassin, F-Prot, DCC, MailScanner, Apache, Nginx

Security: PAM, SASL, Packet Filtering, Fail2Ban, various firewalls, Nessus

Oss: Solaris 2.3-10.0, FreeBSD 2.x-12.x, RHEL 3.x-8.x, AlmaLinux, Debian 4.x-5.0, SuSe 9-10 (SLES)

Filesystems: ZFS, UFS2, ext2, ext3, ext4, HFS, FFS, WAFL

High Availability: Various clustering software packages as well a fully versed in high-availability theory and practice as well as failover and redundancy. GlusterFS, Qualix and CARP.

Monitoring: OpenNMS (snmp based), Nagios, Ganglia

Backups: Creator of EMC's EDM, EDR, Bacula, (z)Amanda, dump/restore, remote storage, nearline storage, backup theory to allow rotating schedules and a minimum of time required for restoration.

Automation: Ansible, Kickstart, Jumpstart, DHCP, dhclient, DynDNS, ddclient.

Replication: rsync, unison, glusterFS.

System Logging: central logging services, syslog, rsyslog

Virtualization: VMWare, VirtualBox, Bhyve

Performance Tuning: filesystems, system parameters, application specific tuning, platform evaluation, throughput testing and platform QA.

Other: AWS, Git, Subversion, System/Network Security, LDAP/PAM/NSS to AD integration, SaaS, NFS, NIS, automounter, Veritas Suite. PostGreSQL, MySql, and numerous other tech.

Professional Experience

DDN Storage

L2 Technical Support 9/22-9/23

Performed the duties of break/fix on the Tintri Produce known as VMStore.

Liaisoned with customers

Trained L1 Technical Support

Stock Trader Trading Stocks during Covid

COVID-19 Time 1/20-9/22

Traded stocks during COVID lockdown

Sustained income at a surviving level

Returned to field asap after COVID seemed to get under control

Consultant to Boston Engineering King & Bishop

Principal Infrastructure Engineer 3/19-10/19

Researched internal infrastructure to make recommendations.

Hardware purchase (Dell PE 7425 2x AMD 7551)

Research and install NAS software with VM software. (FreeNAS)

Research and understand FIPS/NIST requirements for security implementation of Non-Classisfied Information (NCI) controls

Verify CentOS 7 FIPS/NIST implementations

Created FIPS CentOS 7 VM template.

Implemented Dual Factor Authentication comprised of WikiD one time passcode (OTP) service, FreeRADIUS, and OpenLDAP in VM/Lab environment.

Nagios configuration and plugins.

Principal Linux Engineer Navihealth Waltham, MA 12/18-2/19

Recommended changes to improve computer or information systems.

Fixed Postfix mail relays and SSL encryption issue in first week.

CentOS 5,6,7 – Began the rework and redesign of the platform to migrate all to a stable OS template on Centos 7ver1810.

RedHat Satellite (Spacewalk) initial configuration.

Created new kickstart profile by hand and then incorporated into Spacewalk for automated bare-metal builds.

Worked the daily ticket queue for critical Linux issues.

Documented all of the procedures above and more

Sr. Systems Engineer/Consultant Artech/IBM Andover, MA 5/18-7/18

Networker backups – Performed daily offsite rotation and weekly verification of backup media.

Solaris Administration – Supported Solaris 9 and 10 legacy systems.

Red Hat Administration – Configuration, performance tuning, troubleshooting of RH 5 and 6

Technical troubleshooting of middleware on RH 5/6 – Resolved 3 day old problem in 15 minute concall.

Network troubleshooting of middleware on RH 5/6. Verified bandwidth utilization and configuration of VLANs.

RedHat 7 migration project – evaluated and gave sequential timeframe checklist of prerequisites to migrate to RH 7 from RH 5 and 6.

Sr System Engineer/Consultant MorphoTrust/Idemia Bedford, MA 9/17-10/17

CentOS 7 – Rebuild and document environment to standards

Shell scripting and automating installation

Revamp GlusterFS implementation – GlusterFS was not replicating and never had. Initial configuration was incorrect. Researched and correctly configured and the system immediately started replicating and was highly available.

Start Ansible implementation – start evaluating the need for proper configuration management and other automation of tasks to reduce human error.

Created LAN infrastructure documents

Solutions Architect Atlantis Services (Owner) Uxbridge, MA 6/02-9/20

Contracted to:

Harvard University 9/15-11/15

Large Scale Port389 LDAP implementation

Detail scripting in BASH. Automation.

Financial (Company Confidential) Remote Access 8/10 - 10/10

Single Sign-on Project

Software Development (Company Confidential) Waltham, MA 5/10 - 8/10

Monitoring Systems Architect

Medical Components Client Natick, MA 12/09 - 3/10

System Admin Team Lead (temporary)

Dell Secureworks Providence, RI 08/11 – 07/12

Systems Engineer

Education

Bachelor of Science, Computer Science University of MA - Lowell Lowell, MA

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