SUMMARY:

Architecting computer technology solutions to support modern businesses. Extensive experience creating stable, scalable production infrastructure for companies from DotCom startups to Wall Street financial firms. Extensive experience solving technical problems using Free Open Source Software. Infrastructure and Application automation using current DevOps principals.

TECHNICAL SKILLS:

Virtualization: VMware / VRA, KVM

DevOps: Chef including Rspec and Chef Server, Foreman / Puppet / Satellite, Ansible, Jenkins, Packer, Terraform, Zookeeper

Cloud: AWS, Rackspace

Source Control: Gitlab / GitHub

OS: Expert Debian / RedHat Linux, some Windows

Languages: Chef, C, Bash, Python, Puppet, SQL.

Databases: Expert MySQL, Cassandra, MongoDB, Oracle. Some MSsql Server.

Networking: TCP/IP, firewalls, switches, load - balancers

Security: Linux host hardening, Confidential /AlienVault, FreeIPA

Monitoring: Zabbix / Grafana, Nagios / Ganglia, Splunk

EXPERIENCE:

Confidential, Wilton, CT

Contract Linux DevOps Engineer

Responsibilities:

• Worked on a team which successfully migrated 1K Linux hosts from CF Engine to Chef. Assisted in building out VRA on new Dell/VMware Confidential infrastructure.
• Provided chef support to external teams. Used Jira and agile/scrum.

Confidential, Wallingford, CT

Linux Engineer

Responsibilities:

• Worked with existing team to manage on-prem hardware including 5-node VMware cluster, NetApp San. Built Zabbix / Grafana monitoring system.
• Managed Rackspace production and dev environments.
• Mentored junior engineers.

Confidential, Trumbull, CT

Principal Linux Engineer / Manager

Responsibilities:

• Manage 3 member Linux team with global primary responsibility for Linux systems and secondary responsibility for hardware, VMWare, Windows systems.
• Using Puppet and Ansible to build OS infrastructure for Linux applications across 1800 Linux physical and virtual servers.
• Project management via SRM and in-house PM team.
• All RHEL and Centos 6/7 linux on HP hardware. Boot / Data via 3Par SANS.
• Supported dozens of Oracle RAC clusters, MySQL, Hadoop, Splunk.

Confidential, New York, NY

Contract Senior Linux DevOps Engineer

Responsibilities:

• Created infrastructure to support iOS/Android and linux apps and the backend which supports them from scratch Using AWS but relying on FOSS tools as opposed to AWS tools such that migration to another cloud provider is possible.
• Support Developers as they create code and unit tests for Jenkins to build and run. Customer has 30 million subscribers.
• Design all services to be highly available and horizontally scalable.

Confidential, New York, NY

Senior Linux Engineer

Responsibilities:

• Used puppet for preparing OS for application deployment in multiple environments.
• Deployed and tuned mysql clusters.
• Jira/Agile/Scrum for project tracking.
• Jira / Scrum for project mgmt.

Confidential, Madison, CT

Senior Linux Engineer

Responsibilities:

• Senior member of a team of 6 Linux / DevOps engineers.
• Managed 100 Rackspace and VMware virtual servers.
• Designed and built Jenkins system to compile and deploy Java-based apps.
• Architect for upgrades to production infrastructure Database re-architecture project. Design and implement security related improvements.
• MySQL DBA for 5T production system.
• Storage using SSD and EMC VMAX SAN. Extensive InnoDB engine tuning.
• Coached business to migrate legacy data out of production database.
• Installed Confidential / AlienVault to monitor Linux and windows servers
• Built new Rackspace servers and migrate production from office to RS Chicago.
• Mentored junior team members.

Confidential, NYC

Senior Linux Engineer

Responsibilities:

• Provided Linux admin support.
• Maintained hardware in 3 Data centers.
• Automated OS install with stand-alone Puppet system.

Confidential, Norwalk, CT

Manager Infrastructure Team

Responsibilities:

• Lead a team of 11 Linux and software engineers to manage 300% growth year over year.
• 25,000 Ubuntu Linux systems in the field 90 Petabytes of ZFS on 1300 Linux servers.
• Ubuntu 12.04 running ZFS-on-Linux 0.6.2 Multiple data centers.
• Re-engineer core infrastructure of entire operation. Standardized on Foreman/Puppet with eyes towards OpenStack.
• Operational responsibility for internal and external Linux security.
• Implemented firewall rules on all Linux hosts. POC with TrustWave WAF.
• Drove DevOps team to provide Dev with core tools.
• Confluence and Wiki documentation systems.
• Provided KVM-based development and QA environments.
• Assisted QA with adoption of Jenkins and Selenium.
• Drove adoption of OpenLDAP/Active Directory integration for central authentication across entire infrastructure.

Confidential, Norwalk, CT

Senior Linux Engineer

Responsibilities:

• Lead a team of seven Linux engineers. Tuned Linux for fastest speed and reliability. Managed migration of legacy Solaris and Linux servers to Linux RH6 KVM guests.
• Operational responsibility for Linux-based global financial trading system, internal Apache/Tomcat web servers, external website across five physical data centers.
• RCA analysis and recommendation of preventative measures. Tuned for maximum performance and stability.
• Primary responsibility for replicated (DRBD v8.3 over WAN in synchronous mode) MariaDB clusters, secondary responsibility for Oracle clusters using OCFS2 and ASM via Brocade switches to EMC.
• Responsible for 600 RedHat physical hosts, 400 KVM guests, 10 VMware servers, 3 EMC SANs, backups, server and network security.
• Upgraded production systems from RH3/4/5 to RH6. Managed firmware on servers, disks, NICs, HBAs, etc.
• Created and manage clustered software-based load-balancers for Linux infrastructure (snmp, ntp, dns)

Confidential, Greenwich, CT

Senior Technical Operations Engineer

Responsibilities:

• Operational responsibility for Linux-based global financial trading system across 8 data centers.
• Responsible for 1400 RedHat boxes, HP EVA-8000 SANs, Linux Confidential clusters, server and network security.
• Tune Linux for fastest app speed and lowest-latency using pinning, priority and RedHat's RTK.
• Server virtualization using KVM / Xen / VMware. Responsible for developing ever-faster hardware/Linux OS platforms for production use in 12 data centers worldwide.
• Manage developers / network admins / project managers to guide production issues to resolution.
• Create system monitoring and alerting systems using Nagios/Ganglia/GroundWorks/custom scripts.
• Responsible for online disk backups of Confidential clusters using rsync and diff-backup and custom scripts.
• Exercise disaster recovery plans for corporate data warehouse and production databases.

Confidential, New York City

Senior Professional Services Engineer

Responsibilities:

• Provided Linux support for customers implementing OpenQRM management software in the NYC financial industry.
• Provided infrastructure consulting to various financial customers like TradeWare who handled 20% of all Confidential execution orders.
• Created and deployed custom application modifications.
• Provided technical support during all sales calls east of the Mississippi. Company ran out of venture capital.