Martin Gehrke

Pittsburgh, PA

martin@teamgehrke.com

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Education:

Bachelor of Science in Computer Science                                                               May 2006

Fu Foundation School for Engineering and Applied Science

Columbia University

                           

Computer Knowledge:

        Programming Languages (Used Daily):      PHP, Perl, Python, Bash, Javascript

        Programming Languages (Have Used):      C, C++, Java

        Operating Systems:                                      Linux (SUSE, Ubuntu), VMWare ESXi, IOS

                                                                             Windows XP/Vista/2k3/2k8

        Hardware:                                                    Dell & GenericWorkstations;

                                                                              HP DL360/380/580, HP BL460/680,

                                                                              Supermicro & Whitebox, Cisco 3750G/E, 4900

                                                                              Nvidia Tesla

        Open Source Software:                                 Apache, jQuery, Cacti, MySQL, VirtualBox

 

Work Experience:

Systems Administrator                                                                                    August 2006 – Present

Two Sigma Investments, LLC, New York, NY

Two Sigma Investments, LLC is a finance and technology firm that uses process-driven investment trading strategies. They leverage the use of  new technologies and a large machine environment to develop and compete in the financial industry.

• Product Manager for Simulation/Compute Farm
• Daily maintenance and long term project management for a top 500 Supercomputer level environment with 300+ servers, 1+ petabyte of storage at multiple data centers
  
• Responsible for server evaluation, purchasing, installation, monitoring, troubleshooting, repair
  
• Designed and upgraded the network from 1GbE using Cisco 3750s to 10GbE using Arista
• Managed the addition of 128 new servers to address capacity shortages
  
• Created metrics and Key Performance Indicators to help with a cost benefit analysis of future projects
  
• Collaborated with internal developers to research, evaluate, and purchase company's first GPU computation platform to dramatically decrease simulation runtimes
• Linux Systems Administration
• Automated unattended machine builds in Ubuntu using preseed files, apt-mirrors, and post-build customizing scripts to create a single touch machine build process for a Global build infrastructure allowing Administrators to quickly build servers in colocations around the world.
  
• Automated Server hardware and health monitoring to identify failed components and streamline RMA process
  
• Worked with users to identify hardware requirements, secured competitive pricing from vendors and engineered solutions to meet user needs
  
• Designed user interfaces using jQuery, Python, and PHP to visualize server monitoring data
• Authored a tool to centralize maintenance plans and communicate server down time to users using Python and MSSQL
• Created DEB repository for internal packages, automated new package additions, created DEB files from scratch
• Extensive Documentation of all aspects of environment and procedure, enabling all Administrators to more easily familiarize themselves with new features and information
• Troubleshooting of Research and Production equipment
  
• Datacenter Management
• Monitoring of environment and facilities using POE temperature/humidity sensors, cameras, and door sensors
  
• Ordered and installed 30 APC 48U Netshelter SX racks with cable management and rack-level managed PDUs at multiple locations
  
• Implemented hot aisle / cold aisle layout using datacenter best practices
  
• Setup realtime monitoring of datacenter and rack-level PDUs using SNMP
• Windows Systems Administration
• Built and configured Windows 2003/2008/MSSQL servers
• Intermediate knowledge of Active Directory / DNS / DHCP / DFS
• Rollout of 802.1x IBNS to user environment
• New user creation and maintenance
• Created a server in Python to listen for remote commands to create and delete DHCP and DNS records allowing for the automation of server provisioning and decommissioning
• Created Firefox extension to better integrate the browser into our Enterprise environment
  
• Network Administration
• Intermediate Cisco management, troubleshooting
• Assigned VLANs, created port-channels, and added switches to an existing Stack
  
• Systems Programming
• Python, Bash, PHP, CGI programming
  
• Tools to monitor and manage fast growing and quickly changing environment
• Regular Duties
• On-call rotation
• Helpdesk / phone support

 

Junior Systems Engineer/Administrator                                                        June 2004 – August 2005

Northrop Grumman Information Technology, Washington D.C.

• Team member of Group Virtual Reality Center and Software Integration Lab
• Responsible for 150 Windows, 15 SUN Solaris, and 5 Linux machines
• Order and assembly of new workstations

Personal Interests:
Home Network: At home I use a mix of Windows XP, Ubuntu, and FreeBSD. I run FreeNAS as a backup and file server that uses a mixture of TFTP, SMB, NFS, and HTTP. I have flashed the firmware of an older WRT54G with DD-WRT and created a secure wireless network using WPA2 encryption. I created a PXE network to build Ubuntu machines.
Firefox: I wrote an extension, Open Source in Tab, that allows the user to view the HTML source in an new tab, instead of opening an entirely new window.

 

Activities and Leadership:

United States Rowing Assistant Referee 2008-Present

Central Park Track Club Webmaster 2007-Present

Columbia University Varsity Crew Team – Captain 2004-05

Association of Computing Machinery – Organizational Committee Member 2004-05

International Athlete House - Founding member: Spring 2004

Columbia University Varsity Crew Team - Team member: 2003, 2004

Senior Patrol Leader  &  Assistant Scout Master – Alexandria, VA Boy Scout Troop 131

Masters Intermediate Crew Coach – Thompson Boat Club, Washington, D.C. 2004

 

Honors:

Eagle Scout, Troop 131, Boy Scouts of America

Washington Post All-Metropolitan Crew Team 2002

Presidential Scholar, Gonzaga College High School