David Crim

About David Crim

Senior Level System Architect and Engineer with extensive knowledge of available Open Source technologies and the ability to integrate them into working systemsSkilled in the automation of system deployment, management, and monitoring processes. Extensive work with HPC clusters using Slurm, LSF, and Hadoop. Experienced in storage options for clusters including NFS, GPFS/Spectrum Scale, iSCSI, Gluster, HDFS, and BeeGFS.Provide support for engineers and traders in an environment requiring innovative solutions and the ability to respond quickly to changing requirements. Configure and support use of SSH, GPG, SSL, and TLS for users and serversEvaluated and deployed a Spacewalk management and provisioning server to build and maintain 100+ CentOS systems.Evaluated and deployed a 70 node, 140 CPU compute cluster using LSF.Introduced new technologies into environment such as:Data center inventory management (Racktables)System monitoring (Centreon, Icinga, Nagios, Monit, Munin, Ganglia, ELKS)HPC systems (Slurm, Hadoop)Build management (Foreman/Katello, Spacewalk, Cobbler)Configuration management (Puppet, Ansible)Containers (Singularity, PodMan, Docker)Directory services (AD integration, LDAP, Kerberos)Installed and managed a Jabber IM server, a Cactus network monitoring server, a Nagios system monitoring server, phpMyAdmin and phpPgAdmin database managements systems, a video sharing server using PhpMotion, and a CFEngine configuration management server.Built custom RPM packages, including kernels.Deployed and support departmental web server using Apache, MySQL, and TWiki.Deployed custom private networks for experimental testing including VPNs and complex routing configurations.Past positions have included work as an RF IC designer and RF circuit designer.Specialties: Experienced in the use and deployment of Linux (RedHat, CentOS, Fedora, Ubuntu), Compute Clusters (Platform LSF and GridEngine), Virtualization (Xen, KVM and VMWare), Spacewalk and RH Satelite, Networking (Cisco, Juniper), Perl, Python.Also experienced in the use and deployment of Apache Web server, MySQL, PostgreSQL, Oracle, Linux Firewalls (IPTables), NIS, NFS, DNS, LDAP, Samba, Matlab, Drupal, PHP, C, C++, Java, JavaEE (JBoss, Glassfish), Hadoop, Cadence, Synopsis, and Agilent CAD tools.

Experience

1. System Engineer

   IMC Trading

   Jan 2020 — Present · Chicago, IL, US

Education

• University of Illinois Urbana-Champaign

  BSEE

  1981 — 1985

• University of Illinois Urbana-Champaign

  MSEE

  1985 — 1987

Skills

• Linux System Administration
• Platform Lsf
• Low Latency
• Fedora
• Fedora Linux
• Java
• Git
• High Availability Clustering
• 10g Ethernet
• Postgresql
• Rhn Satellite
• Nagios
• Perl
• Spacewalk
• Mysql
• Unix
• Ssh
• Cacti
• Linux Firewalls
• C++
• Dns
• Debian
• Digital Certificates
• Virtualization
• Rpm
• Centos
• C
• Ldap
• Cluster Management
• Ip Multicast
• Kerberos
• Linux Kernel
• Linux
• Cluster
• Cisco Technologies
• Red Hat Linux
• Solaris
• Cobbler
• Raspbian Linux
• Version Control Tools