Jonathan Tester Email & Phone Number

Falls Church, Va, Us

Staff Software Engineer Advanced ProductsAgileEmbedded Linux (Wind River, Redhat)File Linux kernel File System Security patent.Virtual Oracle (ovs), ZFS, XEN, clusters, live update, virtual boxSelinux, Host Based Security System (HBSS) iptables. Label ipsec, cipso,Hardware bring up, C/C++, livecd. Develop Wind River Embedded Linux Secure file system (kernel). Multiple Independent Levels of Security (MILS), Separation Kernel. Ipxe, pxe, Pxeboot, tftpboot.Install and config, Graphite, collectd and ipmitool to collected status of board.Wind River,Vmware hypervisor (esx). Host are fedora and ubuntu. Involved kernel areas file systems, device drivers, modules, proc, syslog, ipv6, stacked/layered file system, kernel communications, cache memory, subversion. Add collectd and ipmitool hardware diagnostics.Port some drivers to Fedora 11,12, make rpm, spins, livecd. Kickstart, Tilera Board, stretch card.Gstreamer, plugins, c/c++, python. XML Hack iso, to produce new iso disk.

Los Angeles, Us

Embedded Linux kernel eReader (Marvell), Low Level kernel,Battery Device Driver, power management , physical user interface (kernel input), svn, GPIO, MFP, SOC, qemu,, led drivers,ARM/pxa/zylonite.Development was done on ubuntu, Sys admin.

San Diego, Ca, Us

linux

Embedded Linux gui, using glade, libwww, libghttp. ltib and gtk, XML. FedoraDevelopment was done in VMware, C/C++, Freescale Coldfire. Sys admin and development was done on ubuntu.

linux

Help get the project started, 802-11s Mobile wireless mesh networking

Drivers and kernel

Port a linux 2.4 pci/dma/SMP device driver to Fedora 2.6, create rpm's, create rpm's with mysql, ocr application.Integrate New Camera API (Point Gray, level 7). Use Perl and C++, ACE , dc1394, interface with Oracle and mysql , ups, CVS, anaconda for the system software, serial interfaces, and basically get the whole release together.

Embedded Linux System audio mixing system, port to Nokia n800 palm. Development was done on ubuntu.Design and architect the whole system HTNL, PHP, XML, LAMP, The n800 was configure as a HTML apache server.

linux team leader

Louisville, Co, Us

Fix linux fedora kernel device driver, bug, use kgdb.Dec 2006 - Feb 2007 Mushroom NetworksEmbedded Linux, Distributed wi-fi, Debian linux kernel, lockstat, kerneltop, readprofile, dstat and oprofile, iptables, 802.11 protocols. Arm, ucLinix, embedded, minicom, bringup, madwifi, build Tool Chain, cc, build romfs etc.

Louisville, Co, Us

linux

San Diego, Ca, Us

Linux networking, kernel, bringup, profiling

FreeBsd driver

design and write a 2.6 shim distributed nfs, file system used was SuSE 9.3,10.0, debug with UML (user mode linux - virtual linux os similar to Vmware, or xen). Set up virtual networks, on one machine. Peer to peer but on NFS and in the kernel. Do project completely from conception to completion. Aug 2006 ILTS -port small application from windows to linux (weekend work

linux kernel

linux driver

San Jose, California, Us

Unix, linux kernel

Develop Host Intrusion Detection System (HIDS), design and write intrusion shim device driver for Linux (kernel, device driver). Hook system calls and do Process Blocking, set up and supervise (design) AIX, Solaris and HPUX kernel projects, to port the Solaris driver, do reverse engineering on HPUX, AIX. Do lot of work on vnode and file systems. Port kernel driver to Linux (RedHat) and use kgdb for debugging Design the file, allowing least performance degradation with maximum security. Design and implement buffer overflow protection in the kernel. Architect the Solaris/AIX/HPUX/Linux HIDS system. Design automatic test of HIDS package. Linux SMP (kernel). Design File and Process Blocking. Mentor Junior engineers. Stack, heap and libc buffer overflow in userland. Use Perforce for source control. Some work done in Windows .NET, C++. C++ on Linux 2.6. Dynamic libraries in C++. Linux 2.4 and 2.6. 64 and 32 bit.Multiply releases from specification and patents to qa/product release.

Develop Host Intrusion shim Detection System (HIDS), to harden an OSSolaris kernel (mutex) set up debugging tools (gdb, ksld_kadb), Do Linux kernel port. Convert Solaris kernel security SMP device driver from 32 bit to 64 bit (2.7, 2.8, 2.9). This involved many modifications to the core kernel, system tables, ioctl etc. File/directory protection, buffer overflow, this was done in loadable module. This product would both prevent and record Hacker attacks (Intrusion protection).Use gdb to debug the Solaris applications and Linux (RedHat) kernel.Help make common source solaris/64/32/Linux.Profiling (lockstat) for performance tuning and finding bottlenecks in system.Login security (PAM).Process chains in the kernel, using vnode/inode and proc structureAssembler stack manipulationDevelop kernel security system for HP-UX 11.0 (use q4), Have to figure out manyHPUX internals without the source code (reverse-engineering). Stack traces, memory protection. Full absolute path, vnode, and lookup, get user pc from kernel, memory allocation in kernel. Kernels threads and multiply re-entrant processes. Mutex and kernel locking of global data.Buffer Overflow Prevention (memory management). Multiply releases from specification and patents to qa/product release.

unix kernel

linux

Port SCSI storage gigabit fiber channel device driver (SAN) to Linux (2.4) from windows, set up. Make much of the code common between windows and Linux. Use gdb, serial line debugger to debug driver, need to modify lifo, step though the kernel. All work done on PC (x86). Loadable module (insmod). Different way of putting Networks into SCSI. Memory Management (mmu). Virtual memory. Completely ported product to linux.

Hanoi, Hanoi, Vn

linux

Set up and design wireless (802.11b) router on Linux (redhat), write perl scripts for network management.

Espoo, Southern Finland, Fi

Espoo, Southern Finland, Fi

Design and implement SNMPv3 system, on FreeBSD, Design Web based Security. Port all the MIBS to SNMPv3, modify the user interface to be compatible with the Nokia one, Internet routing group. Enhance UCD SNMPv3 for the Nokia FreeBSD system, design whole project completely. Multiply projects.

linux bonding driver

Дніпро, Ua

Port a SCSI disk driver to Solaris (DDI) and HPUX from AIX. Use gdb to debug Solaris driver (2.6

Be

Us

Write remote monitoring system using Perl, C++, SNMP, and system ran on Linux.

Us

Us

Us

Produce a small RMON Monitor application in MFC,VC++ and SNMP++ to run on Windows 95.

Santa Clara, California, Us

Port Acuson embedded SCSI driver to current version of LynxOS RTOS.

It

System Admin on Solaris May 97 Scientific SoftwareDebug, fix and test Windows/NT/95 Device Drivers

/Greystone Peripherals/MenageryDevelop interface on PCMCIA bus between embedded VX-Works RTOS and Windows/95 driver, Development was done on Windows/NT

Port (Hifn) RMON SNMP to i960, development was done on Windows 95 and embedded RTOS system.

Develop part of fault-tolerant NFS system, quotas, and Perl script, multicasting.

Ported RMON SNMP to embedded VX-Works RTOS, on Hitachi

Houston, Texas, Us

Houston, Texas, Us

Port debugger to 64 bit hardware, Multi-Processor, Networking, TCP/UDP/IP internals, Develop Embedded Ethernet Device Driver, bootp, RIP, tftp, rarp, on HP RTOS. Hardware bringup.

Implement Patches on Solaris Kernel.June 96 KLASolve problem with inetd

Port a database package (essbase), from Visual C++ (Windows) to Solaris.

Modify drivers for ATE, Design RS232 interface for Robotics and X-Windows, diagnostics, system was done on Sun.

Develop Systems Admin client-server application using C++, Visual C++, RPC, Novell, Solaris and DOS, Windows.

Simulate Hardware. Use TCP/IP, RPC, write graphics device driver on OSF/1, Alpha. Modify Kernel. Rebuild Profiling Kernel. Context Switching, Memory management, DMA.

Cellular base station (CDPD) design and implementation. Wireless communication. TP4, CLNP, MDLP, TCP/IP, X.25, LAPD, Frame Relay. This was all done with byte-based sockets (SOCK

Network design. Evaluate ATM/FDDI/Fast Ethernet vendors. Develop tests for TCP/IP, UDP and NFS, Write file system utility, performance analysis.March 93 ZD (Ziff Davis) Labs, Verity, Data Storage SystemsGeneral UNIX Consultancy, fix bugs, enhancements etc.

Hired sub-contractor and put together a consulting team to design and implement a tape Librarian robot system on a SUN IPX. Write streams device driver for Legato Networker.

Solved NFS speed problems, Fixed many bugs in SunOS paint program. Ported UNIX drivers, Ported paint program from Silicon Graphics (Mips) to pSOS.

Apple)Port serial device driver to 486 from 68000. OS was NeXTSTEP(Mach).

Designed and implemented TCP/IP client/server network connection to a real time UNIX Port windowing package to UTS and develop RPC network.

TCP/IP, Ethernet on UNIX V.4 (486 computer)

Network layer and portions of transport layer for OSI/OSI-like, streams GATEWAY on 486 UNIX V.4 system. Wrote streams based module. Kernel modifications. Analyze and fix many Kernel crashes in areas of interrupts, priorities, overwriting memory, inodes, I/O subsystem etc, on a RISC based multi-processor computer. Wrote Daemons to monitor the device drivers, Wrote DLPI network device driver with streams.

Designed and implemented systems architecture and the HDLC I/O processor link with the radar.

Develop Satellite network, HDLC (X.25 project). Implement all protocols in firmware.

Develop internal software tools, including the design of a UNIX based cross assembler,

Bsc, Computer Science

Advanced Certificate In Computer Science, Computer Science

Education record