RESUME - Michael O'Donnell

Principal Engineer

• Analyze/repair defects in the (C++ coded) CIFS/NetBIOS filesystem virtualization service of the ARX router.

Stratus Technologies, Maynard, MA (11/03 - 03/06)

Kernel Engineer

• Design/implement disk "scrubber" providing earlier detection of faults in the component disks of Linux RAID1 configurations.
• Debug/harden Linux e100/e1000 ethernet and bonding modules for use in Stratus fault tolerant systems; clean up supposedly PCI HotPlug-compliant sections; shepherd changes back to Linux community directly and also via RHAT/Novell.
• Serve as Linux team's liaison to Tools group during contentious conversion from CVS to in-house revision control system based on ClearCase.
• Debug/enhance middleware library linking Stratus fault-tolerant services to Linux SNMP agent.

Mission Critical Linux, Lowell, MA (8/00 - 10/03)

Kernel Engineer

• Port Linux to various embedded/custom PPC systems (including Galileo GT64260 system controller reference implementation); develop platform/board support for Ethernet, MMU, interrupt, PCI and RS232.
• Analyze/repair internally and externally reported defects in Linux.
  
• (after headcount reduced from 140 to 7) Support development of NetGuard/DataGuard High-Availability clustering products; create file mirroring utility, debug daemons/libraries, integrate ethernet channel bonding, characterize performance of various Linux filesystems WRT fully synchronous writes.

Mercury Computer Systems, Chelmsford MA (3/98 - 7/00)

Senior Software Engineer

• Design/implement a scalable spinlock subsystem for Mercury multicomputers; deploy in heterogeneous systems comprising more than 256 processors.
• Analyze/repair internally and externally reported defects in MC/OS.
• Improve source code analysis tools; introduce Glimpse/ctags and create scripts enabling Cscope to operate in Mercury development environment.
• Create example programs illustrating use of software synchronization algorithms on Mercury multicomputers.

The Open Group (formerly OSF), Cambridge MA (7/94-8/97)

Senior Research Engineer

• Serve as technical liaison to a corporate client for the duration of an ARPA-funded project; advise and participate in development of real-time execution environment for client's target system based on Paragon supercomputer technology and OSF1/Mach; perform wide range of development and support tasks; travel to client site intermittently to assist in configuration/deployment and for general handholding.
• Port OSF1/Mach kernel from uni- to multi-processor Paragon nodes; primarily responsible for low-level interrupt and memory management code; hit all milestones in an aggressive schedule.  (team of 3)
• Enhance OSF1/Mach boot loader to load ELF binaries and properly initialize C++ images.
• Participate in creation of Java runtime environment using C++; implement portions of the Java Virtual Machine supporting math primitives, switch statements, arrays, etc; port entire project from Gnu G++ to a pre-release version of HP's ACC; maintain/enhance scripts and rules files in ClearCase-based development environment.
  

Concurrent Computer Corporation (formerly MassComp), Westford MA (12/89-6/94)

Senior Software Engineer, RTU (Real-Time UNIX) development group

• Design and develop RTU kernel subsystem for managing specialized counter-timer hardware; develop syscall interface and user libraries implementing a Posix 1003.4-compliant interface to that subsystem.
• Port RTU from Concurrent's 68030 to SMP 68040 system.  (Team of 3)
• Debug and enhance RTU kernel, libraries and utilities; includes VM, exception handling, file system, kernel debugger and SMP synchronization issues.
• Perform onsite debug/enhancement of customer applications and RTU; involves international travel.  (Salvage some critical accounts.)
• Port utilities/libraries from 680x0 systems to MIPS R3000 system.
• Develop standalone diagnostics monitor for Concurrent's 680x0 and MIPS R3000 platforms; port standalone utilities to run w/this monitor; rework monitor on short notice to serve as R3000 system boot ROM.

Wang Laboratories, Lowell MA (11/84-12/89)

Software Engineer, Wang VS UNIX Group

• Participate in port of VS UNIX kernel from VM environment to Native VS.
• Debug and enhance kernel, libraries and utilities.  (Team of 3)
• Install, debug and support VS UNIX in both native and Virtual Machine environments on various departmental systems within Wang.
• Institute management of VS UNIX sources using Berkeley Revision Control System; arrange nightly and multi-version builds/releases.

Software Engineer, Wang Xenix Group

• Develop 80286 Xenix device drivers for SCSI disks and tapes, QIC-02 tapes, bitmapped CRT and for virtual disks via (proprietary) network link to WANG file server.
• Diagnose bugs in Xenix kernel, libraries and utilities without access to source codes.

Software Engineer, Wang Desktop Systems Group

• Enhance Wang 8086 PC's emulation of the IBM-PC; port emulation subsystem to Wang's 80286 APC; develop emulation BIOS code and rework existing routines in an "intellectual property clean room".
• Develop MS-DOS virtual disk device driver utilizing (proprietary) network link to WANG file server.
• Serve as liaison to hardware group developing an ASIC implementation of an instruction prefetch monitor for the 80286; write an assembler to aid in programming the state-machine PAL.

Analogic Corporation, Peabody MA (7/82-11/84)

Programmer

• Develop firmware to control/tune a high-power RF amplifier for an MRI system; invent simple multitasking executive, control stepper motors, coordinate sensor data, communicate with host.
• Debug 68000 assembler routines in the D6000 waveform analyzer.
• Design and develop a debugging tool using C and 68000 assembler.

Technician (contracting)

• Breadboard and debug prototypes of hardware designs

Kollsman Instruments, Nashua NH (12/81-4/82)

Technician (contracting)

• Test/troubleshoot the Cobas-BIO blood spectroanalyzer in production.

Raytheon Flight Facility, Bedford MA (8/81-11/81)

Technician (contracting)

• Construct chassis and cables for military avionics systems.