Experience

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  Star Lab, a Wind River Company

  • Broomfield, Colorado, United States

  • Member of Technical Staff - Embedded Security

    • May 2020 - Present
    • Broomfield, Colorado, United States

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  Pivot3

  • Louisville, CO

  • Senior Staff Software Engineer

    • Feb 2017 - Mar 2020
    • Louisville, CO

    Developed data-path software for leading edge Hyper-Converged (HCI) appliances running in a multi-node, VMWare virtual machine on commodity hardware. Software included implementation/porting of encryption and compression engines (Intel ISA-L and QuickAssist). Principal developer of key management interface to HyTrust KeyControl software.

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  Oracle Corp.

  • Broomfield, CO

  • Principal Engineer

    • Jul 2005 - Jan 2017
    • Broomfield, CO

    System software architect for Oracle Open Attach Virtual Tape Library System.The system is a high speed, multi-threaded disk cache for tape clients. In addition to the core system, a VM (Solaris LDOM) was implemented to host an application that originally ran on an external server.Responsible for project planning, hiring, design, implementation and test. Originally hired as a consultant to refactor, troubleshoot and ultimately port a set of Linux kernel modules/drivers from Linux to Solaris.Implemented buffer/memory management modules to allocate and manage kernel DMA buffers mapped to multiple user space processes allowing fora zero copy data path.Designed and implemented a multi-node grid computing environment using Oracle Coherence.Refactor Linux driver and kernel modules to eliminate redundant and overly complex code and move modules to user space that were improperly constructed as kernel code.Technical lead for a team of 5-15 software engineers. The technical lead role includes defining designs,assisting upper management with hiring, scheduling and task allocation for all software tasks as well as monitoring and mentoring individual engineers.Responsibilities also include individual design and development contributions.Portions of the system were ported from Linux kernel driver modules to Linux user space applications and ultimately to Solaris.Several components are also being designed from the ground up.These include a fiber channel device driver and modules that perform command/data routing, DMA buffer allocation and management, tape drive emulation,and backend storage.Member of the department's cross functional architecture team tasked with complete system design and initial conception of future products.

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  HEI, Inc. / Colorado MEDtech, Inc

  • Boulder, CO

  • Principal Software Engineer

    • Jun 2000 - Jun 2005
    • Boulder, CO

    Lead software engineer on development of a NET+ARM / uClinux product. This product operates within a self-forming grid which acts as an acquisition application and communications gateway between medical devices (Infusion pumps, etc.) and hospital information systems.Design included customization of the Linux kernel and all associated device drivers.Lead software engineer for a Linux-based MRI biopsy device.The device performs real-time fluoroscopy image acquisition, needle tracking and target verification.The software is built using GTK/GTK GUI libraries and IDL for the image analysis tasks.Development of MRI pulse sequence control module.Responsible for guiding the development efforts of a team of six software engineers on a project toredesign the control software for a Hitachi 1.5T MRI system.Developed software for the pulse generation hardware, front-end control systems, image reconstruction, and data capture and display (Qt/OpenGL/IDL).Extensive direct customer contact including planning, design, reviews, and project updates.Initial design and proof of concept of MRI guided real-time biopsy and tissue harvesting system.Completed port of uClinux (embedded Linux) OS to a NET+ARM embedded platform, including serial port,Ethernet drivers and TCP/IP and Bluetooth communication protocol stacks.

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  Direct Radiography Corp.

  • Newark, DE

  • Senior Software Engineer

    • Jun 1997 - Jun 2000
    • Newark, DE

    Projects included development of an image acquisition system and processing library that allows OEM customers to interface to the DirectRay line of products.This software consists of an application-programming interface (API),image-processing library, andproprietary device interface including a SCSI device driver.The initial target platform was Linux but the product also required cross-platform compatibility between Linux, Windows NT, and Solaris.Completed several applications designed to acquire, display and transmit(DICOM) medical imagesproduced by a direct digital x-ray detector (Linux, Solaris, Windows NT).