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  • CV: Guidance, Navigation, and Control Engineer

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    Personal information
    Contact information
    Candidate Profile
     Date Submitted:26-08-2012
     Last Modified:26-08-2012 (12:17)
    Job information
     Current job:Guidance, Navigation, and Control Engineer
     Employment Term:Permanent
     Job location:US only
     Date available:within 2 months
     Industry:Civil Agencies/International Organizations, Satellite Manufacturers and Subcontractors, Satellite Operators, , , Launch Systems, Space Tourism
     KeywordsGuidance, Navigation, and Control Flight Software Integration Hardware/Software integrated testing Hardware design and procurement Procurement oversight System of Systems Integration


    Summary of Qualifications

    Aerospace engineer with broad knowledge of aerospace vehicles, subsystems, and the interaction among them.  Specialized knowledge of navigation and control (GN&C) systems.  Over 20 years of diverse experience spanning the lifecycle of highly successful programs,  with 17 years on NASA’s International Space Station, including spacecraft Guidance, Navigation, and Control systems; sustaining engineering and spacecraft mission operations; flight software verification; hardware procurement; integrated vehicle performance; end-to-end system verification; and mechanical design. 



    CI Poly 05/2007


    Expertise and Critical Contributions

    Organized and lead multi-disciplinary team spanning vendor, prime contractor, and government organizations at multiple sites to redesign, rebuild, test, deliver, and integrate NASA’s International Space Station control-moment gyroscope qualification unit as a flight-worthy spare.  Built enduring positive relations among government customer, prime contractor, and vendor organizations.

    • Developed subcontractor Statement-of-Work.  Facilitated proposal development.   Participated in fact-finding and contract negotiations. 
    • Performed vendor technical oversight, coordination, and management during redesign and rebuild.  Gained approval of technical approaches from prime and government engineering organizations.  Initiated Material Review Board technical review and disposition of flight-worthiness issues. 
    • Integrated rebuild schedule into manned space program traffic model, payload hardware development schedule, payload integration schedule, and existing spares maintenance schedule for seamless availability of spares. 


    Improved system performance, health and safety by identifying and resolving anomalous signatures and adverse trends in spacecraft GN&C operational hardware,  improving processes and interfaces and optimizing performance. 

    • Identified anomalous pointing controller performance incurred by lubricant breakdown.  Created and lead ad-hoc, geographically disperse study team of technical experts which synergistically analyzed and resolved the issue.  Leveraged factory expertise. 
    • Investigated pointing control system state estimator modifications to save computational requirements by optimizing friction prediction algorithms.  Performed 6 degree-of-freedom (DOF) simulations of reduced-authority controllers, demonstrating adequate performance margins.
    • Identified out-of-family degradation of navigational sensor hardware and implemented compensating software changes.
    • Developed requirements and designs for software and displays which monitor spacecraft zero-fault tolerant conditions, detects and responds to failures.  Optimized software autonomy and minimized operator input requirements.  Developed and optimized operator procedures.


    Defined and executed Design Analysis Cycles for International Space Station.   Developed Design Reference Missions and defined analytic baselines for design and mission.  Gained commitments for analyses and negotiated delivery schedules from geographically and organizationally disperse engineering community.  Integrated analysis results across diverse engineering disciplines and mission phases.  Resolved complex multidisciplinary issues among stakeholders.  Impacted design requirements and mission definition.


    Verified International Space Station Guidance, Navigation, and Control flight software interfaces and requirements using test, observation, demonstration, and analysis of Mil-Std-1553B bus data in integrated hardware/software laboratory.  Hardware-in-the loop testing using real-time simulations.  Developed MATLAB analytic tools for the reduction of data captured using Protocol and Simulation Software (PASS).  Maintained test data and history of anomalous behavior. 


    Experience & Work History

    2004 to Present - Flight Control System Analyst, Boeing-Colorado

    Provided direct support to flight operations, test, anomaly resolution, and vehicle recovery.  Performed trending and analysis of vehicle attitude determination and control systems, periodic subsystem health and integrity checks, command path verification and sensor calibrations. 

     1999 to 2004 – GN&C Systems Engineer, Boeing - Houston TX

    Provided direct support to launch, check-out, and sustaining engineering for GN&C subsystem of International Space Station.  Performed subsystem trending and characterization.  Identified root-cause and resolved on-orbit issues with flight software performance. 


    1994 to 1999 - Senior Systems Engineer, Boeing – Houston TX

    Lead Sustaining Engineering and Operation efforts of Vehicle Integrated Performance team for ISS.   Lead and focused sustaining engineering planning and task definition.  Performed systems engineering analyses, coordination, and resolution of complex multidisciplinary vehicle performance issues. 

    • Primary liaison between U.S Space Station Vehicle Integrated Performance team and Russian Automated Rendezvous and Docking (AR&D) teams.  Built positive relations with representatives of Russian Space Agency and Russian industry partners during technical interchange meetings and regular teleconferences. Contributed to resolution of Russian vehicle rendezvous radar anomalous behavior. 


    1991 to 1994 - Flight Systems Engineer, Grumman Aerospace, Houston TX.

    Implemented Design Analysis Cycles for International Space Station.  Defined baseline missions and designs.  Gained commitments for analyses from diverse engineering community.  Integrated analysis results into requirements and operational constraints.  Resolved complex multidisciplinary issues.  Impacted system design and mission definition.

    • System Engineering and Integration focal for verification of Guidance, Navigation, and Control (GN&C) system.  


    1987 to 1991 - Design Engineer, Grumman Aerospace – Houston TX

    Performed system-level analysis and derived system-level requirements for various critical resources (i.e. weight, power, volume, logistics, and thermal capacity) of International Space Station.  Designed various mechanical restraints and mobility aids for International Space Station.  Produced engineering drawings and solid models using CAD/CAE skills.

    1985 to 1987 – Associate Engineer, Veda Incorporated, Arlington VA

    Provided engineering and managerial support to the Land-Based Fixed-Wing Aircraft Class Desk of Naval Air Systems Command (NAVAIR), and to the Anti-Submarine Warfare Aircraft Test Directorate (ASW ATD) of Naval Air Test Center (NATC) in Patuxent River MD.  Analyzed, developed and revised top level test planning documentation and tracked flight test completion. 



    Bachelor of Science in Aerospace and Ocean Engineering

    Virginia Polytechnic Institute and State University,    1986


    Extensive graduate course work in Aerospace Engineering

    University of Colorado-Boulder         

    - Space Flight Dynamics

    - Linear Control System Design

    -Statistical Orbit Determination (Batch, Kalman and Extended Kalman filters)

    - Global Navigation Satellite Systems (GPS/GNSS)

    -Aerospace Environment

    - Aerospace Math I and II



    - Boeing "Leadership for Space"

    - APOLLO Root Cause Analysis training

    - Boeing "Pre-Management Aptitude Program"

    - "Birkman Assessment of Motivational Behavior"

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