Darrin Walker Email & Phone Number

Reston, Va, Us

Provide software reliability and quality assurance services to NASA and NASA contractors. Primarily support Artemis and ISS related projects. Participate in the entire software lifecycle applying Agile and Model Based System Engineering methods. Use Cameo and Magic Draw tools to assist in the design process of Artemis projects. Perform static analysis and software code reviews. Present findings to stakeholders at Project Status Reviews and Working Group meetings. Provide guidance and recommendations to senior management.

Cedar Park, Texas, Us

Developed the Blue Ghost lunar lander ground station capabilities. Designed a Payload Operations Center to handle the ground commanding of the lander and telemetry from the spacecraft and payloads. Developed the payload command and data handling ICD.

Webster, Texas, Us

Responsible for all IT infrastructure supporting tele-science for the Materials ISS Experiment (MISSE) payload onboard the International Space Station (ISS). As a working manager I performed system administration for Windows Servers hosted on a VMWare ESXi cluster. Managed the systems with the VMWare vSphere web client, Horizon View Virtual Desktop Infrastructure, and Veeam backup software. Designed and implemented a specialized MISSE Payload Operations Control Center with connections to the near real-time telemetry streams from the NASA Huntsville Operations Support Center. Member of the team that wrote the software ICD for MISSE command and telemetry processing. Communication interfaces include RS-422/485, 1553, and Ethernet. Wrote the Command and Data Handling Interface Control Documents for MISSE. Processed the daily MISSE telemetry that was stored in an Oracle database using Python scripts to provide customers with their technical data reports and other deliverables. Performed daily ground commanding and mission planning for the MISSE payload. Worked with MISSE customers to ensure they were satisfied with experiment operations and that all technical requirements were met. Active Secret Clearance.

Webster, Tx, Us

Supported IT infrastructure and payload operations for the DoD Human Spaceflight Support contracts at the NASA/Johnson Space Center. Performed system administration for Windows Servers, VMWare, and a SQL Server database. Provided USAF near real-time payload operations for over 100 payloads destined for the Space Shuttle and International Space Station during my tenure. Used the NASA core Flight System (cFS) for development of satellite command and data handling systems. Led a team of personnel to design and implement a Payload Operations Control Center. Followed the formal engineering design process including System Requirements Review, Preliminary Design Review, Critical Design Review, and flight safety reviews for all projects. Performed both payload integration and payload operations duties. Supported payload testing activities such as vibration, thermal vacuum, and electromagnetic interference testing. Utilized the Flight Analysis & Design System and the Satellite Tool Kit for orbital analysis. Trained astronauts on payload operations, procedures, and purpose. Maintained a DoD Secret Clearance.

Reston, Va, Us

Managed SAIC personnel for the DoD Human Spaceflight Payload Support contracts at the NASA/Johnson Space Center. Supervised SAIC employees, managed task orders, conducted performance reviews, and staffed engineering positions. Performed payload integration and computer system administration duties. Responsible for a network of Windows Server, Windows desktops, and UNIX based systems. Developed special software applications written in languages such as Visual Basic, Cold Fusion, Java, Python, C, FORTRAN, Ada, and UNIX scripts. Performed mission planning, crew training, real-time operations support, and orbital analysis using Satellite Tool Kit. Maintained a DoD Secret Clearance.

Us

Managed a network of Sun SPARC workstations running Oracle databases. Database Administrator for both the corporate offices and onboard all ocean-going vessels. Performed remote database and operating system administration utilizing satellite links to vessels. Responsible for the operation and maintenance of computer systems, upgrades to software, database support, help desk support, problem determination, and maintenance of communication links to vessels.

Houston, Tx, Us

Supported software development and maintenance. Wrote programs in C, FORTRAN, Python, and Unix scripts to support the Space Shuttle Program. Supported software reconfiguration and verification for the Descent flight phase of the Space Shuttle. Notable projects included the re-host of many Spacecraft Trajectory & Mission Planning software tools into the consolidated Flight Analysis & Design System.

Armonk, New York, Ny, Us

System Administrator for primarily IBM mainframe and mini computer systems. Operating systems included MVS and VM/SP. Wrote programs in REXX, EXEC2, JCL, and PL/1 to support computer operations. Notable projects included USAF Satellite Data Systems Modernization, Arizona Public Service power grid control, and NASA Mission Control Center development projects.