Resume of Cliff Green

Contents

• Executive Summary
• Technical and Specialized Knowledge Summary
• Corporate Work History
• Instructor Work History
• Education
• Contact Info, Related Links (Quick contact: cliffg@codewrangler.net, 206-363-9852)
• Download this Resume in MS Word Format (better printer formatting)

Executive Summary

My skills, strengths and interests are in designing mission-critical and strategic software architectures that are robust, extensible, flexible, elegant, and achieve results. My 18+ years of experience centers on distributed, networked and multi-platform products. Typically these are written in the C++ language, in which I'm very experienced (e.g. advanced template usage and metaprogramming, generic programming). Appropriate design technologies (O-O and generic designs) and library or component development and usage (e.g. Boost C++ libraries) are critical to efficient, timely, and effective deliveries.

I am creative, conceptual, project oriented, and have a passion and natural ability for teaching and sharing technical knowledge.

Technical and Specialized Knowledge Summary

Languages:

C++ (ISO / ANSI standard, expert level), C, Java, Fortran, Pascal, Cobol, Prolog, Tal, SPL, Basic.

Operating Systems:

Unix (Solaris on Sun Enterprise / Ultra, HP-UX and HP MPE on HP 9000 / 3000), Linux, MS Windows (XP and older), LynxOS (RTOS), Tandem Guardian, Dec VMS.

Networking Protocols, Components, Telephony:

TCP/IP (and UDP/IP, multi-cast, SNMP), XML, LTP (Location Transaction Protocol), WCTP (Wireless Communications Transfer Protocol), ISDN (including SS7 signaling protocol), X.25, DGMS Omni, Netex / Hyperchannel (NSC).

Databases, Object-Relational Products:

Oracle, Persistence (object-relational middleware), RogueWave DBTools, Sybase, Objectivity (OODBMS), Pathway (Tandem DB), Image (HP DB).

Development Environments, Tools, Messaging Middleware, other API's:

UML, CVS, Metrowerks CW Pro 8, MS VC++ 6.0, RogueWave Tools.h++, Sun Forte C++, Rational Clear and Purify, Talarian SmartSockets 5.5, SnapTrack SNAPI, Glenayre WMAPI, Corba 2.0, ESRI SDE (Spatial Database Engine), ESRI Arc/Info.

Corporate Work History

• Designed and implemented architectures and libraries for Majiq’s Elixir product (production management software, pulp and paper mill industry). Until bought by TeatoEnator (a Finnish IT services company), Majiq was re-designing and converting Elixir from a customized, support-intensive solution to a more economical, scalable solution. The original software is written in PL/1, running on a Stratus platform, without high-level database support. The future solution was being written in C++, using modern design architectures (object-oriented, generic) and modern tools (RDBMS, version and configuration control software).
• Developed, implemented, and taught multiple in-house courses on C++ and object-oriented design (with UML notations). These intensive four-week courses brought a student into C++ / OO / Design Pattern basic proficiency, shortening the normal long learning curve in these skills.

• Principal architect, designer, and implementer of the Locate Networks Core Location Services software. The CLS software provides location results (latitude, longitude, elevation) to requesting users (or to interested parties), which can be presented in a Web browser or e-mail or voice processing system. CLS interfaces with wireless network gateways / switches through protocols such as WCTP, and uses SnapTrack PDEs (Position Determination Entities) to calculate positions.
• CLS is designed for easy functionality enhancements (such as new wireless protocols), fault-tolerance, and scalability, with multiple processors running multiple instances of various CLS components. Messaging between component instances uses a publish and subscribe messaging model, which allows for very flexible and dynamic distributed processing. Each component is multi-threaded and highly efficient in processing transactions.
• Responsible for all early software architectures and development activities, before Locate expanded scope of services and functionality.

• One of the two principal software architects on the XYPOINT Gateway server and messaging software infrastructure. This architecture provides significant economic advantages through extremely fast service development time, constant uptime (no outages to install new services), efficient hardware utilization, and easy system monitoring. The server and messaging infrastructure is highly object-oriented, multi-threaded, completely distributed (no central point of control), dynamic, flexible, and extensible, and uses a publish and subscribe messaging model, allowing agents to dynamically register new types of services and messages.
• Principal architect and developer of the XYPOINT DGPS (Differential GPS) service and GIS foundation classes, providing the company a revenue source for various DGPS services and support for location based applications.
• Principal designer of the front-end ISUP call processing application for the XYPOINT Wireless Enhanced 911 service. This application is rock-solid and highly available, allowing XYPOINT to lead the cellular 911 industry in market share.
• One of the principal voice processing architects of the XYPOINT Web Wireless service, which extends time-sensitive Web services (such as e-mail, online auctions, and online stock trading) to cellular phones and other wireless devices.

• For the ISM/2000 network management product, accomplishments included defining and documenting a major portion of the hardware system architecture and configuration, writing various system requirements documents, verifying OSI network management compliance, and performing an extensive high availability configuration analysis.

• Software architect and principal engineer in development of a real-time SS7 (telephony signaling system protocol) usage measurement product named AMAT7. The product is a pioneer in SS7 measurement data collection, interfacing directly into SS7 network trunks and built on a portable (Posix.1 & 3), high-performance, distributed, fault-tolerant software architecture, and has been a significant financial success for the company.
• Designed and implemented a Sun workstation-based application that controls a Summa 4 telephone switch in call-processing. The application interfaces to the switch using TCP/IP as the transport (or an optional serial port protocol), provides call setup and switching by connecting input and output trunk ports (based on user-configurable database files). This application provides voice mail services for Washington state employees and significantly decreased expenses while providing enhanced voice mail capabilities.

• Principal designer and developer of an interactive real-time graphical software package (named NDREX) in use at the National Severe Storms Laboratory. This XWindows/Motif based package (coded in ANSI C with socket based TCP/IP calls) allows modeling, editing, and display of complex real-time Doppler radar images and algorithm output. This application has greatly increased meteorological scientist productivity, and a more recent version of it is shown in the movie Twister.
• Assisted meteorological scientists in developing severe storm algorithms used for wind shear detection, gust front prediction, and tornadic vortex detection on real-time digital processors, high-speed network links, and parallel/vector processors.

• Lead developer of Hyperchannel (50 Mbps LAN) device drivers and high volume multi-threaded network transaction servers for distributing multiple large databases between heterogeneous (HP, Tandem, Unisys, IBM) mainframe computer systems. This effort helped to save millions of dollars in conversion costs and increased transaction throughput (to 40 tps) and response times.
• Initial designer of the Hertz counter automation distributed database application, of which a later version is still in use today. This system interfaces with the large mainframe reservation system to provide an integrated flow of data from initial car rental reservation to final billing.

Instructor Work History

• Instructor (part-time for UW, full-time for Learning Tree) for C++ (Intro, Intermediate, Advanced) programming and O-O design courses. My course information is online as a service for my students. Consistently earned high evaluation marks, particularly for effective presentation and thorough subject matter knowledge.

Education

Contact Info, Related Links

Cliff's Other Web Pages