Sheldon Linker, ISAM Developer in Irvine, CA, United States
Sheldon Linker

ISAM Developer in Irvine, CA, United States

Member since June 14, 2020
Dr. Linker has been doing consulting/contract programming (and other job functions) for decades. He has specialized in database work since 1978. His doctoral work involved AI and knowledge bases. He is also adept at programming servers, client systems, desktop systems, embedded systems, and a number of other types of systems. He has served in a database, programming, business analyst, and project management capacity. He currently teaches the latter two at the University of Maryland online.
Sheldon is now available for hire


  • University of Maryland
    Quality Assurance (QA), Performance Tuning, Cron, KornShell...
  • Freelance
    Quality Assurance (QA), Data Cleaning, Data Cleansing, Big Data, Oracle DBA...



Irvine, CA, United States



Preferred Environment

Mainframe, Embedded Systems, Win32, .NET, Windows, Java, C++, Linux, Unix, SQL

The most amazing...

...project I've worked on was the Strategic Defense Initiative; I optimized a message-passing system, allowing throughput to enable taking out an incoming ICBM.


  • Adjunct Professor

    2016 - PRESENT
    University of Maryland
    • Taught students project management and operational techniques involving requirements gathering, requirements writing, choosing a project methodology, and QA.
    • Helped to write and improve new textbooks currently in use.
    • Helped to update the curriculum (currently under review for use next year).
    Technologies: Quality Assurance (QA), Performance Tuning, Cron, KornShell, Writing & Editing, Lecturing, Management, Analytical Thinking, Debugging, Code Architecture, Business Analysis, Shell Scripting, Project Management, Unix, Microsoft Excel, Architecture
  • Full-stack/Desktop/Embedded Developer

    1984 - PRESENT
    • Vastly improved the operational speed and normalization of databases for a number of clients.
    • Simplified the amount of code in use (and the time taken) by a number of clients' applications through rewriting and refactoring of code.
    • Improved system design resulting in shorter and clearer message flows and business processes.
    • Managed projects, sometimes from the onset, and sometimes from the point of original failure to successful completion.
    • Brought clients' website ideas from original sketches to finished websites, boxed products, and embedded products.
    • Closed security holes for a number of clients, including insurance and banking endeavors.
    • Helped in the transition from one system to another, such as SQL Server to Oracle and DB/2, from Borland C to C#, and from Amiga to Mac, Windows, and SGI.
    • Found and fixed a number of bugs for a variety of clients.
    Technologies: Quality Assurance (QA), Data Cleaning, Data Cleansing, Big Data, Oracle DBA, Enterprise, Performance Tuning, SDKs, Indexing, BI Reporting, ETL Development, Analysis, Business Process Analysis, Business Rules, Business Logic, T-SQL, POSIX, Embedded C++, Embedded C, RESTful APIs, REST APIs, REST API, Data, Analytics, Hibernate, SSRS, Cron, Pascal, KornShell, Prolog, SSRS Reports, Software QA, ASPX, REST, z/OS, Acceptance Test-driven Development (ATDD), JCL, AS/400, Kofax, Data Visualization, Data Migration, Writing & Editing, Database Analytics, Data Engineering, APIs, Oracle 12c, PL/I, ETL Implementation & Design, Oracle RDBMS, DB, Column-oriented DBMS, Database Triggers, Stored Procedure, Database Modeling, Management, Yacc, Analytical Thinking, Master Data, Data Aggregation, Reports, Modeling, Debugging, Code Architecture, Complex Data Analysis, Data Quality Analysis, Triggers, Relational Database Services (RDS), Relational Database Design, Relational Data Mapping, Stored Procedures, Query Optimization, Database Table Optimization, Data Architecture, Database Optimization, Data Analysis, Data Modeling, Reporting, Business Analysis, ISAM, Shell Scripting, SQL Server Reporting Services (SSRS), Python, Node.js, Teradata Databases, Teradata, Test-driven Development (TDD), NoSQL, Visual Basic for Applications (VBA), Project Management, Machine Learning, Data Analytics, Artificial Intelligence (AI), PostgreSQL, MySQL, Visual Basic .NET (VB.NET), JSP, Web Architecture, API Architecture, Microsoft Access, Visual Basic, Business Intelligence (BI), Microsoft Excel, Data Warehouse Design, Data Warehousing, PHP, SQL Server Integration Services (SSIS), SQL Server 2014, Microsoft SQL Server, ETL, IBM Db2, Oracle SQL, Oracle, Oracle PL/SQL, SQL Architecture, Database Management Systems (DBMS), Oracle DBMS, SQL Triggers, Database Transactions, Relational Databases, Transact-SQL, SQL Stored Procedures, Database Architecture, Database Design, Databases, PL/SQL, C, Data Profiling, Data Analyst, Data Reporting, JavaScript, HTML, Fortran, CSS, Crystal, COBOL, C#, C++, BASIC, Assembly, ASP, APL, Architecture, Financial Reporting Dashboards, Financial Reports, CSV File Processing, Database Development, Consulting, Oracle SQL Data Modeler, SQL Server 2017, Database Performance, Database Schema Design


  • JCB™ English and JCB Robotics (Development)

    A knowledgebase/AI that can learn, understand, and make intelligent decisions. Additionally, JCB Robotics can reject a command based on safety/morality grounds. You can see my patents by searching on or go to the product website.


  • Languages

    APL, Assembly, C, C++, C#, Fortran, HTML, Java, JavaScript, PHP, PL/I, SQL, Crystal, Stored Procedure, Transact-SQL, Embedded C, Embedded C++, T-SQL, Visual Basic, COBOL, CSS, Visual Basic .NET (VB.NET), Pascal, Prolog, Visual Basic for Applications (VBA), Python, BASIC
  • Libraries/APIs

  • Tools

    Oracle SQL Data Modeler, JCL, Microsoft Access, Microsoft Excel, Cron, SSRS
  • Paradigms

    Management, ETL, Database Design, ETL Implementation & Design, Database Development, Business Intelligence (BI), API Architecture, Web Architecture, Acceptance Test-driven Development (ATDD), REST, Test-driven Development (TDD)
  • Platforms

    Linux, Windows, Oracle, AS/400, z/OS, KornShell, Unix, Win32
  • Storage

    IBM Db2, PL/SQL, Databases, Microsoft SQL Server, Database Architecture, Database Modeling, SQL Server 2014, SQL Server Integration Services (SSIS), SQL Stored Procedures, Relational Databases, Database Triggers, Database Transactions, SQL Triggers, Oracle DBMS, Database Management Systems (DBMS), Column-oriented DBMS, SQL Architecture, Oracle PL/SQL, Oracle 12c, Oracle SQL, DB, Oracle RDBMS, SQL Server 2017, Database Performance, MySQL, PostgreSQL, Teradata, Teradata Databases, NoSQL, SQL Server Reporting Services (SSRS), Oracle DBA
  • Other

    Shell Scripting, ISAM, Yacc, Business Analysis, Reporting, Data Modeling, Data Analysis, Data Architecture, Database Optimization, Database Table Optimization, Query Optimization, Stored Procedures, Relational Data Mapping, Relational Database Design, Relational Database Services (RDS), Triggers, Data Reporting, Data Analyst, Data Quality Analysis, Data Analytics, Complex Data Analysis, Code Architecture, Debugging, Modeling, Reports, Data Aggregation, Data Profiling, Master Data, Analytical Thinking, Data, SDKs, Business Logic, Business Rules, Business Process Analysis, Analysis, ETL Development, BI Reporting, Indexing, Performance Tuning, Data Cleansing, Data Cleaning, Architecture, CSV File Processing, Consulting, Database Schema Design, Kofax, Data Migration, Writing & Editing, Lecturing, Data Warehousing, APIs, Data Warehouse Design, Data Engineering, Database Analytics, Data Visualization, Analytics, Enterprise, Big Data, Quality Assurance (QA), Financial Reporting Dashboards, Financial Reports, Software QA, Artificial Intelligence (AI), Machine Learning, Embedded Systems, Mainframe, SSRS Reports, RESTful APIs
  • Frameworks

    ASP, JSP, .NET, Hibernate
  • Industry Expertise

    Project Management


  • PhD in Computer Science and Software Engineering
    2008 - 2011
    Auburn University - Auburn, AL
  • Master of Science degree in Computer Science
    2006 - 2008
    University of Illinois - Springfield, IL
  • Bachelor of Science degree in Applied Science and Technology
    2004 - 2006
    Thomas Edison State College - Trenton, NJ
  • Coursework in Electrical Engineering
    1973 - 1977
    University of California - Berkeley and Los Angeles, CA

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