Software engineer with professional experience providing software development, integration and test expertise. Experienced in creating, maintaining, integrating and testing software in Windows and Unix environments. Developed modular components for a variety of application systems using technologies such as Spring and J2EE. Distinguished performance driving innovation with expertise in various programming languages including Java and C++. In addition to my industry activities, I am an active participant in various community service and volunteer groups. I'm currently involved in the DC/Maryland chapter of amyotrophic lateral sclerosis (ALS or Lou Gherig's disease) where I visit patients and help them set up hardware and software for their computers that would enable them to use their machines without the use of their hands. I also work with the FIRST Lego League where I mentor robotics teams and I help judge at the state and world competitions.

Sr. Software Engineer @ Currently, I'm on a project as a Java PKI developer on an agile development program providing development support for Type 1 PKI key establishment. My development activities include using a combination of Java products (J2SE, J2EE, Spring, Hibernate), CM and build management tools (IBM Rational, Jazz, Maven), XML technologies (WSDL, SOAP, JAXB), database software (Oracle, MongoDB), in a virtualized environment using both Windows and Linux (Red Hat) platforms. Additionally, I also provide integration and build management support using Nexus and Jenkins. I worked as J2EE developer on a modernization effort of analyzing cryptographic software coded in PL/I and translating them over into Java. I performed requirements gathering, system design, integration testing, and conduct team peer reviews in addition to coding duties. I served as a cloud analytic developer on a project that specializes in trending patterns. The analytics are implemented analytics using Hadoop MapReduce and I created custom data visualization web applications using ExtJS and RESTful web services. At times, I present the analytics at quarterly technical fests. Outside of analytic development, I develop components for the project's common API which would help promote code reuse for the other analytic projects. I worked on a mission visualization system that is deployed on a widget framework. I coordinated the development, integration and documentation on a variety of efforts including creating metrics reporting, temporal, and geolocation visualizations in ExtJs and developing backend resource servers using J2EE technologies. I also implemented visualization prototypes that could have the potential to released in later spin cycles. Outside of my development duties, I (at times) served as the operational coordinator where I handle any client/customer needs related to the system. From August 2012 to Present (3 years 5 months) Software Engineer @ I served as a developer and integrator on a signature repository project. I coordinated the development, integration and documentation efforts. I also assist with handling all of the bug fixes and provides server environments for the test team which allows for proper testing and provide workshops for his team on unit testing best practices. I worked as a Java software developer providing software engineering, development, integration and testing support for a network analysis system. Prior to that, I developed web portlets for an Operational Performance Assessment portal within a J2EE environment. On a previous project, I developed and maintained software on an object oriented C++ framework which included tools that used OCR recognition software and tools which performed various types of signal and image processing. From June 2001 to August 2012 (11 years 3 months) Teacher Assistant (School of Business) @ Assisted students in Management of Information Systems and Introduction to Computer courses. Gathered research information for classes at the instructor’s request From September 2000 to December 2000 (4 months) Data Warehouse Developer @ Developed a prototype of a Customer Account Workstation that would be utilized over the data warehouse corporate network. Developed the web application using HTML, Java and JavaScript. Assisted the data-warehousing department by developing SQL scripts for the database management systems by using a COTS application called SilverRun RDM (Relational Data Modeling) to develop entity relationship diagrams. From May 2000 to August 2000 (4 months) Washington D.C. Metro Area

MS, Information and Telecommunication Systems @ The Johns Hopkins University - Carey Business School From 2002 to 2006 BS, Systems and Computer Science @ Howard University From 1997 to 2001 Marcus Johnson is skilled in: Software Engineering, Software Development, Eclipse, Java, Java Enterprise Edition, Linux, Integration, JavaScript, SQL, REST, C++, Agile Methodologies, Testing, Web Services, Weblogic