http://www.linkedin.com/in/markdavidgraybill

507-***-**** ad4sbb@r.postjobfree.com

Summary

• Critical domain experience including Department of Defense, Medical Devices, Operating Systems, FAA.

• Strong process background, experienced with FAA, FDA, MIL-STD, Agile (Scrum), CMMI L5, and ISO9001.

• SW Engineering: Systems, devices, full-stack, mobile, desktop, embedded; C++, C#, ReactJS, Linux, Windows. Experience

Technical Manager 2, International -- Ultra Intelligence & Comm, TX 2/2023 – 3/2024

• Enhanced and fix defects in the international ADSI codebase using C/C++ (Linux, SNMP, TCP, UDP).

• Led team in developing and managing program schedules, budgets, and capital/customer assets.

• Skills: C/C++, Linux, SNMP, TCP, DDS, leadership, budget, management, international customer relations.

Software Engineer 4 -- Ultra Intelligence & Comm, TX 5/2020 – 2/2023

• Engineered (OO/UML, C++) multithreaded (RHEL6 pthreads) UC2 Tactical Data Link (DDS/TCP, Marines MADIS).

• Refactored MADIS TDL for generic I/O and implemented for TCP CoT data link I/O on RHEL8 (C++).

• Found elusive multithreading issues (race condition) in MADIS core associated with ACE/RTTS timers.

• Skills: OOA&D, C/C++, JQuery, Qt, GitLab, XML, DDS, TCP, Linux, DDS.

Software Engineer 3/Lead -- C. H. Robinson, MN 2/2019 – 5/2020

• Led team on advanced C# techniques and improved design/algorithms incl. previously unsolved problems.

• Engineered and reengineered internal software bringing $10B+, using C# .NET, Core, MS SQL Server.

• Introduced additional concepts in quality efforts including mutation testing and performance statistics.

• Skills: C#, ReactJS/TypeScript, SP/SQL, OOA&D, RESTful, Azure, Git, VSCode.

Lead/Sr. Analyst/Programmer -- Mayo Clinic, MN 4/2009 – 2/2019

• Led enterprise workflow SaaS development (C#, JS/JQuery, RESTful) achieved practice-convergence goal.

• Engineered e-ink mobile electronic forms (Android/Java, iOS/Objective-C) syncing to EMR via web services.

• Skills: Delphi, C#, SP/T-SQL, OOA&D, Objective-C, JS/JQuery, Java, ASP.Net, Google 2FA, RESTful, Crypto, img proc.

Sr. Engineering Consultant -- Computer Task Group (Mayo), MN 3/2008 – 4/2009

• Saved ~$1M by replacing vended product with engineering scanning/barcode software in Delphi/C++ (image proc).

• Skills: C++, Delphi, Stored Procedures/SQL, OOA&D, Crypto, JIRA, image processing (Laplacian, edge detection). Manager, Server Solutions Vital Images, MN 11/2006 – 3/2008

• Fixed long standing elusive C++ defect associated with Singletons and Double Check Locking Mechanism.

• Engineered custom fiber optic driver (C) for Toshiba Medical’s 320 slice CT scanner in time for RSNA.

• Significantly reduced critical defect density through team development, mentoring, process improvement.

• Skills: Strategic planning, org psych, leadership, OOA&D, C/C++, C#.NET, XML, DICOM, ClearCase, ClearQuest.

Software Consultant -- Tiger Team, Inc. 5/1997 – 11/2006

• BAE Systems (DoD FCS): Robotic armament control and simulator training system written in C++.

• Medtronic: Embedded systems – implantable pacemaker & neurostimulator programmers (C++).

• Guidant: Embedded systems – implantable pacemaker V&V (C++) and Programmer (C++/Java).

• August Tech: Robotics control, silicon wafer visual inspection (image processing) in Windows C++.

• Lockheed Martin (FAA): Precision approach radar, HP-UX Unix (ASPARCS, MEARTS) C/C++.

• Novus Credit Services: 3-tier data mining system using Tuxedo, C/C++, Oracle, and OS/2.

• Deluxe: TCP/IP Client/server, interfacing w/ manufacturing and shipping systems, C++, Windows, OOA&D, patterns.

• Mayo Clinic: Data warehouse, web, DICOM/HL7 Server, image processing, Java, C/C++, SP/SQL (Sybase).

Education

• M.A. Industrial/Organizational Psychology, Northcentral University.

• B.A. Computer Science, Thomas Edison State University.

• A.A.S. Transportation, Community College of the Air Force

• A.A.S. Management Information Systems, Community College of the Air Force

Community

• Association for Computing Machinery – Member.

• Institute of Electrical and Electronics Engineers Computer Society– Member.

• Agile Alliance – Member.

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