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Mission Support and Test Services, LLC .Net Full Stack Developer (Sr App Analyst) in North Las Vegas, Nevada


Mission Support and Test Services, LLC (MSTS) manages and operates the Nevada National Security Site (NNSS) for the U.S. National Nuclear Security Administration (NNSA). Our MISSION is to help ensure the security of the United States and its allies by providing high-hazard experimentation and incident response capabilities through operations, engineering, education, field, and integration services and by acting as environmental stewards to the Site’s Cold War legacy. Our VISION is to be the user site of choice for large-scale, high-hazard, national security experimentation, with premier facilities and capabilities below ground, on the ground, and in the air. (See NNSS.gov for our unique capabilities.) Our 2,750+ professional, craft, and support employees are called upon to innovate, collaborate, and deliver on some of the more difficult nuclear security challenges facing the world today. In this environment, the best ideas need to be voiced and every opinion matters. As such, MSTS places great value on Diversity, Equity, and Inclusion and is committed to a diverse and equitable workforce, with an inclusive culture that values and celebrates the diversity of our people, talents, ideas, and perspectives.

  • MSTS offers our full-time employees highly competitive salaries and benefits packages including medical, dental, and vision; both a pension and a 401k; paid time off and 96 hours of paid holidays; relocation (if located more than 75 miles from work location); tuition assistance and reimbursement; and more.

  • MSTS is a limited liability company consisting of Honeywell International Inc. (Honeywell), Jacobs Engineering Group Inc. (Jacobs), and HII Nuclear Inc.


The Information Technology Department is looking for a .Net Full Stack Developer (Sr App Analyst) at our North Las Vegas office. The Software Engineer will be responsible for the business process analysis, design, development, implementation, and support of the applicable business applications. This position does not manage staff. The position reports to the Software Engineering Supervisor.

Key Responsibilities

  • W rite program code from internal specification documentation or outdated application code and prepare test plans, test data, run tests, observe results and correct program code to resolve any differences from specifications.

  • Perform/assist in the administration and technical responsibility of COTS and in-house developed applications including support for users, translating business requirements into enhancements; configuring and testing changes; maintaining and monitoring system security and permissions; and coordinating activities with other team members, the application owner, and IT.

  • Provide backend support of enterprise server farms that host multiple applications.

  • Identifies, reports, and performs/assists in the remediation of Cyber Security threats and vulnerabilities.

  • Provide direction to less experienced staff.

  • Lead complex projects that may involve other IT sections, other departments, and consultants.

  • Serve as liaison between IT and Business Support groups.

  • Coach or mentor less senior staff.


Due to the nature of our work, US Citizenship is required for all positions.

  • Bachelor’s degree in a computer related field or equivalent computer related experience with at least 5 years of relevant, progressively responsible experience.

  • Bachelor’s degree in MIS or Computer Science preferred.

  • Possess strong analytical and problem solving skills.

  • Possess good trouble shooting and testing skills.

  • Possess excellent customer service skills and good oral and written communication skills sufficient to communicate with co-workers, customers, write clear and concise reports, gather information, and collect information.

  • Possess good presentation skills.

  • Team player and has strong experience developing applications using these technologies.

  • Advanced knowledge of technical principles, theories, standards, practices and procedures in software development and database administration.

  • Ability to understand the features and concepts associated with object oriented programming and the Model-View-Controller architectural pattern.

  • Knowledge of SQL Server and Oracle relational databases is a must.

  • Ability to use multiple electronic devices including standard office machines, cellular phones, and security appliances.

  • Ability to understand policies, procedures, laws, regulations, and other directives, maintain strict confidentiality.

  • Ability to use a systems engineering approach when implementing new solutions or modifying existing solutions.

  • Deliver quality, maintainable solutions.

  • Have the aptitude and desire to continually learn about new tools and technology and have the ability to evaluate the best solution for stated problems.

  • Have expert experience in broad range of tools and technology used by NNSS.

  • Able to accept assigned responsibilities and manage work to ensure deadlines and milestones are met.

  • Willing to accept responsibility in new areas and possess the level of technical and analytical skills that will provide successful outcomes to those assignments.

  • Ability to solve complex design problems.

  • Ability to multi-task and maintain organization in a fast-paced, changing environment.

  • Able to understand and remediate security vulnerabilities on supporting applications.

  • Knowledge about secured application development and experience applying that to web applications.

  • Experience developing web applications, and deploying on Windows Server using IIS web server.

  • Experience using Azure DevOps, Git, Visual Studio, and Toad for Oracle.

  • Candidate will be an object-oriented, full-stack developer, preferably in ASP.NET (.NET Framework & .NET 6 or later), Blazor, MVC, C#, Javascript, HTML, CSS, APEX, and Java.

  • Ability to evaluate user requirements and write technical specifications.

  • Understand the principles associated with the MSTS safety concept. Participate in and embrace MSTS environment, safety, health, and quality initiatives.

  • Work will be conducted remotely. Some work at our Losee Road facility in North Las Vegas, Nevada is required in support of these functions.

  • Work schedule for this position will be 4/10’s, Monday – Thursday (subject to change).

  • Pre-placement physical examination, which includes a drug screen, is required. MSTS maintains a substance abuse policy that includes random drug testing.

  • Must possess a valid driver’s license.

    Ability to obtain a HSPD-12 Personal Identity Verification credential under the Department of Energy Order 206.2, ‘ Identity, Credential, and Access Management ,’ and Supplemental Directive NNSA SD 206.2, ‘ Implementation of Personal Identity Verification for Uncleared Contractors .’

    MSTS is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status or other characteristics protected by law. MSTS is a background screening, drug-free workplace.

Annual salary range for this position is:$92,892.80 - $139,339.20.

Starting salary is determined based on the position market value, the individual candidate education and experience and internal equity.

Posted Date2 months ago(1/9/2024 12:04 AM)

Job ID2023-7180

of Openings1

CategoryInformation Technology


Location : CityNorth Las Vegas

Location : State/Province (Full Name)Nevada