Expert Systems Engineer at Leidos in Chantilly, VA

Enterprise System Engineer serve to maintain a strong awareness of technical trends in information technology, develop and maintain a strong awareness of on-going IT projects, and business unit requirements; be able to apply the project management model (e.g. Spiral, Waterfall, Agile) selected for a given development effort; and provide analysis, design, development, deployment, and lifecycle support for innovative hardware systems and applications. Work involves being able to develop end-to-end cost analysis for projects; ensure systems being developed comply with the enterprise technical architecture; help project and program teams prepare for CIO Project Management Program control gates; and keep senior management apprised of project or program status.

Candidate needs knowledge of Public Key Infrastructure and understand key concepts like digital certificates, Certificate Authorities (CAs), Registration Authorities (RAs), key management practices, cryptographic algorithms, certificate revocation procedures, trust models, and how to design a robust system to issue, manage, and revoke digital certificates while ensuring the integrity and authenticity of users and entities within a network.

Duties and Responsibilities:

• Develops block diagrams and logic flow charts. Translate detailed design into computer software.
• Tests, debugs, and refines the computer software to produce the required product.
• Prepare required documentation, including both program-level and user-level documentation.
• Enhance software to reduce operating time or improve efficiency.
• Provide technical direction to programmers to ensure program deadlines are met.
• Apply business process improvement practices to re-engineer methodologies and principles and business process modernization projects.
• Apply, as appropriate, activity and data modeling, transaction flow analysis, internal control and risk analysis and modern business methods and performance measurement techniques.
• Assist in establishing standards for information systems procedures.
• Develop and apply organization-wide information models for use in designing and building integrated, shared software and database management systems.
• Ensure the logical and systematic conversion of customer or product requirements into total systems solutions that acknowledge technical, schedule, and cost constraints.
• Perform functional analysis, timeline analysis, cost estimation, trade studies, requirements allocation and interface definition studies to translate customer requirements into hardware and software specifications.
• Provide staff and users with assistance solving computer related problems, such as malfunctions and program problems.
• Test, maintain, and monitor computer programs and systems, including coordinating the installation of computer programs and systems.
• Use object-oriented programming languages, as well as client/server applications development processes and multimedia and Internet technology.
• Confer with clients regarding the nature of the information processing or computation needs a computer program is to address.
• Coordinate and link the computer systems within an organization to increase compatibility and so information can be shared.
• Consult with management to ensure agreement on system principles.
• Expand or modify system to serve new purposes or improve workflow.
• Analyze and study complex system requirements.
• Design software tools and subsystems to support software reuse and domain analyses and manages their implementation.
• Manage software development and support using formal specifications, data flow diagrams, other accepted design techniques and Computer Aided Software Engineering (CASE) tools.
• Estimate software development costs and schedule. Review existing programs and assist in making refinements, reducing operating time, and improve current techniques. Supervise software configuration management.
• Apply the concept of operations set of disciplines for the planning, analysis, design and construction of information systems across a major sector of the organization.
• Develop analytical and computational techniques and methodology for problem solutions.
• Perform strategic systems planning, business information planning, business and analysis.
• Provide technical guidance in software engineering techniques and automated support tools.
• Analyze functional business applications and design specifications for functional activities.
• Designs, Configures and Maintains the Information Technology Infrastructure associated with the cloud environment.

Required Qualifications:

• Bachelor's degree and 12+ years' experience. Additional experience in lieu of degree.
• Data base user interface and query software — Database software; Microsoft Access
• MS Office Suite
• Markup language – HTML
• Experience with Metric Tools

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

October 8, 2025 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $131,300.00 - $237,350.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.