Senior UI/UX Designer - Federal Systems & Design Lead

Amentum; Arlington (VA); On-site; USD 140,000 - 210,000; Full time

Job summary

Amentum is seeking a Senior UI/UX Designer to lead design strategy across federal web platforms. You will own the end‑to‑end user experience, evolve the design system, and collaborate with product, engineering, and leadership to deliver accessible, data‑driven interfaces that meet complex user needs.

You will mentor junior designers, drive design standards, and advocate for user‑centered practices while aligning with business KPIs.

Qualifications

• Minimum 4 years of UI/UX or product design experience in complex software environments, preferably federal or secure.
• Robust portfolio demonstrating end‑to‑end product design and data informed UX decisions.
• Expert‑level mastery of UI/UX tools (Figma, Sketch, Adobe CC) and Atlassian Jira/Confluence.

Responsibilities

• Own end‑to‑end product design lifecycle from discovery to high‑fidelity UI and prototyping.
• Maintain and scale a cross‑platform design system with reusable UI components.
• Plan and conduct qualitative user research, usability tests, and data analysis.
• Partner with Product Managers to align features with KPIs; hand off to Developers with clear QA.
• Present design rationale and research findings to stakeholders to gain buy‑in.
• Design for accessibility (WCAG 2.1 AA, Section 508), localization, responsive behavior.

Skills

Communication

Storytelling

Project management

Education

Master’s degree + 2 years

Bachelor’s degree + 4 years

Associates degree + 6 years

8 years experience in field

Tools

Figma

Sketch

Adobe Creative Cloud

Framer

Jira

Confluence

Job description

Amentum is seeking a Senior UI/UX Designer to lead design strategy across federal web platforms. You will own the end‑to‑end user experience, evolve the design system, and collaborate with product, engineering, and leadership to deliver accessible, data‑driven interfaces that meet complex user needs.

You will mentor junior designers, drive design standards, and advocate for user‑centered practices while aligning with business KPIs.