Senior UI/UX Designer

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

The Geospatial Enterprise Open Data Store (GEODS) contract provides integration, design, development, and sustainment for data services in support of the Federal Government.

Amentum is seeking a talented Senior UI/UX Designer who is responsible for leading the design strategy, execution, and optimization of digital products across federal web platforms. They will bridge the gap between business objectives, complex user needs, and engineering feasibility, transforming abstract ideas into scalable, beautiful, and intuitive user experiences. In addition to hands‑on design work, a senior designer acts as a system thinker, mentor, and strategic collaborator who drives measurable business outcomes.

Work Schedule

Day shift, Monday through Friday.

Essential Responsibilities

We are seeking a visionary and highly collaborative Senior UI/UX Designer to own the end‑to‑end user experience of our product ecosystem. In this role, you will lead the evolution of our design system, map out complex user journeys, and create high‑fidelity interfaces that look stunning and function seamlessly. You will collaborate daily with product management, software developers, and federal leadership to champion user‑centered design practices and drive product innovation. As a senior member of the team, you will also mentor junior designers and elevate our collective design standards.

Key Responsibilities

• Design Strategy & Execution: Own the full product design lifecycle, moving smoothly from discovery, user flows, and wireframing to high‑fidelity UI design and interactive prototyping.
• System & Component Design: Maintain and scale our cross‑platform design system, building robust, reusable UI component libraries that streamline frontend development.
• User Research & Data Synthesis: Plan and conduct qualitative user research, usability testing, and data analysis to uncover pain points and validate design assumptions.
• Cross‑Functional Collaboration: Partner closely with Product Managers to align features with business KPIs, and work hand‑in‑hand with Software Developers to provide precise handoff documentation and perform design QA.
• Stakeholder Influence: Articulate and present design logic, research findings, and product vision to stakeholders, effectively gathering feedback and securing organizational buy‑in.
• Designing for Reality: Optimize designs for digital accessibility (e.g., WCAG 2.1 AA and Section 508 standards), localization, edge cases, responsive scaling, and performance.

Work Environment, Physical Demands, and Mental Demands

Office environment, light physical demands, must have ability to attend to mental tasks for the duration of the workday.

Minimum Requirements (Knowledge, Skills, and Abilities)

• Experience: 4 years of dedicated UI/UX or product design experience in complex software landscapes, preferably in secure or federal environments or commercial high‑growth environments (e.g., B2B SaaS, complex mobile apps, etc.).
• Portfolio: A robust portfolio demonstrating end‑to‑end product design, clear visual design craft, systematic UI architecture, and examples of data‑informed UX decisions.
• Tools: Expert‑level mastery of industry standard UI/UX tools (e.g., Figma, Sketch, Adobe Creative Cloud, or advanced prototyping tools like Framer) and experience with Atlassian suite, specifically Jira and Confluence.
• Technical Understanding: Familiarity with frontend technologies (HTML, CSS, JavaScript frameworks) and how layout constraints, component logic, and responsive design function in development.
• Soft Skills: Outstanding communication, narrative storytelling, and project management skills; ability to juggle multiple initiatives simultaneously without losing attention to pixel‑level details.

Security Clearance Required

Active TS/SCI to start; with ability to gain and maintain a Poly

Minimum Education

Master’s degree plus 2 years experience, Bachelor’s degree plus 4 years experience, Associates degree plus 6 years experience, or a minimum of 8 years experience, in relevant field

Minimum Years of Experience

Master’s degree plus 2 years experience, Bachelor’s degree plus 4 years experience, Associates degree plus 6 years experience, or a minimum of 8 years experience, in relevant field

Preferred Qualifications

AI if applicable to your program

Other Responsibilities

Safety

Amentum enforces a safety culture whereby all employees have the responsibility for continuously developing and maintaining a safe work environment. As appropriate, each employee is responsible for completing all training requirements and fulfilling all self‑aid/buddy aid responsibilities, participating in emergency response tasks and serving on safety committees and teams.

Quality

Quality is the foundation for the management of our business and the keystone to our goal of customer satisfaction. It is our policy to consistently provide services that meet customer expectations. Accordingly, each employee must conform to the Amentum Quality Policy and carry out job activities in compliance with applicable Amentum Quality System documents and customer contracts. Each employee must read and understand his/her Quality Management and Customer Satisfaction responsibilities.

Procedure Compliance

Each employee must read, understand and implement the general and specific operational, safety, quality and environmental requirements of all plans, procedures and policies pertaining to his/her job. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status.

Compensation Details

$140k - $210k

The compensation range or hourly rate listed for this position is provided as a good‑faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.

Benefits Overview

Our health and welfare benefits are designed to support you and your priorities. Offerings include:

• Health, dental, and vision insurance
• Paid time off and holidays
• Retirement benefits (including 401(k) matching)
• Educational reimbursement
• Parental leave
• Employee stock purchase plan
• Tax‑saving options
• Disability and life insurance
• Pet insurance

Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara‑O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.

Original Posting

11/10/2026 - Until Filled

Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low‑income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.