About Castelion

Castelion is bringing a new approach to defense development and production: one that focuses on short, iterative design cycles, rapid testing in development, and modern commercial manufacturing strategies for production at scale. We're designing, building, and testing next generation long range strike weapons systems to give America and its Allies a definitive edge and deter future conflicts.

Graphic Design Intern - Summer 2026

Castelion is seeking a driven, curious, and highly capable Graphic Design Intern to join our Brand Studio for Summer 2026. You'll be part of an in-house design team looking to change how aerospace and defense companies visually define themselves.

You'll work alongside experienced designers, marketers, and engineers who translate complex ideas into clear, compelling visuals that reflect the precision of what we build.

What You'll Do

Design & Production:

• Create and edit visual assets across multiple channels: social media, web, presentations, event collateral, and marketing materials

• Produce high-quality deliverables in a fast-paced environment with tight timelines

• Maintain consistency across assets using Castelion's visual system and brand standards

Brand Studio Collaboration

• Work closely with the art director and graphic design team in creative brainstorming sessions for market campaigns, collateral, and internal design needs

• Help translate brand strategy into practical, scalable design outputs

Basic Qualifications

• Current Student/Recent Grad: Candidate is currently enrolled or a recent graduate of a graphic design, fine arts, or communications degree program.

• Proficiency in Design Software: Overall proficiency with the Adobe programs especially Photoshop, Illustrator, and InDesign.

• Attention to Detail: Strong time management with the ability to thrive in a fast-paced environment.

• Design Knowledge: Understanding of mid-century modern aesthetics, and current marketing trends, particularly in merchandise design.

• Communication: Ability to follow direction and incorporate feedback effectively.

• Online Portfolio: Projects should show a foundational understanding of design, layout, and branding.

Preferred Skills and Experience

• Illustration Skills: Experience creating original illustrations or custom graphics to support design projects.

• Motion & Multimedia Tools: Working knowledge or experience with Adobe After Effects, DaVinci Resolve, Autodesk Maya, or Unreal Engine for motion graphics, video editing, or 3D design.

• File Management: Strong file organization skills, including proper naming conventions, version control, and preparation of files for print or digital delivery.

• Industry Interest: Demonstrated interest in technology, aerospace and defense, with a willingness to push creative boundaries within a technical industry

Why Castelion

At Castelion, you'll be part of a mission-driven company where every project matters. Our interns don't just observe they contribute directly to critical hardware and software that supports national security. This is a unique opportunity to work at the cutting edge of defense and aerospace engineering, while building the skills and experience to grow into a future leader in the field.

What You'll Gain

• Real-world projects that demonstrate your ability to work within branding guidelines and creative direction

• Technical proficiency in Adobe Creative Suite (Photoshop, Illustrator, InDesign)

• Professional development working with client feedback, time management, and collaborating within a design team

• Industry knowledge within print production, vendor relationship, file management, and workflows.

Leadership Qualities

• Bias to Action and Creative Problem Solving.Desire and experience questioning assumptions in ways that lead to break through ideas that are ultimately implemented. Successfully bring in applicable processes/concepts/materials from other industries to achieve efficiency gains. The ability to personally resolve minor issues in development without requiring significant support.

• High Commitment, High Initiative.A successful candidate will have a genuine passion for Castelion's mission and consistently look for ways to contribute to the company's technical goals and prevent hardware blockers. Ability to work in a fast paced, autonomously driven, and demanding atmosphere. Strong sense of accountability and integrity.

• Clear Communicator.Proactively communicates blockers. Trusted in previous roles to be voice of company with regulators, suppliers, gate keepers and customers. Capable of tactfully managing relationships with stakeholders to achieve company-desired outcomes without compromising relationships. Emails, IMs and verbal interactions are logical, drive clarity, and detailed enough to eliminate ambiguity.

ITAR Requirements

• To conform to U.S. Government export regulations, the applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State.

Employment with Castelion is governed on the basis of competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.

This internship is paid at an hourly rate of $30 per hour. Compensation may vary based on experience and education level. For non-local interns, housing or relocation stipends may be available to help offset temporary living expenses.