Materials Laboratory Intern

Sanders Industries Holdings•Long Beach, CA

About The Position

Rubbercraft is seeking a Materials (Rubber) Laboratory Intern who is a student, or a recent graduate undergoing on-the-job supervised training in preparation of a desired career. This internship provides hands-on experience in material science, quality control, and product development, with exposure to industry-standard testing equipment, regulatory requirements, and lab practices. The Summer 2026 internship program will begin June 1st and run approximately 12–16 weeks, with anticipated end dates between August 28th and September 18th depending on availability. Interns will work 20–30 hours per week (minimum 20, maximum 30), Monday through Friday, with flexible scheduling.

Requirements

Materials Science, Polymer Engineering, Chemical Engineering, Chemistry, or a related field.
0-2 years of relevant work experience that will allow successful performance of job expectations
Strong attention to detail, good organizational skills and the ability to prioritize changing situations
Basic understanding of laboratory procedures and safety protocols
Ability to follow technical instructions and work independently
Good interpersonal, written and verbal communication skills to drive tasks to completion
Working knowledge of Microsoft Office
This position requires the use of information which is subject to the International Traffic in Arms Regulations (ITAR). All applicants must be U.S. persons within the meaning of ITAR. ITAR defines a U.S. person as a U.S. Citizen, U.S. Permanent Resident (i.e. 'Green Card Holder'), Political Asylee, or Refugee.

Nice To Haves

Basic understanding of polymers, elastomers, or rubber materials is preferred.

Responsibilities

Assist with preparation and testing of rubber samples following established procedures and ASTM/ISO standards.
Operate and maintain lab equipment
Provides support to an assigned functional area
Perform data entry and basic statistical analysis.
Maintain laboratory equipment, cleanliness, and safety protocols.
Collaborate with engineers, chemists, and technicians to troubleshoot material performance issues.
Learn and support compliance testing related to REACH, RoHS, TSCA, PFAS, Proposition 65, etc. requirements, including sample tracking and data collection.
Other responsibilities as assigned