Role:SustainabilityAssessment Reviewer - Intern

Location:Remote or Hybrid, based out of Pittsburgh, PA

Contract:Full time, Internship –mid-May through mid-August,2026

Remuneration:$26/hr.+ potentialfor 10% bonus upon internship completion

Internship Summary

This internship program provides the framework for a student to apply what has been learned from prior experience and the classroom to make a value-added impact on 3R and its clients.This is not a consulting internship but is instead ahands-on,assessment reviewopportunitywithin 3R’s Sustainability Assurance Services (SAS) division. SAS wasestablishedtomeetthe growing need for third-partyvalidation of sustainability-related data and reporting. Through thisinternship, internswill gainreal-world work experience and demonstrable accomplishments, whileacquiringa deep understanding of various sustainability-relatedstandards and frameworks. The skills developed during this internship willform the foundation forpositionsincluding but not limited to thoserelated tosustainability consulting,ESG/sustainability auditsand controls,corporateESG/sustainability policy writing,green building design/performance,and sustainablereal estate/investment.

Candidatesmust beavailable to work40 hoursper week for the duration of the internship.3R will provide all required training and software resources. For remote/hybrid interns, you mustpossessa fully functioning, current, secure laptop for working virtually.

Key Responsibilities

Perform in-depth technical reviews of environmental, social, and governance (ESG) performance documents for analysis and benchmarking

Verify policies, reports, and data for multiple ESG categories compared to international sustainability standards

Gain familiarity with several international sustainability rating systems/assessments (LEED, GRI, ISO, GRESB, etc.)

Work with confidential client information

Work diligently in a fast-paced environment

Manage time across various tasks to meet deadlines

Work collaboratively with other interns and 3R employees, as well as independently

Engage in designated customer-facing activities and communications

The Ideal Candidate is:

A graduate student interested in a career in sustainability, studying sustainable business practices, environmentalstudies/sciences/engineering, chemical/biological sciences, policy writing, or a related field

Self-motivated and able to complete tasks efficiently and on time while working remotely

An effective communicator- able to work with the 3R team and project team leaders to evaluate project data against broad ESG benchmarks, scorecards, and best practices

Competent in analyzing operational and environmental data for compliance, indicators, and trends

Able to perform detail-oriented reviews of lengthy documents, providing clear, concise notes when needed

Proficient with Google and Microsoft Office Suite

Strong at problem-solving, decision making, time management, organization, and written and verbal communication skills

Team-focused,demonstratesinitiative, and has a positive, helpful attitude

A quick learner, adaptive, and eager to tackle new situations

Has a passion for sustainability and the underlying engineering, business, and policy impacts, roles, criteria, and technology

Willing to jump in on any task that helps the team meet its objectives

Estimated Project Timeline:

Interviews will begin inDecember/January and offers will be made through March or until all positions are filled.

Technical Training (40 hours) will beheldmid-May. Interns are paid for training time, and all internsare required toparticipate.

Project workis conducted the week after the technical training through mid-August (40 hoursper week, Monday to Friday)

All interns thatsuccessfullycomplete the fullprogramwillbeeligiblereceive a 10% bonus

Top performers may be offered the opportunity to extend their time with 3R.

Please note that the duration of this internship will happen remotely. Thereisan optionto come into the office if you are local toPittsburgh for those who may want to experience working in an office setting, either on a regular basis or occasionally throughout the summer.

Allinterns must be located within the contiguous US for the duration of the internship.Due to the remote nature of the internship, there is a degree of flexibility to accommodate time zone differences,butmost work will take place from9am-5pm EDT.

The 3R Difference

Make a Difference Every Day –Business plays a critical role in sustainable development, which is why 3R is proud of its Women-Owned Business and B Corp Certifications. Externally, the 3R Team partners with clients to develop their ESG strategy, implement their plan, and achieve results which aregood for: business, the environment, society, and the economy.

3R Sustainability works at the intersection of ESG, carbon reduction, building performance, and reporting. Our vision is to be the partner of choice to help organizations realize the value of sustainability and create a world in which our team members and clients’ employees live and work in an environment that is mutually beneficial for people, the planet, our partners, and profit, now and for generations to come.

Our culture makes us unique. We value continual improvement, integrity, teamwork, and transparency both internally and externally- and it shows in our long-term partnerships with clients andgrowingemployee base. We prioritize learning and development and work to help each employee reach their full potential, including you.

Please consider applying if you have 75% of the requirements – we can help you develop the other skills. We strongly encourage people of historically underrepresented groups to apply.

Note:All candidates of 3R (if offered a role with 3R) will be subject to a background check. Any convictions will be evaluated to determine if they directly relate to the responsibilities and requirements of the position.Having a conviction history will not automatically disqualify an applicant from being considered for employment.

3R is a Certified Woman-Owned Business,anda certified Benefit Corporation.

3R is a member organization of the US Green Building Council and the Green Building Alliance of Western PA, Detroit 2030 District,andCEOs forSustainability..3R is also an accredited CDP Solutions Provider, anEcoVadisTraining Partner, a signatory of the UN Global Compactand a member of the Green Sports Alliance.

3R Sustainability jobs

2026 Summer Sustainability Internship