Title: Senior Scientist Location: Washington, DC Job Description: The Environmental Working Group (EWG), a leading 501(c)(3) environmental health research and advocacy organization, is seeking a Senior Scientist to advance EWG’s Verified programs. Since 1993, EWG has worked to shine a spotlight on policies, practices, and industry behaviors that threaten public health and the environment. Through groundbreaking research, policy advocacy, and communications, we strive to empower the public and decision-makers with the facts to drive positive change. EWG’s Verified team analyzes a wide variety of data on personal care products, cleaning products, pet grooming products, diapers, and mattresses. Through this process, we catalyze the development of safer products, leveraging our scientific independence to challenge the status quo and set new standards for public health protection. The Senior Scientist will evaluate consumer products to support EWG Verified certification and consultancy program needs for raw materials, formulations, and final products. The ideal candidate will have a demonstrated commitment to working for the public interest, a strong technical background in toxicology or related field, outstanding interpersonal, oral and written communication skills, and the ability to use the best available science to make informed decisions despite evolving or imperfect information. Responsibilities: - Lead in-depth toxicological hazard and risk evaluations for chemicals in EWG Verified products, utilizing GHS criteria, internationally recognized frameworks, read-across methodologies, predictive modeling and AI to address data gaps. - Drive scientific rigor by facilitating cross-functional workgroups of toxicologists and chemists, ensuring data and decisions are seamlessly integrated into internal systems and public-facing databases. - In collaboration with all EWG teams, propose and implement stringent public health-based standards and criteria. - Anticipate emerging impacts and remain up-to-date on new toxicology and environmental health issues relevant to EWG project areas. - Research and advise on testing methodologies for products, ingredients and contaminants. - Implement agile workflows that support organizational growth, ensuring that as the EWG Verified program demand increases or expands into new product categories, technical rigor and delivery timelines remain optimized. - Develop and maintain consumer education resources about the health effects of chemicals in consumer products. - Represent EWG in public and professional forums, including expert panels, scientific conferences, regulatory hearings, and media engagements. Qualifications and experience: - Master’s or PhD degree in Toxicology, Chemistry, Biology, Epidemiology, Environmental Health or a related Science field. Comparable training and/or experience can be substituted for degrees when appropriate. - Minimum 5 years’ related professional work experience in toxicology, chemical risk assessment, environmental health, public health, green chemistry or related field. - Knowledge of chemical regulations/regulatory toxicology-related compliance with global and national safety regulations. - Ability to prioritize and manage multiple projects. - Ability to explain and present complex scientific and regulatory compliance issues and solutions to diverse audiences. - The position requires ability to work in a fast-paced setting, efficiency with transitioning to new projects and commitment to the mission of the organization. - May spend extended periods working at a computer. Location: Washington, DC office. Compensation: Annual salary range of $80,000 – $148,000. Salary is commensurate with experience. Total Rewards In addition to competitive pay, EWG employees enjoy a robust total rewards package that includes: - Affordable, comprehensive health care that includes medical, dental and vision benefits. - Generous paid annual leave plan. - Generous paid sick leave. - Employer-paid disability, life insurance and paid family leave plans. - Flexibility to telework. EWG’s commitment to diversity and inclusion: EWG celebrates diversity and is committed to creating an inclusive environment for all employees. We are proud to foster a work environment that supports, inspires and respects all individuals. EWG does not discriminate against any employee or applicant on the basis of race, color, religion, national origin, age, sex, citizenship, ancestry, marital status, family responsibilities, physical or mental disability, military or veteran status, medical condition, genetic information, sexual orientation, gender, gender identity or expression, matriculation or political affiliation, or any other protected class recognized in any of the jurisdictions where EWG has offices or employees working. We adhere to these principles in all aspects of employment, including recruitment, hiring, training, and compensation and promotion.

Title: Date Scientist II Location: TX-San Antonio Job Description: Battelle delivers when others can’t. We conduct research and development, manage national laboratories, design and manufacture products and deliver critical services for our clients—whether they are a multi-national corporation, a small start-up or a government agency. We recognize and appreciate the value and contributions of individuals from a wide range of backgrounds and experiences and welcome all qualified individuals to apply. Job Summary As a Data Scientist II, you will be joining a dynamic team performing cutting edge research across multiple disciplines. Operating in a collaborative environment, you will provide invaluable support to a large government contract. This position offers an exhilarating opportunity to collaborate with a dynamic, multidisciplinary team committed to advancing scientific knowledge and solving our customer’s toughest challenges. This full-time position is contingent upon contract award and will be located in San Antonio, TX. Responsibilities - Design and implement data acquisition systems for test environments, enabling real-time collection, processing, and analysis of technical and operational data from bioanalytics, microbiology, materials and chemistry, human factors, systems engineering, and data science activities. - Develop and maintain robust data pipelines that support the ingestion, transformation, and storage of test data from diverse instrumentation sources, ensuring high data integrity and traceability throughout the test lifecycle. - Collaborate with systems engineers and test specialists to define data requirements, integrate instrumentation outputs, and optimize data flows for real-time monitoring and post-test analysis. - Implement real-time data processing solutions to support rapid assessment of system performance, technical maturity, and operational readiness during test events. - Support the creation of technical analysis reports and comparative matrices by integrating real-time and post-test data from instrumentation, modeling, and simulation outputs. - Prepare and deliver comprehensive data packages, analysis summaries, and supporting documentation for technical reviews, risk assessments, and operational recommendations - Assist in preparing technical data tables, figures, and interpretations for reports and presentations, peer reviewed publications, and client meetings - Interact professionally with internal and external clients, leadership, and team members - Some domestic travel is possible but not anticipated. Key Qualifications - Education reflecting one of the following: - Master's degree with 5+ years of experience, or Ph.D. with 0-2 years of experience in Physics, Physics engineering, Mathematics, Biology, Chemistry, Statistics, or Engineering with a minor, certificate, or emphasis in computer science, data science, bioinformatics and relevant work experience requiring computer programming. - Demonstrated proficiencies in computer programming and statical analysis (e.g., Python, R, SPSS). - At least one year of experience with task leadership and proven ability to meet project deadlines on schedule and in budget. - Ability to learn and understand new programing languages and mathematical concepts. - Good oral and written communication skills - Self-motivated and able to work in a fast-paced environment with competing priorities. - Ability to work in a team environment - Sole U.S. citizenship, with the ability to obtain and maintain required government security clearances as a condition of employment Preferred Qualifications 3 to 8 years of experience in modeling & simulation, statistical analysis, quantitative risk assessment, data science, or related field. Knowledge of advanced statistics and/or probability. Experience in modeling & simulation on a government program. Benefits: Live an Extraordinary Life We care about your well-being, not just on the job. Battelle offers comprehensive and competitive benefits to help you live your best life. - Balance life through a compressed work schedule: Most of our team follows a flexible, compressed work schedule that allows for every other Friday off—giving you a dedicated day to accomplish things in your personal life without using vacation time. - Enjoy enhanced work flexibility, including a hybrid arrangement: You have options for where and when you work. Our Together with Flexibility model allows you to work 60% in-office and 40% remote, with Monday and Tuesday as common in-office days, dependent on team and position needs. - Take time to recharge: You get paid time off to support work-life balance and keep motivated. - Prioritize wellness: Stay healthy with medical, dental, and vision coverage with wellness incentives and benefits plus a variety of optional supplemental benefits. - Better together: Coverage for partners, gender-affirming care and health support, and family formation support. - Build your financial future: Build financial stability with an industry-leading 401(k) retirement savings plan. For most employees, we put in 5 percent whether you contribute or not, and match your contributions on top of that. - Advance your education: Tuition assistance is available to pursue higher education. A Work Environment Where You Succeed For brilliant minds in science, technology, engineering and business operations, Battelle is the place to do the greatest good by solving humanity’s most pressing challenges and creating a safer, healthier and more secure world. You will have the opportunity to thrive in a culture that inspires you to: - Apply your talent to challenging and meaningful projects - Receive select funding to pursue ideas in scientific and technological discovery - Partner with world-class experts in a collaborative environment - Nurture and develop the next generation of scientific leaders - Give back to and improve our communities Vaccinations & Safety Protocols Battelle may require employees, based on job duties, work location, and/or its clients’ requirements to follow certain safety protocols and to be vaccinated against a variety of viruses, bacteria, and diseases as a condition of employment and continued employment and to provide documentation that they are fully vaccinated. If applicable, Battelle will provide reasonable accommodations based on a qualified disability or medical condition through the Americans with Disabilities Act or the Rehabilitation Act or for a sincerely held religious belief under Title VII of the Civil Rights Act of 1964 (and related state laws). Battelle is an equal opportunity employer. We provide employment and opportunities for advancement, compensation, training, and growth according to individual merit, without regard to race, color, religion, sex (including pregnancy), national origin, sexual orientation, gender identity or expression, marital status, age, genetic information, disability, veteran-status veteran or military status, or any other characteristic protected under applicable Federal, state, or local law. Our goal is for each staff member to have the opportunity to grow to the limits of their abilities and to achieve personal and organizational objectives. We will support positive programs for equal treatment of all staff and full utilization of all qualified employees at all levels within Battelle. The above statements are intended to describe the nature and level of work being performed by people assigned to this job. They are not intended to be an exhaustive list of all responsibilities, activities and skills required of staff members. No statement herein is intended to imply any authorities to commit Battelle unless special written permission is granted by Battelle's Legal Department.

• Lead the measurement strategy for user safety by defining metrics, frameworks, and dashboards that quantify and monitor safety experiences across Reddit. • Use data and science-backed methods to inform the strategic direction of Safety product development and to rigorously assess the impact of product launches and policy or enforcement changes. • Design and execute experiments and quasi-experimental / inferential causal analyses (e.g., difference-in-differences, synthetic controls, matching) to estimate the impact and ROI of safety initiatives, and use these results for opportunity sizing and prioritization. • Own the design, development, and maintenance of scalable models and prototypes leveraging statistical, machine learning, or GenAI methodologies to improve Reddit safety. • Tactically support product development and go-to-market, from problem framing and exploratory analysis through to experimentation, launch evaluation, and post-launch monitoring. • Stay current on advances in ML, LLMs, and related methods, and evaluate where they can meaningfully improve abuse detection, risk identification, and enforcement workflows. • Translate complex analyses into clear narratives and recommendations for stakeholders, acting as a data storyteller who can influence decisions at all levels of the Safety and Moderation orgs. • Mentor and up-level junior Data Scientists and Analysts in technical approaches for detecting and mitigating abuse, fostering a culture of rigor and curiosity.

• Lead the design, development, and deployment of scalable machine learning solutions focused on pricing optimization, demand forecasting, and promotion planning. • Build and improve statistical and machine learning models for: - Demand forecasting - Price elasticity modeling - Promotion optimization - Inventory and revenue forecasting • Design, build and deploy robust ML pipelines in Databricks, build model monitoring systems, and production-ready APIs. • Ability to design and evaluate transformer-based time series forecasting models for large-scale retail sales forecasting and demand planning. • Drive experimentation, model evaluation, and continuous improvement of forecasting and pricing models. • Analyze large-scale structured and unstructured retail datasets to uncover trends, customer behavior patterns, and pricing insights. • Develop data-driven strategies that help maximize revenue, profitability, and pricing efficiency across products and categories. • Apply advanced statistical techniques and machine learning algorithms to solve complex retail business problems. • Collaborate closely with Product, Engineering, Data Engineering, and Business teams to translate business requirements into scalable ML solutions. • Mentor junior data scientists and provide technical guidance across cross-functional teams. • Communicate analytical findings and business recommendations clearly to both technical and non-technical stakeholders.