Post Doctoral Researcher - Multimodal Knowledge Extraction and Reasoning

Exxon Mobil; Spring (TX); On-site; USD 65,000 - 90,000; Full time

Job summary

ExxonMobil is seeking a Postdoctoral Researcher in Spring, TX, to advance multimodal knowledge extraction and reasoning. You will develop AI methods to fuse text, images, video, and data sources for decision support in engineering contexts.

The role targets recent PhD graduates with expertise in multimodal ML, knowledge representation, and reasoning systems, collaborating across teams to build scalable AI systems.

Qualifications

• PhD in Computer Science, AI, ML or related field required.
• Demonstrated research in multimodal ML or knowledge-based AI.
• Experience with transformers and foundation models.
• Strong programming in Python; experience with ML frameworks.

Responsibilities

• Develop methods for multimodal data fusion and representation learning across text, visual, spatial, and temporal data.
• Design models for knowledge extraction from unstructured and semi-structured data.
• Build neural and symbolic or hybrid reasoning systems.
• Develop LLM- and multimodal foundation models for knowledge understanding and reasoning.
• Construct and use knowledge graphs for decision support.
• Enable context-aware inference using heterogeneous data sources.
• Evaluate models for accuracy, robustness, and explainability.
• Collaborate with domain experts to translate knowledge into decision-support tools.
• Implement scalable ML pipelines and data engineering best practices.
• Communicate findings through reports and publications.

Skills

Multimodal learning

Knowledge graphs

Information extraction

Reasoning systems

Python

PyTorch

TensorFlow

JAX

Transformers

Communication

Education

PhD in Computer Science / AI / ML or related field

Tools

PyTorch

TensorFlow

JAX

Job description

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Post Doctoral Researcher - Multimodal Knowledge Extraction and Reasoning

Location: Spring, TX, US, 77389

Company Name: ExxonMobil

About us

At ExxonMobil, our vision is to lead in energy innovations that advance modern living while reducing emissions. As one of the world’s largest publicly traded energy and chemical companies, we are powered by a unique and diverse workforce fueled by the pride in what we do and what we stand for.

The success of our Upstream, Product Solutions and Low Carbon Solutions businesses is the result of the talent, curiosity and drive of our people. They bring solutions every day to optimize our strategy in energy, chemicals, lubricants and lower-emissions technologies.

We invite you to bring your ideas to ExxonMobil to help create sustainable solutions that improve quality of life and meet society’s evolving needs. Learn more about our What and our Why and how we can work together.

About the Role

ExxonMobil is seeking a highly motivated Postdoctoral Researcher specializing in multimodal knowledge extraction and reasoning. The successful candidate will develop advanced AI methods to extract, integrate, and reason over information from diverse data sources—including text, images, video, time series, and structured data—to support critical business and engineering decisions.

This role is ideal for a recent PhD graduate with expertise in multimodal machine learning, knowledge representation, and reasoning systems. The candidate will work in a collaborative environment to build next-generation AI systems that transform complex, heterogeneous data into actionable insights.

Key Responsibilities

• Develop methods for multimodal data fusion and representation learning across text, visual, spatial, and temporal data.
• Design models for knowledge extraction, including entity recognition, relation extraction, and structured information generation from unstructured and semi-structured data.
• Build reasoning systems that combine neural methods with symbolic or knowledge-based approaches.
• Develop and apply large language model (LLM)-based and multimodal foundation models for knowledge understanding and reasoning.
• Construct and utilize knowledge graphs and structured representations for enhanced reasoning and decision support.
• Enable context-aware inference and decision-making using heterogeneous data sources.
• Evaluate models for accuracy, robustness, and reasoning capability, including explainability where relevant.
• Collaborate with domain experts to translate extracted knowledge into decision-support workflows.
• Implement scalable pipelines using modern ML frameworks and data engineering best practices.
• Communicate findings through technical reports, journal publications, and conference presentations.

Example Research Areas

• Multimodal machine learning and cross-modal representation learning
• Knowledge extraction from text, images, and sensor data
• Knowledge graphs and graph-based reasoning
• Neural-symbolic AI and hybrid reasoning systems
• Large language models and multimodal foundation models
• Information retrieval, semantic search, and question answering
• Temporal and causal reasoning in complex systems
• Applications to engineering, scientific, and industrial data environments

Required Qualifications

• PhD in Computer Science, Artificial Intelligence, Machine Learning, or a closely related field, with a focus on multimodal learning, knowledge extraction, or reasoning.
• Demonstrated research experience in multimodal machine learning and/or knowledge-based AI, including one or more of:
• Multimodal representation learning
• Information extraction or natural language understanding
• Knowledge graphs or structured representations
• Reasoning systems (neural, symbolic, or hybrid)
• Experience with modern deep learning architectures, including transformers and foundation models.
• Strong programming skills in Python.
• Hands-on experience with machine learning frameworks such as PyTorch, TensorFlow, or JAX.
• Experience working with heterogeneous datasets (text, images, structured data, etc.).
• Strong analytical, problem-solving, and communication skills.
• Ability to work effectively in multidisciplinary teams.

Preferred Qualifications

• Experience with multimodal foundation models or large language models (LLMs).
• Familiarity with knowledge graph construction, querying, and reasoning frameworks.
• Experience with retrieval-augmented generation (RAG) or hybrid search systems.
• Background in probabilistic reasoning, causal inference, or uncertainty-aware AI.
• Experience with scalable data pipelines and distributed ML systems.
• Experience applying AI methods to scientific, engineering, or industrial datasets.
• Strong publication record in multimodal AI, NLP, or knowledge-based systems.
• Demonstrated ability to translate research into practical decision-support tools.

Duration

This opportunity is for a postdoctoral position expected to last one to three years, subject to annual review and renewal.

Work Location

Our post doctoral research employees are located at our main corporate office in Spring, Texas.

Your Total Rewards

An ExxonMobil career is one designed to last. Our commitment to you runs deep: our employees grow personally and professionally, with benefits built on our core categories of health, security, finance, and life. Individual pay is determined based on various factors including degree/education, discipline, year of study, skills, abilities, qualifications, and work experience.

Please note pay rates and benefits may be changed from time to time without notice, subject to applicable law.

Relocation Options

Relocation benefits may be available to you based on ExxonMobil eligibility guidelines.

Equal Opportunity Employer

ExxonMobil is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, age, sexual orientation, gender identity, national origin, citizenship status, protected veteran status, genetic information, or physical or mental disability.

Nothing herein is intended to override the corporate separateness of local entities. Working relationships discussed herein do not necessarily represent a reporting connection, but may reflect a functional guidance, stewardship, or service relationship.

Exxon Mobil Corporation has numerous affiliates, many with names that include ExxonMobil, Exxon, Esso and Mobil. For convenience and simplicity, those terms and terms like corporation, company, our, we and its are sometimes used as abbreviated references to specific affiliates or affiliate groups. Abbreviated references describing global or regional operational organizations and global or regional business lines are also sometimes used for convenience and simplicity. Similarly, ExxonMobil has business relationships with thousands of customers, suppliers, governments, and others. For convenience and simplicity, words like venture, joint venture, partnership, co-venturer, and partner are used to indicate business relationships involving common activities and interests, and those words may not indicate precise legal relationships.

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