Top 402 Apl Jobs | SimplyHired

Senior Ontologist
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $100,000 - $245,000 a year
- Full-time
- Computer Science
- Master's degree
- Analysis skills
- Disability insurance
- Health insurance
Ontologist
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $100,000 - $245,000 a year
- Full-time
- Computer Science
- Mid-level
- Analysis skills
- Disability insurance
- Health insurance
Senior Ontologist (TS/SCI cleared)
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $105,000 - $290,000 a year
- Full-time
- Computer Science
- Master's degree
- Analysis skills
- Disability insurance
- Health insurance
Ceramics Researcher
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $85,000 - $195,000 a year
- Full-time
- Bachelor of Science
- Mid-level
- Bachelor's degree
- Disability insurance
- Health insurance
Ontologist (TS/SCI cleared)
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $100,000 - $245,000 a year
- Full-time
- Computer Science
- Mid-level
- Analysis skills
- Disability insurance
- Health insurance
Senior Specialist, Applications Development - Remote
APL Logistics —Scottsdale, AZ
- Full-time
- Remote
- Senior level
Senior Chemist
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $105,000 - $290,000 a year
- Full-time
- Management
- Doctor of Philosophy
- Mentoring
- Disability insurance
- Health insurance
Synthetic Chemist
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $85,000 - $195,000 a year
- Full-time
- Bachelor of Science
- Mid-level
- Bachelor's degree
- Disability insurance
- Health insurance
Advisor, Applications Development (D365) - Remote
APL Logistics —Scottsdale, AZ
- Full-time
- Remote
- Senior level
Geophysicist/Geodesist
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $100,000 - $245,000 a year
- Full-time
- Analysis skills
- Math
- Doctor of Philosophy
- Disability insurance
- Health insurance
Aerodynamic Engineer
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $100,000 - $245,000 a year
- Full-time
- 5 years
- Bachelor of Science
- Doctor of Philosophy
- Disability insurance
- Health insurance
2026 PhD Graduate - Post-Doctoral Fellow - 2D Electronic Materials and Devices
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $85,300 - $155,500 a year
- Full-time
- Doctor of Philosophy
- Mentoring
- Senior level
- Disability insurance
- Health insurance
Cryogenics Engineer
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $100,000 - $245,000 a year
- Full-time
- Mid-level
- 1 year
- Disability insurance
- Health insurance
2026 PhD Graduate - Machine Learning and Artificial Intelligence
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $105,000 - $245,000 a year
- Full-time
- Computer Science
- Math
- Doctor of Philosophy
- Disability insurance
- Health insurance
Optics Engineer
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $100,000 - $245,000 a year
- Full-time
- 5 years
- Bachelor of Science
- Doctor of Philosophy
- Disability insurance
- Health insurance
Sensor and Detector Design Engineer
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $100,000 - $245,000 a year
- Full-time
- Mid-level
- Master's degree
- Analysis skills
- Disability insurance
- Health insurance
Control Systems Engineer
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $100,000 - $245,000 a year
- Full-time
- 5 years
- System design
- Analysis skills
- Disability insurance
- Health insurance
Specialist, Tax - Remote
APL Logistics —Scottsdale, AZ
- Full-time
- Remote
- Mid-level
4d
Trajectory Optimization Engineer
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $100,000 - $245,000 a year
- Full-time
- Mid-level
- Math
- Doctor of Philosophy
- Disability insurance
- Health insurance
Robotics Researcher
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $85,000 - $195,000 a year
- Full-time
- Computer Science
- Mid-level
- Math
- Disability insurance
- Health insurance

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Senior Ontologist

Johns Hopkins Applied Physics Laboratory (APL) -
Laurel, MD

Apply Now

Job Details

Full-time
$100,000 - $245,000 a year

Benefits

Disability insurance
Health insurance
Dental insurance
Flexible spending account
Paid time off
Vision insurance
Life insurance
Retirement plan

Qualifications

Master's degree
Python

Full Job Description

Description

Are you passionate about building solutions for our greatest national security challenges?

Are you searching for engaging work with an employer that prioritizes impact, innovation, and personal development?

Do you value working in a creative and collaborative environment?

If so, we're looking for someone like you to join our team at APL.

The Threat Analytic Systems (QAI) Group wants talented staff who can work as part of a team to provide our nation with ground-breaking capabilities that bridge the gaps between data, real-world events and people, and prediction of events of national importance. We need talented engineers, scientists, and ontologists with curiosity and a drive for learning!

As a member of our team…

You will work on a team with software engineers and data scientists to build ontologies and capabilities for applied national security mission needs.
You will provide expert evaluation and review of ontology content.
You will engage stakeholders to determine ontology requirements.
You will work with subject matter experts to craft ontology content.
You will contribute to and implement quality assurance and validation practices.

Qualifications

You’ll meet our minimum requirements if you…

Have a Master's degree in a field relevant to Ontology. Relevant degree fields may include Philosophy, Computer Science, Cognitive Science, Public / Social Policy, Mathematics, Logic, or Linguistics.
Are proficient with any of the following: Ontology Web Language (OWL), Resource Description Framework Schema (RDFs), and Resource Description Framework (RDF)
Are proficient with SPARQL
Have experience building domain ontologies based on a top-level ontology
Are able to weigh tradeoffs between semantic expressivity and project-specific implementation strategies
Have experience with Python
Are familiar with ontology editors (e.g., TopBraid Composer, Protégé, ROBOT), or ontology editing software packages (e.g. rdflib, Apache Jena, Sesame, RDF4J)
Have experience with formal representations of logical reasoning and inference
Can work with loosely defined or high-level requirements
Can work on multiple dynamic projects to support evolving national security requirements
Have strong problem solving, analytical, and organizational skills
Have demonstrated initiative
Have experience working successfully independently or within a team environment
Have excellent written and verbal communication skills
Have the ability to obtain a TS/SCI level security clearance. If selected, you will be subject to a government security clearance investigation and must meet the requirements for access to classified information. Eligibility requirements include U.S. citizenship.

You’ll go above and beyond our minimum requirements if you have…

A PhD in a field relevant to Ontology. Relevant degree fields may include Philosophy, Computer Science, Cognitive Science, Public / Social Policy, Mathematics, Logic, or Linguistics
Experience working with a software engineering team to deliver ontology-driven software features
Experience with any of the following: Basic Formal Ontology (BFO); The Common Core Ontologies (CCO); W3C standards such as SOSA/SSN and the Time Ontology; ontologies in the Open Biological and Biomedical (OBO) Foundry; as well as other semantic web standards, such as Dublin Core, SKOS, QUDT, and GeoSPARQL
Experience with triple stores or graph databases (e.g., GraphDB, Stardog, Jena Fuseki)
Experience using AI tools to generate high quality ontology content
Experience developing AI tools that use ontologies or knowledge graphs
Experience with semantic validation languages (e.g. SHACL, SPIN)
Experience with software version management using GIT
Experience with machine learning, natural language processing, or in the normalization/integration of heterogeneous data sources
Coursework in data structures, databases, metaphysics, knowledge representation, algorithms, mathematical logic, mereotopology, or software programming
Experience with project management and/or leading technical teams

About Us

Why Work at APL?

The Johns Hopkins University Applied Physics Laboratory (APL) brings world-class expertise to our nation’s most critical defense, security, space and science challenges. While we are dedicated to solving complex challenges and pioneering new technologies, what makes us truly outstanding is our culture. We offer a vibrant, welcoming atmosphere where you can bring your authentic self to work, continue to grow, and build strong connections with inspiring teammates.

At APL, we celebrate our differences of perspectives and encourage creativity and bold, new ideas. Our employees enjoy generous benefits, including a robust education assistance program, unparalleled retirement contributions, and a healthy work/life balance. APL’s campus is located in the Baltimore-Washington metro area. Learn more about our career opportunities at https://www.jhuapl.edu/careers.

All qualified applicants will receive consideration for employment without regard to race, creed, color, religion, sex, gender identity or expression, sexual orientation, national origin, age, physical or mental disability, genetic information, veteran status, occupation, marital or familial status, political opinion, personal appearance, or any other characteristic protected by applicable law. APL is committed to providing reasonable accommodation to individuals of all abilities, including those with disabilities. If you require a reasonable accommodation to participate in any part of the hiring process, please contact [email protected].

The referenced pay range is based on JHU APL’s good faith belief at the time of posting. Actual compensation may vary based on factors such as geographic location, work experience, market conditions, education/training and skill level with consideration for internal parity. For salaried employees scheduled to work less than 40 hours per week, annual salary will be prorated based on the number of hours worked. APL may offer bonuses or other forms of compensation per internal policy and/or contractual designation. Additional compensation may be provided in the form of a sign-on bonus, relocation benefits, locality allowance or discretionary payments for exceptional performance. APL provides eligible staff with a comprehensive benefits package including retirement plans, paid time off, medical, dental, vision, life insurance, short-term disability, long-term disability, flexible spending accounts, education assistance, and training and development. Applications are accepted on a rolling basis.

Minimum Rate

$100,000 Annually

Maximum Rate

$245,000 Annually

Apply Now

Refine Your Search

Apl jobs

Senior Ontologist

Ontologist

Senior Ontologist (TS/SCI cleared)

Ceramics Researcher

Ontologist (TS/SCI cleared)

Senior Specialist, Applications Development - Remote

Senior Chemist

Synthetic Chemist

Advisor, Applications Development (D365) - Remote

Geophysicist/Geodesist

Aerodynamic Engineer

2026 PhD Graduate - Post-Doctoral Fellow - 2D Electronic Materials and Devices

Cryogenics Engineer

2026 PhD Graduate - Machine Learning and Artificial Intelligence

Optics Engineer

Sensor and Detector Design Engineer

Control Systems Engineer

Specialist, Tax - Remote

Trajectory Optimization Engineer

Robotics Researcher

I want to receive the latest job alert for Apl

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