4,221 Results for

Systems Engineer Jobs in Columbia, MD

Jobs

New!

Columbia, MD4 days ago

$110,000–$165,000 Per Year

With deep expertise in cloud-first architectures, automation, DevSecOps, virtualization, reliability engineering, and large-scale systems integration, we help organizations modernize infrastructure, improve operational efficiency, and support mission-critical environments where performance, security, and resiliency are essential. Our teams partner closely with customers to deliver innovative solutions across cloud strategy, cybersecurity, systems integration, data engineering, machine learning, AI, disaster recovery, and enterprise infrastructure initiatives.

New!

Falls Church, VA2 days ago

Every day, our team members do amazing things in pursuit of our shared purpose to build trust with our clients, partners, subcontractors, and teammates. Proficiency in Microsoft Azure services, including deployment, configuration, administration, and monitoring of cloud-based solutions.

New!

Arlington, VA4 days ago

$150,000–$200,000 Per Year

With deep expertise in cloud-first architectures, automation, DevSecOps, virtualization, reliability engineering, and large-scale systems integration, we help organizations modernize infrastructure, improve operational efficiency, and support mission-critical environments where performance, security, and resiliency are essential. We work closely with stakeholders at every level of the organization—from executive leadership to engineering and operations teams—to provide scalable, resilient, and secure technology solutions that solve complex business and operational challenges.

New!

Fort Meade, MD4 days ago

$130,000–$180,000 Per Year

With a global customer base including all sectors, from Fortune 500 to up-and-coming startups, we over diverse product lines including, but not limited to, Cloud Services, Artificial Intelligence, Storage, Networking, Supercomputing, and Digital Transformation offerings. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.

New!

Washington, DC4 days ago

Remote

$100,000–$165,000 Per Year

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. We are seeking a highly skilled System Integration & Test Engineer to support a large-scale FAA Air Traffic Control modernization initiative focused on next-generation aviation and mission-critical systems.

New!

Washington, DC4 days ago

$90,000–$130,000 Per Year

This role focuses on programming, configuring, and commissioning DDC systems while working closely with engineers, project managers, and field teams to ensure systems perform as designed from startup through turnover. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.

New!

Fairfax, VA4 days ago

$135,000–$200,000 Per Year

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. You will also have access to a strong benefits package that supports both your career and personal life, including flexible scheduling, competitive compensation, comprehensive healthcare, retirement planning, and tuition reimbursement.

Reston, VA9 days ago

Provide assistance and oversight for all information systems operations activities, including computer and telecommunications/communications operations, data entry, data control, LAN/MAN/WAN administration and operations support, operating systems programming, system security policy procedures, and/or web strategy and operations. Perform a variety of systems engineering tasks and activities that are broad in nature and are concerned with major systems design, integration, and implementation, including, hardware, software, budgetary, and support facilities and/or equipment.

New!

Sterling, VA4 days ago

$95,000–$135,000 Per Year

Successful candidates will have experience in Electrical Systems & Equipment with a focus in Data Centers and Mission Critical Facilities; experience and an understanding of Building MEP Systems Design, Construction, and Commissioning of Critical Systems ranging in size, rating, and complexity; Commissioning, Testing and Troubleshooting of Electrical Systems and related controls. Knowledgeable with common mechanical, and controls-related building equipment, including: Engine generators / Uninterruptible power supplies & battery systems / Medium and low-voltage electrical switchgear/ PLC controls and sequences of operations / Automatic transfer switches / Static transfer switches / Power distribution units / Busways.

New!

Washington, DC4 days ago

$90,000–$120,000 Per Year

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Our practical approach addresses our clients' complex energy needs, maximizing savings and return on investment while minimizing environmental impact across all served markets.

New!

MONTGOMRY VLG, MD2 days ago

$120,000–$140,000 Per Year

With deep expertise in cloud-first architectures, automation, DevSecOps, virtualization, reliability engineering, and large-scale systems integration, we help organizations modernize infrastructure, improve operational efficiency, and support mission-critical environments where performance, security, and resiliency are essential. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.

New!

Washington, DC4 days ago

$90,000–$120,000 Per Year

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Our practical approach addresses our clients' complex energy needs, maximizing savings and return on investment while minimizing environmental impact across all served markets.

New!

West McLean, VA2 days ago

$120,000–$160,000 Per Year

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. This role will focus on building automation solutions within Windows 11 environments to improve operational efficiency, strengthen security posture, and enhance the overall end-user experience.

New!

Baltimore, MD4 days ago

$130,000–$180,000 Per Year

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Join a highly respected, multidisciplinary engineering firm with over a century of success delivering complex infrastructure and building projects.

New!

Baltimore, MD4 days ago

$120,000–$150,000 Per Year

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. We are a Full-Service Engineering company that specializes in providing design and engineering services for all aspects of building and utility infrastructure construction.

New!

Washington, DCToday

$100,000–$200,000 Per Year

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. This is a permanent role that will require you to use your knowledge and experience in air distribution, ventilation, automation, controls, design, development, construction, QA, QC, LEED, BD+C, ASHRAE, and other related areas.

New!

Fairfax, VA4 days ago

$85,000–$130,000 Per Year

The ideal candidate will have a strong background in Electrical or Architectural Engineering and will be comfortable preparing technical design documents, modeling construction drawings for building systems, and managing projects from schematic design to construction administering phases. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.

New!

Fairfax, VA4 days ago

$90,000–$160,000 Per Year

Must be self-motivated and well versed in Data Center projects touching on large building MEP systems design, commissioning, retro-commissioning, energy modeling/analysis and construction for complex buildings. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.

New!

West McLean, VA4 days ago

$140,000–$215,000 Per Year

With first hand knowledge of problems that arise deploying software with millions of concurrent users worldwide, this paradigm changing tool will enable engineers to quickly, efficiently, and reliably develop and deploy large scale distributed systems autonomously. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.

New!

Arlington, VA4 days ago

$120,000–$150,000 Per Year

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. If you have a solid grounding in software engineering, continuous delivery, and computer science, and are looking for a career opportunity to grow and leverage those skills to the fullest while working on cutting edge technologies – Here is the place to be!

New!

Bethesda, MD4 days ago

$140,000–$180,000 Per Year

The organization partners, acquires, or in-licenses drugs from pharma companies, research organizations, and biotechs to develop programs past clinical proof of concept and beyond, ultimately helping to bring new medicines to patients. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.

New!

McLean, VA4 days ago

Remote

$140,000–$180,000 Per Year

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. You’ll design and build our machine learning infrastructure - starting with vector search and retrieval-augmented generation and expanding into fine-tuned LLMs with human feedback loops.

McLean, VA13 days ago

Architect and deliver end‑to‑end AI/ML solutions on Google Cloud using Vertex AI (Workbench, Pipelines, Training, Model Registry, Online/Batch Prediction, Feature Store, Model Monitoring) and Gemini/LLM services—optimized for performance, cost, and maintainability. Proven experience architecting robust data ingestion, processing, and transformation workflows using Dataflow, Data Fusion, Dataproc, BigQuery, and Looker and integrating these platforms with Vertex AI for model training, deployment, and inference.

New!

McLean, VA1 day ago

The ideal candidate will have hands-on experience supporting secure cloud environments, developing repeatable infrastructure patterns, improving deployment workflows, and helping engineering teams deliver workloads more efficiently. Experience developing, maintaining, or supporting CI/CD pipelines using tools such as GitLab CI/CD, Jenkins, GitHub Actions, AWS CodePipeline, or similar platforms.

Baltimore, MD7 days ago

$96,000–$115,200 Per Year

The ideal candidate will have in-depth experience with Workforce Management (WFM), Customer Relationship Management (CRM) systems, call recording solutions, dialers, reporting tools, API integrations, and a strong hands-on working knowledge of NiceCX systems. Data modeling experience to design, develop, and maintain GraphQL APIs and Data Solutions using RDBMS like Aurora, Postgres, and in-memory data stores like Amazon Memory DB and Redis, ensuring optimal performance, data integrity, availability and scalability.

Baltimore, MD10 days ago

$40–$50 Per Hour
Full-time
Employee

Job Details:Role: VMWARE Infrastructure EngineerLocation: Baltimore, MD ( On-site with Hybrid)Duration: 12 Months ContractDuties and Responsibilities:Enterprise Virtualization Management. Education and Years of Experience: Bachelor’s degree in Computer Science, Information Systems, Engineering, or related field (or equivalent experience).

New!

Baltimore, MD1 day ago

$116,000–$159,500

We are a Fortune 200 company, 20,000 colleagues strong serving more than 10.7 million customers at six energy companies -- Atlantic City Electric (ACE), Baltimore Gas and Electric (BGE), Commonwealth Edison (ComEd), Delmarva Power & Light (DPL), PECO Energy Company (PECO), and Potomac Electric Power Company (Pepco). Expert Agile development practices and good experience at using tools like ADO, JIRA, GitHub Cloud Technologies, Containers (Docker, Kubernetes, Service mesh, Istio), Cloud-Native, Streaming Data tools like Kafka, Snowflake, AI/ML Data Science.

Baltimore, MD30+ days ago

Temporary
Contractor
Full-time

Basic Qualifications for the Principal RF Test and Power Engineer: • Bachelor’s degree in electrical engineering or related STEM field plus 5 or more years of relevant experience; or a master’s degree in electrical engineering or related STEM field plus 3 or more years of relevant experience. Activities will range from hands-on testing and troubleshooting; to analysis of failure trends, root cause/ corrective actions; and attending program meetings to report yields, problems, and corrective actions.

Washington, DC8 days ago

$103,200–$141,900

Evaluates complex technical issues that require highly specialized knowledge in very specific areas and recommends actions or programs for their resolution, which may necessitate the review/evaluation of engineering design documents: Evaluates, develops, implements, and leads projects that have significant financial and operational impact, may also develop initial commissioning plans. We are a Fortune 200 company, 20,000 colleagues strong serving more than 10.7 million customers at six energy companies -- Atlantic City Electric (ACE), Baltimore Gas and Electric (BGE), Commonwealth Edison (ComEd), Delmarva Power & Light (DPL), PECO Energy Company (PECO), and Potomac Electric Power Company (Pepco).

Baltimore, MD7 days ago

$130,000–$156,000 Per Year

Along with security platform mastery in more than one platform area (IDS/IPS, firewall/WAF, access and identity, malware defense, threat modeling, exposure management, among others), the Principal Cybersecurity Engineer is formally trained in enterprise IT design and architecture practices. The Principal Cybersecurity Engineer has a demonstrated mastery in multiple security and non-security technology platforms, with the ability to both lead and advise on the overall designs and strategies of both security and non-security technologies.

Baltimore, MD8 days ago

$100,000–$180,000 Per Year
Full-time

We are currently seeking Senior Professional Electrical Engineer with broad engineering comprehension in the design and construction of complex building systems for commercial, institutional and industrial facilities, including mission critical facilities and LEED certified buildings or sustainable buildings. The specific compensation offered to a candidate may vary based on factors including, but not limited to, the candidate’s relevant knowledge, training, skills, work location, and/or experience.

New!

Baltimore, MD4 days ago

Bel Air, MD10 days ago

$92,000–$126,500

Develops studies, plans, criteria, specifications, calculations, evaluations, design documents, performance assessments, integrated systems analysis, cost estimates, budgets, associated with the planning, design, licensing, construction, commissioning, operation, and maintenance of Exelon's electric generation, transmission, distribution, gas and telecommunication facilities/systems. (4) Career related experiences is defined as changes in technical job responsibilities and does not have to include a change in department Note: Items (1) and (3) are mutually inclusive, whereby the maximum experience requirement reduction is one(1) year (e.g., in the case of an employee with both a master's degree in Engineering AND a PE license, the minimum experience requirement would be reduced by one (1) year).

New!

Alexandria, VA3 days ago

This role focuses on identifying, engaging, and hiring top talent with deep expertise in VMware products such as vSphere, ESXi, vCenter, NSX, and VMware Cloud platforms. · Manage full-cycle recruiting (sourcing, screening, interviewing, offer negotiation) for VMware-focused positions, including: o VMware Engineers.

New!

Baltimore, MD4 days ago

$100,000–$180,000 Per Year
Full-time

Whitman, Requardt & Associates, LLP (WRA) is a leading multidisciplinary engineering and architectural firm committed to providing innovative and sustainable solutions to our clients' most complex challenges. We are seeking the very best and most talented to join our team - help us take on challenges, develop vision solutions, and innovate and design the infrastructure of the future that will transform the world!

Baltimore, MD7 days ago

$110,000–$132,000 Per Year

In this role, you will work closely with Product, UX, Engineering Managers, and other senior engineers to shape platform architecture, guide technical direction, and deliver scalable, high-quality software that improves the financial wellness of our customers. See OneMain Financial Privacy Policy at https://www.onemainfinancial.com/legal and SonicJobs Privacy Policy at https://www.sonicjobs.com/us/privacy-policy and Terms of Use at https://www.sonicjobs.com/us/terms-conditions.

Rockville, MD30+ days ago

$122,400–$168,300

Develops and/or leads teams in studies, plans, criteria, specifications, calculations, evaluations, design documents, performance assessments, integrated systems analysis, cost estimates, budgets, associated with the planning, design, licensing, construction, operation, and maintenance of Exelon's electric generation, transmission, distribution, gas, and telecommunication facilities/systems. We are a Fortune 200 company, 19,000 colleagues strong serving more than 10 million customers at six energy companies -- Atlantic City Electric (ACE), Baltimore Gas and Electric (BGE), Commonwealth Edison (ComEd), Delmarva Power & Light (DPL), PECO Energy Company (PECO), and Potomac Electric Power Company (Pepco).

Baltimore, MD8 days ago

$72,000–$97,000 Per Year
Full-time

The Electrical Engineer, under direct supervision of senior staff, will work on projects relating to the design of electrical systems including lighting and power distributions systems for government, military, commercial, industrial, municipal and institutional facilities. A copy of current, or most recent, school transcript (If you are applying via a 3rd party site that does not allow attachments, please email transcript to careers@wrallp.com.

New!

Falls Church, VA3 days ago

Master required job-specific and technical skills in order to promote to an assistant superintendent or assistant project manager following the 12-month training program including, but not limited to, the ability to: Set up and maintain jobsite office and all jobsite records, including project directory, construction documents, subcontractor directory, daily reports, submittal logs, RFI logs, subcontractor correspondence, etc. Ability to learn sector- and project-specific software systems, including but not limited to: Microsoft Office 365 (Project, Excel, Word, Outlook, PowerPoint, etc.), ProCore, Adobe Suite, BlueBeam, and JD Edwards software suite .

New!

Catonsville, MDToday

$75,000–$90,000

Responsibilities: The Sales Engineer will bridge the gap between our engineering team and customers, providing expert advice and technical solutions that help clients understand and utilize our products. Based in Southern California since 2007, CoolSys serves over 45,000 customer locations in industries like retail, food service, commercial, data centers, industrial, and pharmaceuticals.

Baltimore, MD10 days ago

Qualifications You Must Have: * Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 3 years of prior relevant experience or an Advanced Degree in a related field and 2 years relevant experience or in absence of a degree, 7 years of relevant experience. * Proficient in configuration, troubleshooting, installation, operation, maintenance, and system administration of Multiple Linux distros such as RHEL and Ubuntu.

McLean, VA11 days ago

The disclosed range takes into account the wide range of factors that are considered in making compensation decisions including, but not limited to, geographic location, relevant education, qualifications, certifications, experience, skills, seniority, performance, sales or revenue-based metrics, and business or organizational needs. It delivers end-to-end services and solutions leveraging strengths from strategy and design to engineering, all fueled by its market leading capabilities in AI, generative AI, cloud and data, combined with its deep industry expertise and partner ecosystem.

New!

Washington, DC4 days ago

Remote

We are seeking a highly skilled, technically proficient and detail-oriented Principal Mechanical Engineer with expertise in metal structures, frame design, pipes and fabrication to support the development of power and cooling infrastructure for data centers. Design and develop mechanical frames, enclosures, and support structures for data center power and cooling products (UPS systems, battery racks, CRAC units, containment systems, LVS, MVS).

Alexandria, VA8 days ago

Consultants may work independently or as part of a small deployment team to assess environments, architect VMware solutions, and optimize VCF capabilities for customer sites. Support VMware VCF deployments across multiple U.S. locations (Alexandria, VA, Omaha, NE, Hanscom AFB, MA, Tampa, FL, Miami, FL, Fort Huachuca, AZ, San Diego, CA).

New!

Fairfax, VA2 days ago

PREFERRED QUALIFICATIONS: Current and valid Master HVAC License At least 7 years’ of experience as the lead and accountable person for the maintenance, repair, and operation of complex commercial HVAC equipment in high-rise, mid-rise, and low-rise buildings with a portfolio of over 3 million square feet to include two years of supervisory experience. Experience as the primary and lead HVAC technical expert and quality control inspector responsible for the day-to-day oversight, troubleshooting, and management for the operation, repair and replacement of complex HVAC systems AND components for a large portfolio (over 5 million square feet of occupiable space) of varied commercial building types and uses.

New!

Arlington, VA4 days ago

$120,000–$170,000 Per Year

If you have a strong background in Electrical engineering, with a particular focus on power generators, uninterruptible power supplies, life safety/emergency/mission critical power distribution, electric vehicle (EV) infrastructure, and other electrical equipment and system, we want to hear from you. Conduct surveys of existing areas and facilities, conduct design reviews, conduct code compliance inspections, witness code required testing, assist in code development and implementation, and execute small systems designs.

McLean, VA11 days ago

Resume Resources

Free Resume Templates Free Resume Builder

Get noticed by top employers!

Upload your resume to let employers know you're open to Systems Engineer job opportunities. Plus, receive relevant job recommendations in your inbox.

Create A Free Account

Systems Engineer Jobs in Columbia, MD

System Integration & Test Engineer Jobot

Associate, Systems Administrator HITT Contracting

System Safety Engineer Jobot

Linux Systems Administrator - TS/SCI-FSP clearance Jobot

System Integration & Test Engineer (FAA / Air Traffic Control) Jobot

Building Automation Systems (BAS) Programmer Jobot

Senior Electrical Engineer (Mission Critical) Jobot

Network Engineer II NuAxis Innovations

Electrical Commissioning Project Engineer Jobot

Electrical Commissioning Engineer Jobot

Hardware Engineer Jobot

Mechanical Commissioning Engineer Jobot

Senior PowerShell Engineer (Secret Clearance) Jobot

Senior Mechanical Engineer (lead) Jobot

Electrical Engineer, Infrastructure Design Jobot

Senior Mechanical Engineer Jobot

Electrical Engineer: Hybrid Jobot

Commissioning Engineer (Data Centers) Jobot

Senior Software Engineer Jobot

Software Engineer Jobot

Senior Data Engineer Jobot

Senior AI/ML Engineer Jobot

Senior Google AI Engineer Credence

Cloud Platform Engineer Credence

Lead Software Engineer OneMain Financial

VMWARE Infrastructure Engineer Creative Global Consulting, LLC

Sr. Software Engineer 2 (IFS) Exelon

ENGINEER DIGITAL 3 Aroha Technologies

Sr Engineer Exelon

Principal Cybersecurity Engineer- Architecture OneMain Financial

Senior Electrical Engineer Whitman, Requardt & Associates, LLP

Stationary Engineer 3rd Class Davron LLC

General Engineer Exelon

IT/VMWare Recruiter Calibre Systems

Sr. Mechanical Lead Engineer Whitman, Requardt & Associates, LLP

Staff Software Engineer (React, TypeScript, Rails, Node) OneMain Financial

Prin Engineer (Underground Transmission) Exelon

Electrical Engineer - Entry Level Whitman, Requardt & Associates, LLP

Commercial Construction Project Engineer HITT Contracting

Sales Engineer CoolSys

Senior Linux System Administrator Butler Aerospace and Defense

DevOps Engineer Capgemini Government Solutions LLC

Principal Mechanical Integration Engineer – DCI Pipes, Frames and Structures (REMOTE) JABIL CIRCUIT, INC

VMware Consultant- Active Clearance REQUIRED Calibre Systems

HVAC and Plumbing Quality Control Engineer (Engineer II) Fairfax County Government

Electrical Engineer Chinook Systems

Sr. ETL/SQL Engineer Capgemini Government Solutions

Resume Resources