Trigyn Technologies IncSr. Systems Engineer - Microsoft 365 Trigyn Technologies IncSr. Systems Engineer - Microsoft 365Baltimore, MDTemporaryContractorFull timeExperience managing directory sync into Azure AD and deep knowledge of Azure AD Sync for Federation, authentication, SSO, and directory sync with Azure AD. Systems engineer – Microsoft 365 to develop solutions for e-mail and collaboration tools as well as handle day-to-day operations within the division.
JobotNewSystem Integration & Test Engineer JobotSystem Integration & Test EngineerColumbia, MD$110,000–$165,000 / yearWith 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.
DCS CorporationNewAvionics Systems Engineer DCS CorporationAvionics Systems EngineerPatuxent River, MD$90,220–$140,000 / yearWork independently on smaller projects while directing the efforts of larger teams on multiple simultaneous projects integrating safety critical systems into Navy aircraft. Lead a dynamic team of software and hardware engineers integrating safety critical systems into Navy aircraft.
Tenable Network SecuritySenior Research Engineer, Systems Engineering Team Tenable Network SecuritySenior Research Engineer, Systems Engineering TeamColumbia, MDRemote$122,500–$163,166.67 / yearDeep expertise in at least one relevant security domain (e.g., Application Security, Vulnerability Management, Cloud Security, Container Security, Threat Intelligence, Software Supply Chain, Network Security, Cryptography), combined with broad general knowledge across security and engineering. This team serves as the critical bridge between our Research organization and Product teams, driving technology transfer and productization of cutting-edge security innovations.
LeidosSenior Systems Engineer LeidosSenior Systems EngineerBethesda, MD$131,300–$237,350As the Senior System Engineer, you will perform and manage the full spectrum of systems engineering tasks to include requirements analysis, feature, system and interface design, system integration, system testing, as well as working with the SE team in support of Model Based Systems Engineering (MBSE) and all associated documentation. As a senior member of the team, you bring deep expertise in Systems Engineering (SE) and will work closely with Systems Engineers, Software Engineers, Architects as well as Government counterparts on the following key tasks:
Varada ConsultingSystem Engineer Varada ConsultingSystem EngineerLinthicum, MDPreferred Qualifications: Working knowledge of the DoD Information Network (DODIN), DoD IT system and network certification and accreditation processes (i.e., RMF), to include system security authorization agreements and current and emerging cybersecurity threats. This role involves evaluating vulnerabilities, translating threat intelligence into technical mitigations, and supporting C3I systems engineering efforts.
Carter Machinery Company, IncNewPOWER SYSTEMS DIVISION (PSD) APPLICATIONS ENGINEER Carter Machinery Company, IncPOWER SYSTEMS DIVISION (PSD) APPLICATIONS ENGINEERElkridge, MD$0.75–$1.25 / hourCarter Machinery Company, the authorized Caterpillar dealer serving Virginia, West Virginia, Maryland, Delaware and Washington D.C. is hiring an Applications Engineer for our Power Systems Division in Elkridge, Maryland. The Applications Engineer is responsible for assisting consulting engineers, contractors, and end-users in the design of power plants that result in the sale of Caterpillar power generation products.
System OneHVAC System Engineer System OneHVAC System EngineerWestminster, MDRemote$75,000–$113,000 / yearThe Project Engineer is responsible for the system design, including system calculations, system drawings, integration, testing, commissioning support, and technical support to other internal departments. Execute the design and development of HVAC systems and controls for passenger rail transit vehicles, ensuring on-time delivery within budget and specifications.
LeidosNewLead Systems Integration Engineer LeidosLead Systems Integration EngineerGaithersburg, MD$87,100–$157,450TFDM program is a Federal Aviation Administration’s (FAA) NextGen program based on airport surface management provides that efficiencies for both the airport surface and terminal airspace by providing a new and comprehensive integrated surface traffic control and management system. June 3, 2026For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
JobotNewSenior Software Engineer (C++ / Java) JobotSenior Software Engineer (C++ / Java)MONTGOMRY VLG, MD$165,000–$185,000 / yearWith 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. This role is ideal for a seasoned engineer who enjoys solving complex technical challenges, contributing to system architecture, and partnering closely with Systems Engineering, Development, and Test teams to deliver robust, scalable solutions.
JobotNewSr. Software Engineer JobotSr. Software EngineerGaithersburg, MD$140,000–$165,000 / yearWith 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.
LeidosSenior Systems Engineer Concurrent Engineering Lead LeidosSenior Systems Engineer Concurrent Engineering LeadGaithersburg, MD$107,900–$195,050The Terminal Flight Data Management (TFDM) program is a Federal Aviation Administration’s (FAA) NextGen program based on airport surface management that provides efficiencies for both the airport surface and terminal airspace by providing a new and comprehensive integrated surface traffic control and management system. Stakeholders will have a shared awareness of flights on the ground and in the air, the ability to exchange data electronically, with the goal of a continuous real-time picture of traffic volume and airport resources, making flights more efficient from gate to gate.
The H&K GroupNewProject Engineer The H&K GroupProject EngineerFinksburg, MDThe Project Secretary provides administrative and operational support to project managers and the entire team to ensure smooth project coordination, documentation management, communication, and other aspects of the operations. Beginning as a small family business a half century ago, we are now a dynamic group of vertically integrated companies that has been growing and prospering for over 50 years.
JobotNewBuilding Electrical Engineer JobotBuilding Electrical EngineerArbutus, MD$90,000–$120,000 / yearInformation 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 an Electrical Engineer II to support the design and delivery of electrical systems across multiple office locations, including Columbus, Akron, Baltimore, Jacksonville, and Pensacola.
JobotNewHardware Engineer JobotHardware EngineerMONTGOMRY VLG, MD$120,000–$140,000 / yearWith 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.
JobotNewRCDD Technology Engineer JobotRCDD Technology EngineerBaltimore, MD$140,000–$190,000 / yearInformation 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 serves as a trusted advisor to clients, leading technology consulting efforts while supporting business development, proposal preparation, project execution, and team mentorship.
JobotNewSenior Mechanical Engineer (lead) JobotSenior Mechanical Engineer (lead)Baltimore, MD$130,000–$180,000 / yearInformation 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.
JobotNewElectrical Engineer, Infrastructure Design JobotElectrical Engineer, Infrastructure DesignBaltimore, MD$120,000–$150,000 / yearInformation 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.
ExelonNewPrin Quantitative Engineer ExelonPrin Quantitative EngineerSalisbury, MD$129,600–$178,200The Quantitative Engineer will lead initiatives on developing quantitative methodologies and providing quantitative analysis to support engineering studies, plans, calculations, evaluations, design documents, integrated systems analysis, cost estimates, budgets, associated with the research, planning, design, operation, and maintenance of Exelon Utilities' overall strategic plans and initiatives. 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).
LeidosSenior Network Engineer LeidosSenior Network EngineerCamp Springs, MD$107,900–$195,050The Senior Systems Engineer will provide technical leadership and support in the areas of IT planning, solution specification/design, implementation and target architecture development for the AFNCR Consolidated Communication Center (CCC). If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
By Light Professional IT ServicesIP Network Test Engineer By Light Professional IT ServicesIP Network Test EngineerFort Meade, MDExpertise in large-scale IP Networking & Testing with backbone routers (Juniper MX and Cisco ASR9K) running ISIS, BGP/MP-BGP (multi AS), MPLS routing protocols, switches and testing gear including traffic generators from IXIA, Spirent Test Center and Agilent N2X. These technologies include network devices (routers, switches, firewalls, and Intrusion Detection Systems (IDS), and services Authentication, Authorization and Accounting (AAA), Access Control List (ACL), secure remote access (i.e Secure shell, Secure VPN, IPSec), and IPv6 capable devices.
By Light Professional IT ServicesCommunications Network Engineer III By Light Professional IT ServicesCommunications Network Engineer IIIFort Meade, MDBy Light also considers other variables such as (but not limited to) work experience, education, training, skill set, internal peer equity, clearance level and market conditions when extending an offer. By Light Professional IT Services LLC readies warfighters and federal agencies with technology and systems engineered to connect, protect, and prepare individuals and teams for whatever comes next.
System OneNewSoftware Engineer with TS-SCI with Poly System OneSoftware Engineer with TS-SCI with PolyFort Meade, MD$97,000–$224,000 / yearBachelor’s degree in Computer Science or related discipline from an accredited college or university OR four (4) years of additional SWE experience on projects with similar software processes in lieu of degree . Design, develop and modify software systems, using scientific analysis and mathematical models to predict and measure outcome and consequences of design .
Creative Global Consulting, LLCVMWARE Infrastructure Engineer Creative Global Consulting, LLCVMWARE Infrastructure EngineerBaltimore, MD$40–$50 / hourFull timeJob 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).
BERING STRAITS PROFESSIONAL SERVICES LLCSTRMM Network Engineer BERING STRAITS PROFESSIONAL SERVICES LLCSTRMM Network EngineerAberdeen, MDBering Straits Professional Services (BSPS) is committed to world-class management of global logistics, training and procurement services for U.S. Government agencies. The work environmental characteristics described here are representative of those that must be borne by an employee to successfully perform the essential functions of the role.
Bowhead / UIC Technical ServicesMechanical Engineer Bowhead / UIC Technical ServicesMechanical EngineerPatuxent River, MDFive (5) years of specialized experience in mechanical and plumbing schematic design and design development, evaluation of new and existing commercial facilities, industrial and health care facilities similar to the building types prevalent in the NAVFAC Washington Area of Responsibility (AOR). The Mechanical Engineer provides mechanical engineering design and production support from project inception through construction, ensuring technical accuracy, regulatory compliance, and high-quality deliverables for federal infrastructure projects.
Bowhead / UIC Technical ServicesElectrical Engineer Bowhead / UIC Technical ServicesElectrical EngineerPatuxent River, MDThe Electrical Engineer provides electrical engineering design and production support from project inception through construction, ensuring technical accuracy, regulatory compliance, and high-quality deliverables in support of federal infrastructure projects. Minimum of five years of experience as an Electrical Engineer, with demonstrated experience in Design and Contract Document preparation for new and existing buildings similar to the building types prevalent in the NAVFAC Washington Area of Responsibility.
DCS CorporationNewAvionics Data Engineer DCS CorporationAvionics Data EngineerPatuxent River, MD$90,220–$140,000 / yearOperate independently and as part of multiple larger teams to evaluate vendor solutions for US Navy aircraft data storage, data retrieval, and data processing. DCS is seeking a senior systems engineer with avionics data storage and data processing experience.
By Light Professional IT ServicesCyber Range Engineer By Light Professional IT ServicesCyber Range EngineerFt. Meade, MD5+ years of combined experience with Computer Network Operations (CNO)/ Computer Network Exploitation (CNE)/ Computer Network Defense (CND) platforms, cyber training, validation exercises, and working with cyber protection teams (CPTs), including planning, coordinating, and execution. The successful candidate possesses hands-on experience in both Windows and Linux systems, virtualized infrastructures, and cybersecurity tools, with the ability to develop, deploy, and troubleshoot complex training scenarios.
By Light Professional IT ServicesNetOps System Administrator Shift Lead By Light Professional IT ServicesNetOps System Administrator Shift LeadFort Meade, MD$125,000–$140,000 / yearThe Network Operations (NetOps) Shift Lead will lead shift personnel in supporting the daily operations, performance, and availability of network infrastructure and services. Since 2004, CESI has been at the forefront of developing, maintaining, and integrating simulation-based training, serious gaming, technical services, training and other support in live, virtual, constructive, and gaming (LVCG) domains.
MAXISIQ, Inc.NewLinux Admin/Test Engineer MAXISIQ, Inc.Linux Admin/Test EngineerHanover, MDWe're seeking a seasoned Linux Admin/Test Engineer to join our elite team in Hanover, Maryland where your work will directly contribute to achieving critical national cyber mission objectives, offering a unique opportunity to make a meaningful impact unlike any other program in this field. Since 2006, MAXISIQ has advanced the state of Cyber RDT&E by bringing together industry expertise in software, hardware, communications and security, and leveraging decades of operational experience to deliver exceptional value to communities and the critical missions they support.
By Light Professional IT ServicesNetOps System Administrator By Light Professional IT ServicesNetOps System AdministratorFort Meade, MD$110,000–$130,000 / yearThe Network Operations (NetOps) Shift Lead will lead shift personnel in supporting the daily operations, performance, and availability of network infrastructure and services. Since 2004, CESI has been at the forefront of developing, maintaining, and integrating simulation-based training, serious gaming, technical services, training and other support in live, virtual, constructive, and gaming (LVCG) domains.
OneMain FinancialNewLead Software Engineer OneMain FinancialLead Software EngineerBaltimore, MD$96,000–$115,200 / yearThe 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.
LeidosSenior AI Engineer (SWE-3) LeidosSenior AI Engineer (SWE-3)Linthicum Heights, MD$107,900–$195,050Mission Focus: Collaborate closely with technical leadership to design, develop, and maintain LLM orchestration frameworks that coordinate static analyzers, retrieval-augmented generation (RAG) systems, and automated testing pipelines. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
BERING STRAITS PROFESSIONAL SERVICES LLCSTRMM System Administrator BERING STRAITS PROFESSIONAL SERVICES LLCSTRMM System AdministratorAberdeen, MDEducation Requirements: Bachelor’s degree in Computer Science, OR An associate’s degree plus seven (7) total years of recent specialized experience, OR a certification plus seven (7) years of recent specialized experience, OR eleven (11) total years of recent specialized experience. Must hold the following certifications: advanced certifications CompTIA A+ , CompTIA Network+ CCNP, CCNA, MCSE and leadership in large-scale network operations.
Davron LLCNewStationary Engineer 3rd Class Davron LLCStationary Engineer 3rd ClassBaltimore, MDSTATIONARY ENGINEER | STATIONARY ENGINEER 3RD CLASS | MAINTENANCE TECHNICIAN | STATIONARY ENGINEER LICENSE | HVAC CONTROLS | BOILER SYSTEMS | CHILLER PLANT | BUILDING MAINTENANCE | PREVENTIVE MAINTENANCE | MECHANICAL TROUBLESHOOTING | SENIOR LIVING FACILITY | FACILITIES MAINTENANCE. Join a mission-driven senior living community in Baltimore, MD that takes pride in maintaining an exceptionally clean, well-run facility where residents are treated with dignity and compassion.
DCS CorporationNewWaveform Engineer DCS CorporationWaveform EngineerPatuxent River, MD$90,220–$140,000 / yearA Bachelor's degree in an Engineering discipline plus 8 years of experience is required. https://careers.dcscorp.com/pages?page=dcsbenefits.
OneMain FinancialNewPrincipal Cybersecurity Engineer- Architecture OneMain FinancialPrincipal Cybersecurity Engineer- ArchitectureBaltimore, MD$130,000–$156,000 / yearAlong 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.
JouléSenior Mechanical Engineer II JouléSenior Mechanical Engineer IIMONTGOMRY VLG, MD$115,000–$140,000 / yearA growing life sciences and bioprocessing organization is seeking a Senior Mechanical Engineer II to support the design and development of advanced mechanical systems and sterile consumable technologies used in GMP manufacturing environments. This is a highly collaborative, hands-on engineering role offering exposure to innovative bioprocessing technologies, cross-functional development teams, and complex product development initiatives.
LeidosSenior Software Engineer (SWE-3) LeidosSenior Software Engineer (SWE-3)Fort Meade, MD$107,900–$195,050The software engineer will work closely with data scientists and end users to develop innovative analytic tools to further discovery and tradecraft around critical global challenges, then deliver innovative solutions focused on operationalizing data science. Mission Focus: Work directly with data scientists as well as mission analysts to solve the most demanding strategic problems; perform end-to-end software engineering to prototype, develop, integrate, test, and deploy tools and tradecraft into the customer’s corporate architecture.
MANTECHCNO Reverse Engineer MANTECHCNO Reverse EngineerHanover, MDIn this role, you will contribute to the development of mission-critical cyber capabilities, drive excellence in CNO development and lead efforts in advanced Computer Network Operations (CNO). Perform Reverse Engineering of Hardware Components and Software Applications to design and develop new bleeding edge CNO software.
LeidosArtificial Intelligence (AI) Engineer (SWE-2) LeidosArtificial Intelligence (AI) Engineer (SWE-2)Linthicum Heights, MD$87,100–$157,450Mission Focus: Collaborate closely with technical leadership to design, develop, and maintain LLM orchestration frameworks that coordinate static analyzers, retrieval-augmented generation (RAG) systems, and automated testing pipelines. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
DCS CorporationSenior GPS Navigation Engineer DCS CorporationSenior GPS Navigation EngineerPatuxent River, MD$90,220–$140,000 / yearEssential Job Functions: work independently and as part of a team to evaluate vendor and government led inegrations for upgrading GPS navigations systems with the latest multi-frequency technologies. Bachelor's degree in Engineering, minimum 8 years of experience, at least 3 years of experience supporting aircraft avionics integrations of GPS navigation systems, preferably into military aircraft.
Whitman, Requardt & Associates, LLPSenior Electrical Engineer Whitman, Requardt & Associates, LLPSenior Electrical EngineerBaltimore, MD$100,000–$180,000 / yearFull timeWe 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.
DCS CorporationNewJr. Navigation Data Integrity Engineer DCS CorporationJr. Navigation Data Integrity EngineerPatuxent River, MD$60,467–$80,000 / yearStrong communication skills, attention to detail, experienced team member, ability to work closely with multiple diverse teams simultaneously, and the drive to contribute to program success. Trace and analyze aeronautical navigation data through mission planning and aircraft avionics systems to recommend certification for Performance-Based Navigation.
DCS CorporationNewSr. Navigation Data Integrity Engineer DCS CorporationSr. Navigation Data Integrity EngineerPatuxent River, MD$84,137–$120,000 / yearStrong communication skills, attention to detail, experienced team member, ability to work closely with multiple diverse teams simultaneously, and the drive to contribute to program success. Intimate knowledge of DAFIF specification, ARINC 424 specifications, and other commercial navigation database formats.
Howmet AerospaceNewSenior Environmental Engineer Howmet AerospaceSenior Environmental EngineerColumbia, MDTo learn more about the way Howmet Aerospace Inc. is advancing the sustainability of our customers, markets, and communities where we operate, review the 2025 Environmental Social and Governance report at www.howmet.com/esg-report. Manage all environmental issues, regulatory reports and permits as related to following disciplines: Air, Wastewater, Storm Water, Chemical, and Waste Disposal/Recycling.
Tenable Network SecurityNewPre-Sales Engineer - Remote Tenable Network SecurityPre-Sales Engineer - RemoteColumbia, MDRemote$87,000–$115,666.67 / yearYou will be partnering with Commercial Territory Managers and a strong team of peers to differentiate the Tenable solutions from our competitors, create lasting customers by positioning unique business values they are looking for and most importantly, create raving fans of Tenable throughout your area of influence. Strong communication skills with the ability to tailor and deliver impactful presentations to diverse audiences, including engineers, security professionals, and executive stakeholders.
ExelonPrin Engineer (Underground Transmission) ExelonPrin Engineer (Underground Transmission)Rockville, MD$122,400–$168,300Develops 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).