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Founded in 1972, Easton-based Environmental Concern Inc. is a nonprofit wetland restoration organization that designs and builds living shorelines, restores wetlands and grows native plants for Chesapeake Bay projects. Its restoration division has helped restore more than 50 miles of shoreline, while its nursery—identified as the nation’s first wholesale wetland plant nursery—propagates more than 100 native species from locally collected seed. The organization also provides wetland education and professional training from the perspective of practitioners doing the work.
For more than 20 years, EPI Colorspace has been the in-house visual partner behind branded spaces for cultural institutions, universities, and commercial properties in the DMV. The Gaithersburg company is known for carrying projects from concept through installation, including environmental graphics for George Washington University and the Smithsonian.
From its Annapolis headquarters, Epic Optix designs optical-engineering systems that tackle specialized problems in aviation and portable display technology. Its signature Epic Eagle brings a full-color, true head-up display—technology long associated with military aircraft—to general-aviation cockpits, while the compact Epic Event projector is built for sharing media on the move. The company’s international founding team combines optical, mechanical and electronics engineering to develop practical systems around common components and controlled costs.
Epimoni Consulting Group develops security and defense solutions while operating business units for training, medical services, manufacturing, and supply-chain logistics. Its work spans specialized security education—from cybersecurity to forensic war-crime investigation—and the procurement and distribution of resources, with an emphasis on American-made products and services.
Founded in 2016 by veteran MBE growth engineer Ryan Enck, EpiTech builds customized electronics for molecular beam epitaxy reactors and helps operators repair, maintain, and modernize their equipment. The company’s products are designed by MBE engineers for day-to-day usability, while its team brings more than two decades of experience growing epitaxial films and working across reactor manufacturers, including support for older Gen II systems.
EPS Corporation grew from a family business founded in 1983 by Francesco A. Musorrafiti and his daughter, Antoinette “Toni” Musorrafiti, in a room over their garage. Today, the woman-owned small business employs more than 250 people, with Toni still involved in daily operations, and supports military and federal customers worldwide through systems engineering and related technical services. Its work is backed by ISO 9001:2015 certification, AS9100D, and CMMI-Development Level 3 processes.
Nearly a century after Ernest Maier Sr. began making masonry blocks by hand in 1926, Ernest Maier remains a family-owned and operated company rooted in hard work, honesty and service to its community. The Mid-Atlantic business now supports construction projects with concrete and other building materials for contractors, architects, engineers and homeowners.
Founded in Bladensburg in 1926, Ernest Maier began as a family masonry-block business and remains a family-owned and operated construction-supply enterprise. The company manufactures and distributes building materials across the Mid-Atlantic, with its operations including masonry block production and ready-mix concrete delivery.
ES Flagpoles sells and fabricates aluminum and fiberglass flagpoles, including residential and commercial configurations, and provides flagpole installation, repair, refinishing, lighting, and climbing services. The company serves residential, commercial, municipal, military, government, and educational customers across Maryland, Delaware, Virginia, Washington, DC, and Pennsylvania.
Founded in 1904 after Oscar Kjellberg developed the world’s first coated welding electrode, ESAB makes welding and cutting equipment, consumables, and fabrication technology. From its origins in welding history, the company has grown into a global manufacturer serving 147 countries through 26 manufacturing plants and more than 40 global and regional brands.
Woman-owned ESP Controls has been building custom industrial control panels since 1984 from its base in Owings Mills, serving manufacturers and distributors throughout the Baltimore/Washington corridor. Its work ranges from one-off projects to production runs of several thousand panels, with designs tailored to each customer's operation. The company is a UL-listed shop and has also been classified for elevator control panels.
Essilor makes vision-correction and protective spectacle lenses, with a history of lens design and fabrication dating back to 1849. Its U.S. site presents lens families for myopia management, single vision, progressive vision, and light adaptation.
Founded by Johns Hopkins materials scientist Jonah Erlebacher, ETCH, Inc. develops clean hydrogen and solid carbon from natural gas through its patented ETCH Process™. The process produces no carbon dioxide or toxic waste and uses no water, while scaling from distributed installations to utility-scale facilities. ETCH’s technology is designed to decarbonize existing industrial and power assets while creating usable solid carbon as a coproduct.
Sydney-headquartered Etherstack develops and licenses wireless communications technology for mission-critical voice and data, while also building tactical products and digital radio systems. Its distinctive strength is waveform and land-mobile-radio expertise: the company says its software is used by more than 70% of LMR radio manufacturers, with waveforms ported to over 20 radio platforms. Etherstack has maintained R&D and support centres in Australia, the United Kingdom, the United States and Japan for more than 20 years.
Since 1994, ETI Precision has calibrated, repaired, and sold test-and-measurement equipment while manufacturing its own high-current circuit-breaker testers and variable power supplies. Its ISO/IEC 17025:2017-accredited team provides on-site calibration in all 50 states, bringing specialized expertise to high-current and high-voltage equipment while helping customers limit downtime. ETI Precision is part of the Accredited Labs network and also holds ISO 9001:2015 accreditation.
Privately held by Moskowitz Family LLC, EuclideanSpine® is a Rockville company founded in 2004 around the design of customized surgical implants. Its leadership brings together a practicing neurosurgeon and engineers with academic backgrounds at institutions including Johns Hopkins, Princeton, and the University of Maryland. The company is known for its spine-focused research and patent activity, ranking 14th in Spinemarket’s 2023 Patent Power Index.
EuQlid is a quantum-sensing startup founded by Sanjive Agarwala, David Glenn, and Ronald Walsworth. The company develops magnetic imaging technology for researchers and manufacturers working to understand hidden electrical behavior in advanced semiconductors and batteries.
Serving the Washington metropolitan area since 1979, Euro Design Center Closet designs, manufactures, and installs custom closet and storage systems from its Maryland facilities. The company takes projects from in-home consultation and 3D visualization through fabrication and installation without a middleman, with designers focused on making the most of difficult or limited spaces. Its long-running work includes residential closets as well as home offices and other built-in storage.
Founded in the Netherlands in 2001 to solve the challenge of sorting irregularly shaped items, EuroSort manufactures high-speed unit sortation systems for warehouses and distribution centers. Its mechanical, modular designs include the original Split Tray sorter and are built to handle changing product mixes with compact layouts and low-maintenance operation. EuroSort opened its North American headquarters near Baltimore in 2003 and now has more than 200 employees worldwide, with over 500 sorters installed globally.
Founded in 1976, EVAPCO designs and manufactures heat-transfer equipment for evaporative cooling and industrial refrigeration applications. The employee-owned company became employee owned and operated in 1984 and now engineers and manufactures products at 36 locations in 14 countries, supported by a sales network of more than 200 offices. Its Mr. GoodTower operation extends that work into maintenance, repair and replacement support for evaporative cooling equipment.