> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/naics/238990/maryland/ # NAICS 238990 companies in Maryland Companies with NAICS code 238990 (All Other Specialty Trade Contractors) headquartered in Maryland, with their cities, sizes and SIC codes. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** The biggest NAICS 238990 companies in Maryland by headcount range include Manganaro Building Group, Pcm Services and Reliable Contracting. NAICS 238990 is the code for All Other Specialty Trade Contractors. Among those counted, they are mostly very small: 66% have 50 or fewer employees. ## Which NAICS 238990 companies are in Maryland? The biggest by headcount range include Manganaro Building Group, Pcm Services, Reliable Contracting, National Fire Protection and Hercules Fence. NAICS 238990 is the code for All Other Specialty Trade Contractors. Names link to a company profile where we have one. | Company | City | Employees | | --- | --- | --- | | Manganaro Building Group | Beltsville | 501 to 1,000 | | Pcm Services | Beltsville | 201 to 500 | | Reliable Contracting | Gambrills | 201 to 500 | | National Fire Protection | Rockville | 201 to 500 | | Hercules Fence | Jessup | 51 to 200 | | Extra Clean | Gaithersburg | 51 to 200 | | Gordon Contractors | Capitol Heights | 51 to 200 | | The Berg | Baltimore | 51 to 200 | | G & M Services | Hanover | 51 to 200 | | Scheibel Construction | Huntingtown | 51 to 200 | | All States Construction | Bishopville | 51 to 200 | | Osprey Bay Building & Development | Millersville | 51 to 200 | | Plexus Installations | Baltimore | 51 to 200 | | Pdi-Sheetz Construction | Linthicum | 51 to 200 | | Peak Custom Remodeling | Owings Mills | 11 to 50 | | American Home Contractors | Fulton | 11 to 50 | | Strum Contracting | Baltimore | 11 to 50 | | Hawkeye Construction | Rosedale | 11 to 50 | | Polished Concrete Systems | Forest Hill | 11 to 50 | | Dirt Plus | Upper Marlboro | 11 to 50 | | Kitchen Concepts Plus | Salisbury | 11 to 50 | | All-American Intelligent Solutions | Baltimore | 11 to 50 | | Basement Systems Usa | Elkton | 11 to 50 | | Vanguard General Contracting | Edgewater | 11 to 50 | | Dms Sign Connection | Mount Airy | 11 to 50 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## Which cities in Maryland? Within Maryland, Baltimore (15%), Beltsville (7%) and Gaithersburg (7%) are the most common headquarters. **Figure: Cities of NAICS 238990 companies in Maryland.** Bars for the share of counted NAICS 238990 companies in Maryland headquartered in each city: Baltimore 15%, Beltsville 7%, Gaithersburg 7%, Hanover 7%. *Share of counted NAICS 238990 companies in Maryland by headquarters city.* ## How big are they? 66% of the NAICS 238990 companies counted in Maryland have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. **Figure: Size of NAICS 238990 companies in Maryland.** Seven columns for the share of counted NAICS 238990 companies in Maryland in each employee range: 11 to 50 66%, 51 to 200 24%, 201 to 500 7%, 501 to 1,000 2%, 1,001 to 5,000 0%, 5,001 to 10,000 0%, 10,001+ 0%. *Share of counted NAICS 238990 companies in Maryland in each employee range.* ## Which SIC codes do they carry? The older SIC system and NAICS do not line up one to one. These are the SIC codes seen most here. **Figure: SIC codes of NAICS 238990 companies in Maryland.** Bars for the share of counted NAICS 238990 companies in Maryland with each code: 1799 66%, 1771 10%, 1521 7%. *Share of counted NAICS 238990 companies in Maryland by their SIC code.* ## How do you reach the people at these Maryland companies? The people to talk to are usually owners, operations and procurement leaders. Build the list in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the companies with NAICS code 238990 in Maryland ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the owners, operations and procurement leaders at companies with NAICS code 238990 in Maryland, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore About the code: [NAICS 238990: All Other Specialty Trade Contractors](https://enrich.chat/naics/238990/). About the place: [companies in Maryland](https://enrich.chat/companies-in/maryland/). NAICS 238990 in other states: [Texas](https://enrich.chat/naics/238990/texas/)[California](https://enrich.chat/naics/238990/california/)[Florida](https://enrich.chat/naics/238990/florida/)[Illinois](https://enrich.chat/naics/238990/illinois/)[New York](https://enrich.chat/naics/238990/new-york/)[Pennsylvania](https://enrich.chat/naics/238990/pennsylvania/) Other NAICS codes in Maryland: [NAICS 541511: Custom Computer Programming Services](https://enrich.chat/naics/541511/maryland/)[NAICS 541512: Computer Systems Design Services](https://enrich.chat/naics/541512/maryland/)[NAICS 236220: Commercial and Institutional Building](https://enrich.chat/naics/236220/maryland/) ## Frequently asked questions ### Which NAICS 238990 companies are in Maryland? The biggest by headcount range include Manganaro Building Group, Pcm Services, Reliable Contracting, National Fire Protection and Hercules Fence. The page lists 25 with links to their profiles where we have them. ### What is NAICS 238990? NAICS 238990 is the code for All Other Specialty Trade Contractors, in sector 23: Construction. ### Which cities in Maryland have the most? Baltimore (15%), Beltsville (7%) and Gaithersburg (7%) lead among the companies counted. ## Try this prompt Find the people at NAICS 238990 companies in Maryland ```text Use www.enrich.chat to find the owners, operations and procurement leaders at companies with NAICS code 238990 in Maryland, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [NAICS 238990 in Texas](https://enrich.chat/naics/238990/texas/) - [NAICS 238990 in California](https://enrich.chat/naics/238990/california/) - [NAICS 238990 in Florida](https://enrich.chat/naics/238990/florida/) - [NAICS 238990 in Illinois](https://enrich.chat/naics/238990/illinois/) - [NAICS 541511 in Maryland](https://enrich.chat/naics/541511/maryland/) - [NAICS 541512 in Maryland](https://enrich.chat/naics/541512/maryland/) - [NAICS 236220 in Maryland](https://enrich.chat/naics/236220/maryland/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)