GCS Sigal
GCS-SIGAL is a privately held Washington, DC general contractor delivering commercial interiors, base building, multifamily housing, and historic preservation construction across the DC metro area for government, education, healthcare, hospitality, and private enterprise clients.
- Company typePrivate
- Founded1977
- HeadquartersWashington, United States
- Headcount11–50
- GTM typeB2B
- OfferingServices
What GCS Sigal does
GCS-SIGAL is a privately held general contractor headquartered in Washington, DC, providing construction services throughout the DC metropolitan area (Washington DC, Maryland, and Virginia). The firm traces its roots to 1977, when Gerry and Ellen Sigal founded SIGAL Construction Corporation with $2,214; GCS, Inc. was established in 1986 as a carpentry and labor affiliate, and the two entities were officially combined in 2018 to form the current GCS-SIGAL. With 11-50 direct employees, the firm operates across nine market sectors: commercial office, healthcare and life sciences, higher education, hospitality, industrial, K-12 education, multi-family housing, parks and recreation, and retail.
The company's service portfolio is organized around four core offerings — commercial interiors, base building and multifamily, renovations and historic preservation, and adaptive reuse — delivered through design-build, construction management, and traditional general contracting approaches. Technical differentiators include deep historic preservation expertise, sustainable construction practices (the firm is a founding 1993 member of the U.S. Green Building Council), and DC's first mass timber project (the Arboretum Community Center using Cross-Laminated Timber). The firm runs Procore as its construction management platform and Compass App for trade partner prequalification, and holds a 12-point Certified Business Enterprise (CBE) certification registered in DC since 2004, alongside ABC STEP Platinum safety designation.
GCS-SIGAL generates revenue through competitive bidding on public sector RFPs and negotiated contracts with private clients. Notable projects include the WMATA Headquarters (325,000 SF joint venture with HITT), Duke Ellington School of the Arts (296,000 SF), Jackson-Reed High School (527,000 SF total), Residences at St. Elizabeths East (344,100 SF, 252 apartments), the Four Seasons Georgetown, The Jefferson Hotel, the Amazon/Prologis warehouse (129,416 SF), and the Whitman Walker Max Robinson Center (75,728 SF). Major customers span DC government agencies, universities (American University, NYU, Gallaudet), healthcare systems (Whitman Walker, Prenuvo), hospitality operators (Four Seasons, Jefferson), and enterprise tenants (DoorDash, JPMorgan Chase). Project-based pricing is not publicly disclosed.
GCS Sigal firmographics
Firmographics- Name
- GCS Sigal
- Legal name
- GCS, Inc.
- Website
- https://gcs-sigal.com
- Company type
- Private
- Founded year
- 1977
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- GCS-SIGAL is a privately held Washington, DC general contractor delivering commercial interiors, base building, multifamily housing, and historic preservation construction across the DC metro area for government, education, healthcare, hospitality, and private enterprise clients.
- Ownership category
- akta.pro rank
GCS Sigal industry classification
Industry- Product category
- Commercial Construction Services
- NAICS
- Industrial Building Construction (23621)
- SIC
- General Bldg Contractors - Nonresidential Bldgs (1540), General Bldg Contractors - Residential Bldgs (1520), Operative Builders (1531)
- akta.pro primary industry
- Commercial General Contracting (New Build) (IMAFAAAA)
- akta.pro secondary industry
- Public Works General Contracting (IMAFAAAG)
Keywords
Where GCS Sigal is headquartered
LocationHeadquarters
- HQ city
- Washington
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
GCS Sigal business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Supply Chain, Marketing or Sales, Technology or R&D, Infrastructure
Revenue model
- General Contracting Services: Full-service general contractor providing interior fit-outs, base building, renovations, historic preservation, adaptive reuse, and new construction projects for commercial, institutional, and government clients. Revenue generated through negotiated contracts and competitive bidding on construction projects.
- Design-Build Services: Integrated design and construction services under a single contract, providing collaborative project delivery from preconstruction through completion.
- Construction Management: Construction management services overseeing project planning, coordination, and execution on behalf of owners and developers.
Go-to-market motion2 records
Distribution channels4 records
Marketing channels6 records
GCS Sigal product offering
Product offeringCore offering
GCS-SIGAL is a Washington, DC-based general contractor providing full-service construction across commercial interiors, base building, multifamily developments, renovations, historic preservation, and adaptive reuse. The firm delivers projects via competitive bidding, negotiated contracts, and integrated design-build delivery for government, institutional, and private-sector clients throughout the DC Metro Area.
Product overview
GCS-SIGAL is a results-driven general contractor offering a unified portfolio of construction services organized around four core offerings: Commercial Interiors, Base Building & Multifamily, Renovations & Historic Preservation, and Adaptive Reuse. The company operates across nine distinct market sectors including Commercial Office, Healthcare & Life Sciences, Higher Education, Hospitality, Industrial, K-12 Education, Multi-Family Housing, Parks & Recreation, and Retail. The firm provides end-to-end project delivery including preconstruction/estimating, design-build, project management, and operational excellence methodologies. GCS-SIGAL does not offer a software product, API, or AI-powered platform—it is a traditional general contractor delivering construction services.
Differentiator
Problem solved
Functional benefit
Products and services
- Commercial Interiors Construction
- Base Building & Multifamily Construction
- Renovations & Historic Preservation
- Adaptive Reuse Construction
- Design-Build Project Delivery
- Construction Management Services
- Healthcare & Life Sciences Construction
- Higher Education Construction
- Hospitality Construction
- K-12 Education Construction
- Multi-Family Housing Construction
- Industrial Construction
- Parks & Recreation Construction
- Retail Construction
Quantifiable outcome
- Discovery Elementary School became the largest net-zero energy elementary school in the United States upon opening in 2016
- +3 more outcomes
Companies that use GCS Sigal
Customer profileNamed customers15 records
Segments9 records
Ideal customer profiles4 records
GCS Sigal technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
GCS Sigal partnerships and signals
Strategic signalPartnerships
Eleven partnerships are on record, tiered major joint venture, joint venture, operational, community partner and founding partner.
- HITTmajor joint ventureJoint venture partnership with HITT for construction of WMATA Headquarters - a 14-story, 325,000 SF facility in New Carrollton, MD. HITT serves as joint venture partner on this significant transit authority project.
- Davis Constructionmajor joint ventureJoint venture with Davis Construction for Whitman Walker Max Robinson Center interior fit-out - 75,728 SF four-floor health center on St. Elizabeths East Campus.
- RC Andersonmajor joint ventureJoint venture partnership with RC Anderson for Prologis Amazon Warehouse project - 129,416 SF facility with 33 acres of external development in District Heights, MD.
- Grunley Constructionjoint ventureJoint venture partnership with Grunley Construction for Dorothy I. Height Elementary School renovation and substantial addition.
- Grunley Constructionjoint ventureJoint venture partnership with Grunley Construction for St. Elizabeths Parking Garage - 750-space parking structure on historic St. Elizabeths East Campus.
- ProcoreoperationalConstruction management technology platform used for project management, communication, collaboration, and compliance tracking on construction sites.
- Compass AppoperationalPrequalification platform for trade partners and subcontractors to apply for consideration on GCS-SIGAL projects.
- FidelityoperationalFinancial wellness platform providing 401K management and NetBenefits tools for employee retirement programs.
- DC Department of Employment Servicescommunity partnerCollaboration with DC DOES to create employment opportunities for DC residents through subcontractor partnerships on projects.
- DC Students Construction Trades Foundationfounding partnerCo-founded in 2006 by Gerry Sigal to provide young people, especially from underserved communities, with skills and opportunities for construction industry careers. GCS-SIGAL continues to support this workforce development initiative.
- Academy of Construction & Designcommunity partnerPublic/private partnership created through DC Students Construction Trades Foundation to provide construction industry training and career pathways for DC youth.
Scale indicators5 records
Recent moves8 records
Expansion highlights5 records
GCS Sigal competitors and assessment
Company assessmentDirect peers
- Grunley Construction: DC-area general contractor of similar size and project mix; already a documented JV partner with GCS-SIGAL on Dorothy I. Height ES and St. Elizabeths parking, indicating directly overlapping capabilities in public, institutional, and historic work.
- HITT Contracting: Mid-Atlantic headquartered general contractor with comparable interiors, base building, and government portfolio; documented JV partner with GCS-SIGAL on WMATA HQ and a direct competitor on tenant improvement and institutional work in DC.
- Davis Construction: DC-area general contractor with strong institutional and healthcare portfolio; documented JV partner with GCS-SIGAL on the Whitman Walker Max Robinson Center and competes for similar mid-Atlantic public and private projects.
- Donohoe Construction: Washington DC-based general contractor of comparable regional scale and vertical mix (multi-family, hospitality, commercial, public), making it a direct competitor for the same DC metro project pool.
- Coakley & Williams Construction: Mid-Atlantic general contractor focused on institutional, healthcare, higher education, and public projects in DC/MD/VA—directly comparable in size, geography, and sector mix to GCS-SIGAL.
Broad incumbents
- Clark Construction Group: One of the largest DC-based general contractors, with substantially broader scale and portfolio; competes for the same major DC public works, higher-ed, healthcare, and commercial interiors work that GCS-SIGAL pursues.
- Whiting-Turner Contracting Company: National general contractor with a strong Mid-Atlantic/DC presence; directly competes for the institutional, higher-ed, healthcare, and commercial office work that anchors GCS-SIGAL's portfolio.
- Gilbane Building Company: Large national general contractor with deep Mid-Atlantic/DC operations across education, healthcare, hospitality, and public work; competes for the same institutional RFPs GCS-SIGAL targets.
- DPR Construction: National general contractor with strong DC presence in healthcare, higher education, and commercial interiors; competes for the same institutional and tech-driven interior fit-out work in the region.
- Balfour Beatty Construction: Large national GC with active DC office pursuing commercial, higher education, healthcare, and public-sector work; competes with GCS-SIGAL on regional institutional RFPs and larger public programs.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
GCS Sigal social profiles
Digital presenceGCS Sigal financial estimates
Financial estimateRevenue estimate
Valuation estimate
GCS Sigal leadership team
Management profileNumber of profiles
Profiles11 records
GCS Sigal funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
GCS Sigal M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about GCS Sigal
What does GCS Sigal do?
GCS-SIGAL is a Washington, DC-based general contractor providing full-service construction across commercial interiors, base building, multifamily developments, renovations, historic preservation, and adaptive reuse. The firm delivers projects via competitive bidding, negotiated contracts, and integrated design-build delivery for government, institutional, and private-sector clients throughout the DC Metro Area.
Is GCS Sigal a public or private company?
GCS Sigal is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was GCS Sigal founded?
GCS Sigal was founded in 1977. It employs 11 to 50 people.
Where is GCS Sigal based?
GCS Sigal is headquartered in Washington, United States, in the North America region.
How does GCS Sigal make money?
Three revenue lines are on record. General Contracting Services are the primary driver. The others are design-Build Services and construction Management.
Who are GCS Sigal's main competitors?
Direct peers on record are Grunley Construction, HITT Contracting, Davis Construction, Donohoe Construction and Coakley & Williams Construction. Broad incumbents are Clark Construction Group, Whiting-Turner Contracting Company, Gilbane Building Company, DPR Construction and Balfour Beatty Construction.
Does GCS Sigal have an API?
No public API is recorded for GCS Sigal.
What industry is GCS Sigal in?
GCS Sigal's product category is Commercial Construction Services. Its primary akta.pro industry code is IMAFAAAA, Commercial General Contracting (New Build), with a secondary code of IMAFAAAG, Public Works General Contracting. Its NAICS code is 23621 and its SIC code is 1540.