Electrical, Communications & Security Services | Plexus Group
Mid-Atlantic & DMV Region · Division 26 · 27 · 28

From the service entrance to the last data drop —
and everything in the ground between.

Most projects coordinate three or four separate subcontractors to deliver power, communications, life safety, and security. Plexus Group delivers all of it under a single contract, a single schedule, and a single point of accountability — across Maryland, Virginia, Washington D.C., Pennsylvania, and Delaware.

Since 1995
MDOT Certified MBE
Minority Woman-Owned
IBEW Signatory Contractor
Licensed, Bonded & Insured · Mid-Atlantic Region
Division 26

Electrical Construction

The Need

Power is the constraint on nearly every facility upgrade. Adding capacity, feeding new equipment, and bringing older distribution up to current code is where projects get expensive and schedules get long.

What We Deliver
  • Feeders and branch circuits
  • Panel boards, transformers, and control panels
  • Switchgear installation
  • Generators and emergency power
  • Lighting and lighting controls
  • Building automation and controls
  • Temporary power
  • Electrical wiring, testing, and equipment connections

Why clients bring this to us: Our electricians and our communications technicians work for the same company and sit in the same coordination meeting. Power and pathway are planned together, which is where the schedule is won.

Division 27

Structured Cabling & Fiber Optics

The Need

Every system in a modern facility — voice, wireless, cameras, access control, sensors, building controls — rides on the same cabling plant. When that plant is undersized or undocumented, every system inherits the problem.

What We Deliver
  • Structured cabling design, installation, certification, and maintenance — copper and fiber
  • Backbone and horizontal distribution
  • Fusion splicing, termination, and bidirectional OTDR certification
  • Telecommunications room buildout, racks, cable tray, and grounding
  • Wireless integration, distributed antenna systems (DAS), and RF infrastructure
  • Test results, labeling schedules, and as-built documentation at closeout

Why clients bring this to us: We install to the standard, test to the standard, and hand over the documentation that proves it — the difference between a cabling plant that serves the building for twenty years and one that gets replaced in five.

Division 28

Fire Alarm & Life Safety

The Need

Life safety systems cannot go dark. Replacing or modernizing fire alarm in a building people are living, learning, or working in demands phasing, discipline, and zero tolerance for gaps in coverage.

What We Deliver
  • Fire alarm system installation and modernization
  • Emergency voice evacuation systems
  • Phased zone-by-zone cutover with the existing system kept live and cross-tripped
  • Fire alarm replacement in occupied residence halls and academic buildings
  • Integration with existing building systems

Why clients bring this to us: We have replaced fire alarm systems in occupied university dormitories without taking the building out of service — and delivered on compressed academic calendars.

Division 28

Electronic Security & Access Control

The Need

Security systems fail during installation more often than in operation — and they fail for infrastructure reasons: no pathway, no power at the door, no network drop, no coordination with the door hardware supplier.

What We Deliver
  • Video surveillance and CCTV, including camera and enclosure installation
  • Access control systems
  • Intrusion detection
  • Integration with existing building and security platforms
  • Commissioning, owner training, and device-level documentation

Why clients bring this to us: We run the conduit, pull the cable, land the power, and terminate the device. There is no gap between trades for the project to fall into.

ITS

Intelligent Transportation Systems

The Need

Roadway, tunnel, and tolling technology has to be installed and relocated while traffic keeps moving and the systems stay online.

What We Deliver
  • Intelligent transportation systems (ITS) infrastructure
  • Electronic toll collection and free-flow tolling infrastructure
  • Red light and school zone speed enforcement camera infrastructure
  • PLC and RCU design, installation, and submittal packages
  • Industrial electrical for tunnels, bridges, and roadside systems
  • Work on active corridors under maintenance of traffic, including night and off-peak shifts

Why clients bring this to us: We have supported automated enforcement programs across multiple Mid-Atlantic jurisdictions for two decades, and we have kept live roadside technology in service through major tunnel and interstate construction.

Outside Plant

Outside Plant & Underground Construction

The Need

Campus, corridor, and interbuilding connectivity starts in the ground. When underground work is brokered to a second-tier subcontractor, the schedule belongs to someone else.

What We Deliver
  • Outside plant cable construction
  • Directional boring and trenching
  • Conduit, duct bank, handholes, and manholes
  • Concrete pole and equipment foundations, independently tested and certified
  • Pole, gantry, and roadside structure support work

Why clients bring this to us: We own the equipment to dig. Underground work is self-performed, not handed off.

Audio-Visual

Audio-Visual & Communications Systems

What We Deliver
  • Conference and collaboration room audio-visual systems
  • Digital signage and display infrastructure
  • Public address and paging systems
  • Pathway, power, and cabling for AV systems

Why clients bring this to us: An AV system is mostly infrastructure, and infrastructure is what we do every day.

Design

Technology Design & Engineering

What We Deliver
  • Network and communications systems design
  • IT infrastructure design and integration
  • Network engineering, security, and management
  • CAD and construction drawings
  • PLC and controls design
  • Equipment surveys and existing-conditions assessments
  • Design-build delivery

Why clients bring this to us: When the same company designs and installs, the drawings reflect how the system will actually be built — and constructability problems are solved on paper instead of in the field.

Advisory & Technical Support

Program & Technical Support Services

Some clients don’t need another subcontractor. They need experienced technical judgment — someone who knows what to look for before a scope is awarded, a submittal is approved, or a project closes out. Plexus Group provides this advisory capability across the Mid-Atlantic Region.

  • Program and project management for technology-scope projects
  • Construction management and owner’s representative support
  • Low-voltage scope coordination across multiple trade subcontractors
  • Independent design, specification, and submittal review
  • RFP and scope-of-work development support
  • Proposal and technical submission review
  • Commissioning, testing, and closeout oversight
  • Technical personnel provisioning to agency and prime engineering teams
  • Field supervision augmentation

We have provided technical personnel, equipment surveys, document review, and RFP design and proposal review services in support of a Maryland statewide transportation authority program. Our advisory work is grounded in decades of building the same systems we review.

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Ongoing Support

Service, Maintenance & On-Call Support

Infrastructure does not announce its decline. Devices fail one at a time, documentation goes stale, and the knowledge of what’s behind the wall leaves with the facilities manager who retires. The cost shows up later, as emergency work at emergency rates.

We already hold on-call and maintenance contracts with public school systems and municipal clients across the Mid-Atlantic Region. A maintenance relationship turns an unpredictable repair budget into a predictable operating line — with a partner who already knows the facility.

What We Deliver
  • On-call electrical and low-voltage service
  • Installation, maintenance, and repair contracts
  • Emergency response with designated PM and lead technicians
  • Moves, adds, and changes
  • Preventive maintenance of installed systems
  • Updated documentation as systems change

Not sure which scope you actually need?

Send us the drawings, the bid package, or a description of what isn’t working. We’ll tell you what the project actually involves — including the parts nobody has priced yet. Serving MD · VA · DC · PA · DE.

Since 1995
MDOT Certified MBE
Minority Woman-Owned
IBEW Signatory
Licensed, Bonded & Insured · Mid-Atlantic Region