PLM

What PLM does

PLM, Inc. (Power Line Models) is a privately held electric power engineering consulting and design firm founded in 1986 in Hopkinton, Massachusetts and now headquartered in Marlborough, MA. The firm delivers professional engineering services across the full lifecycle of utility infrastructure, including substation, transmission line, and distribution system design delivered via both traditional Design-Bid-Build and turnkey EPC approaches, protection and control engineering for facilities ranging from 208V to 345,000V, system planning studies, power supply management, NERC compliance program development, technical training, and specialized investigations such as disturbance analysis and owner's engineer representation.

The company's core technology stack is centered on experienced senior-level engineering staff using conventional power systems software (including ASPEN for short-circuit analysis and modeling) rather than proprietary platforms. PLM has completed over 700 design projects and consulting assignments, manages more than 900 MW of load for utility clients across NYISO and ISO-NE energy markets, and has developed comprehensive NERC compliance plans for NPCC-footprint utilities that were recognized as industry Best Practices in 2011.

PLM generates revenue primarily through project-based professional services engagements and ongoing retainer arrangements for daily bid-to-bill power supply services with municipal electric utilities. Its customer base is heavily concentrated in public power systems and government agencies in New England and New York, supplemented by selective engagements in rail transportation, federal government, investor-owned utilities, independent power producers, and higher education. The firm operates with a small staff (11-50 employees) and has no disclosed external investors, parent company, or M&A activity.

Name

PLM

Legal name

PLM, Inc.

Website

https://plmnet.com

Company type

Private

Founded year

1986

Operating status

Operating

Headcount range

11–50 employees

Short description

PLM, Inc. is a privately held electric power engineering consulting and design firm founded in 1986, serving municipal electric utilities and government agencies in New England and New York with substation, transmission, distribution, NERC compliance, and power supply management services.

Ownership category

akta.pro rank

Product category

Electric Power Engineering Consulting

NAICS

Scientific Research and Development Services (5417)

akta.pro primary industry

Distribution Substations & Switching Stations (MV) EPC (EUAEACAC)

Keywords

• Electric power engineering
• Utility consulting services
• Substation design
• Power supply management
• NERC compliance consulting

Headquarters

HQ city

Marlborough

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Operations, Marketing or Sales

Revenue model

1. Engineering Consulting Services: Professional engineering and design consulting services for substation, transmission, and distribution projects. Services include traditional Design-Bid-Build and turnkey EPC projects. Revenue is generated through project-based consulting engagements with detailed engineering deliverables.
2. Power Supply Management Services: Ongoing power supply planning and daily bid-to-bill services for municipal electric utilities. Includes hourly load forecasting, resource optimization, scheduling with ISOs, and invoice verification services. Recurring retainer-based revenue model.
3. Technical Training: Technical training programs for operator and field personnel including protection and control training, relay schools, and substation communications courses.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

PLM is an electric power engineering consulting and design firm that delivers specialized engineering services to municipal electric utilities, public power agencies, and government clients in New England and New York. Its offering spans substation, transmission, and distribution system design; relay protection and control schemes from 208V to 345,000V; system planning studies; power supply management covering 900+ MW of load across NYISO and ISO-NE markets; NERC compliance program development for NPCC utilities; and technical training programs.

Product overview

PLM is an electric power engineering consulting and design firm offering professional services rather than a software product platform. The company provides a comprehensive suite of interconnected engineering services: System Design handles substations, transmission, and distribution projects; Protection & Control manages relay systems and coordination studies; Planning conducts system studies and load analysis; Power Supply & Rates oversees 900+ MW of load management in ISO markets; NERC Compliance ensures regulatory adherence; Technical Training builds client capability; and Additional Services address specialized investigations and engineering support. These services work together to deliver complete power system solutions from planning through compliance.

Differentiator

Problem solved

Functional benefit

Products and services

• System Design Engineering and design services for substations, transmission lines, and distribution systems for municipal electric utilities and government clients, delivered through both turnkey EPC and traditional Design-Bid-Build approaches, including construction phase support and as-built documentation.
• Protection & Control Evaluation, design, and implementation of relay and control protection schemes for generation, substation, distribution, and transmission facilities ranging from 208V to 345,000V, including protective relay settings, short-circuit studies, and coordination studies.
• Planning Services System planning studies for utility and institutional clients, including load flow analysis, system design criteria development, alternative evaluations considering permitting and interconnection requirements, and reliability assessments.
• Power Supply & Rates Power supply management services for over 900 MW of load across NYISO and ISO-NE markets, including long-run power supply planning and daily bid-to-bill services such as hourly load forecasting, resource optimization, ISO scheduling, and invoice verification.
• Technical Training Detailed technical training programs for utility operator and field personnel, including protection and control training, substation communications courses, relay schools for traction power systems personnel, and custom curriculum development.
• NERC Compliance Comprehensive NERC compliance program development and management for utilities in the NPCC footprint, including functional registration, Bulk Electric System determination, CIP analysis, audit preparation, and self-reporting/self-certification support.
• Additional Engineering Services Specialized engineering services including power system disturbance and mis-operation analysis, electrical accident investigations, owner's engineer representation, substation documentation review, regulatory compliance support, transformer failure analysis, and drawing scanning/conversion.

Quantifiable outcome

• Limited or no contractor change orders during construction due to detailed design packages
• +2 more outcomes

Named customers12 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Three partnerships are on record, tiered core and major.

• Independent System Operator of New England (ISO-NE)coreStrategic or Co-development PartnerPLM provides power supply management services for municipal electric utilities that are market participants of ISO-NE. Services include hourly load forecasting, resource optimization, and scheduling of transactions. PLM also provides invoice verification and settlement services with ISO-NE.
• New York Independent System Operator (NYISO)coreStrategic or Co-development PartnerPLM provides bid-to-bill services for municipal utilities that are direct customers of NYISO, including hourly load forecasting looking ten days forward, resource optimization, and scheduling with NYISO. Also provides invoice verification services.
• New York Municipal Power AgencymajorImplementation/ SI/ Consulting PartnerPLM retained to provide complete bid-to-bill services to the Agency and its 36 member systems, including daily operational and long-term bulk power supply planning services.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Emerging players

• Kleinfelder: Kleinfelder is an engineering consulting firm providing power, utility, and infrastructure services to municipal and investor-owned utilities, including substation and distribution engineering. A regional-to-nationally scoped peer that overlaps with PLM's municipal utility focus.

Broad incumbents

• Quanta Services: Quanta Services is a leading infrastructure services company with deep electric power utility engineering and construction capabilities through subsidiaries including POWER Engineers. Comparable to PLM in serving electric utilities across T&D, substation, and NERC-adjacent work.
• Tetra Tech: Tetra Tech is a global consulting and engineering firm providing power system planning, transmission, and distribution services to utilities. Overlaps with PLM in load flow studies, system planning, and substation-related engineering for municipal and IOU clients.
• TRC Companies: TRC Companies provides engineering, consulting, and construction management services to the power, utility, and energy markets, including substation design, protection and control, and grid modernization work. It competes with PLM for utility engineering and NERC compliance engagements.
• Burns & McDonnell: Burns & McDonnell is a large engineering, architecture, and consulting firm with a substantial T&D practice delivering substation, transmission, and power supply services. It is a broader incumbent than PLM but competes for the same municipal and investor-owned utility engineering engagements.
• Black & Veatch: Black & Veatch is a global engineering and construction firm with a significant power delivery practice delivering substation, transmission line, and protection engineering services to utilities. Competes with PLM on larger municipal and IOU projects.
• Sargent & Lundy: Sargent & Lundy is a long-established power engineering firm focused on power generation and T&D projects, providing consulting, design, and owner's engineer services to utilities. Comparable to PLM in substation and protection & control consulting for utilities.

Regional players

• National Grid (US Engineering/Consulting arm): National Grid owns and operates electric T&D infrastructure across New England and New York, mirroring PLM's core geographies. While primarily a utility operator, its engineering services and contracted engineering needs overlap directly with PLM's municipal and substation practice.
• Eversource Energy (Engineering Services arm): Eversource Energy operates the largest energy delivery company in New England and directly competes for in-house engineering resources relevant to PLM's transmission and substation work. Although a utility operator, its in-house and affiliated engineering teams overlap with PLM's regional service territory.

Direct peers

• POWER Engineers (now Quanta Engineering): POWER Engineers is an engineering consulting firm specializing in power delivery, substation, transmission, and protection & control services, directly comparable to PLM's system design and protection & control practices. Like PLM, it serves investor-owned utilities, municipal utilities, and cooperatives across North America.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/plm-inc

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about PLM