What Partner Engineering & Science does

Partner Engineering & Science is a privately held, multidisciplinary engineering and environmental consulting firm headquartered in Torrance, CA, founded in 2007 to serve the commercial real estate (CRE) due diligence market. The company delivers Phase I/II/III Environmental Site Assessments, Property Condition Assessments, Seismic Risk Assessments, ALTA/NSPS Land Title Surveys, Construction Risk Management (Document & Cost Review, Contractor Evaluation, Progress Monitoring, Funds Control, Completion Commitment), Geotechnical Consulting, Industrial Hygiene, and ESG+R/climate resilience services to CRE equity investors, construction lenders, property owners, developers, corporate occupiers, and affordable housing developers. It operates a portfolio of branded divisions and subsidiaries including Partner Energy (energy and sustainability), Partner Valuation Advisors, Partner SiteLynx Technology, Nevada Construction Services, and Saint Vincent, LLC (managing general agent for SureBuild construction completion insurance), supported by 1,500+ professionals across 40 offices in the U.S., Canada, the UK, Netherlands, Germany, Poland, Israel, and the UAE.

The firm's delivery layer rests on SiteLynx, a proprietary cloud-based report ordering, tracking, delivery, and analysis dashboard, layered atop an internal ESG+R benchmarking dataset covering 5,500+ buildings and 1,000+ ESG checklists. Service revenue is generated through project-based, fee-for-service consulting engagements priced on a quote basis per engagement; the go-to-market is relationship-led enterprise sales executed via national client managers who serve as a single point of contact across service lines, with no subscription or recurring pricing tier disclosed. Cumulative output of 100,000+ ESAs, 13,000+ seismic assessments, and 60,000+ affordable housing projects, combined with 13 consecutive years on ENR's Top 500 Design Firms (rising to #109 in 2026 and debuting at #93 on the Top 100 Pure Designers list), positions Partner as one of the largest and best-known third-party physical due diligence providers in the U.S., reportedly touching an estimated 1 in 5 CRE transactions.

Name

Partner Engineering & Science

Legal name

Partner Assessment Corporation dba Partner Engineering and Science, Inc.

Website

http://www.partneresi.com/

Company type

Private

Founded year

2007

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Partner Engineering & Science is a privately held, multidisciplinary engineering and environmental consulting firm delivering Phase I ESAs, property condition assessments, construction risk management, ESG, and valuation services to commercial real estate investors, lenders, and developers across 40 global offices.

Ownership category

akta.pro rank

Product category

Commercial Real Estate Engineering & Environmental Consulting

NAICS

Architectural, Engineering, and Related Services (5413), Environmental Consulting Services (54162), Engineering Services (541330), Environmental Consulting Services (541620)

SIC

Services-Engineering Services (8711), Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

akta.pro secondary industries

Geotechnical & Subsurface Engineering Consulting (BPAHAIAB), Real Estate Development & Feasibility Advisory (Highest-and-Best-Use, Entitlements Support) (BPAJANAC)

Keywords

• Environmental site assessments
• Property condition assessments
• Construction risk management
• Engineering consulting services
• ESG consulting services

Headquarters

HQ city

Torrance

HQ country

United States

HQ region

North America

Offices11 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Professional Consulting Services: Fee-for-service consulting engagements including Phase I Environmental Site Assessments, Property Condition Assessments, Seismic Risk Assessments, Zoning Reports, ALTA Land Title Surveys, Construction Risk Management services, Geotechnical Consulting, Building Systems Consulting, Energy and Sustainability Consulting, and Site Civil Engineering. Revenue is project-based and transactional rather than recurring subscription.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Partner Engineering & Science is a national engineering, environmental, and construction consulting firm providing due diligence, risk management, and sustainability services for the commercial real estate industry. Core offerings include Phase I and Phase II Environmental Site Assessments, Property Condition Assessments, Construction Risk Management (Document & Cost Review, Contractor Evaluation, Funds Control, Completion Commitment), Seismic Risk Assessments, Geotechnical Services, ALTA/NSPS Land Title Surveys, ESG+R Consulting, and valuation services delivered through national client managers. Services are sold project-by-project on a fee-for-service basis to real estate investors, lenders, developers, and corporate occupiers.

Product overview

Partner Engineering and Science, Inc. operates as a multi-service engineering, environmental, and construction consulting platform with a portfolio of branded divisions and subsidiaries. The core offering includes Property Condition Assessments, Environmental Site Assessments (Phase I/II), Construction Risk Management services (Document & Cost Review, Contractor Evaluation, Funds Control, Completion Commitment), ESG Consulting, and Geotechnical Services. The company markets SiteLynx, a proprietary cloud-based report ordering and delivery platform, alongside specialized divisions including Partner Energy (sustainability/renewable energy), Partner Valuation Advisors (appraisal), Partner Property Consultants (Europe/EMEA), and Partner Assessment Corporation (Canada). The company also offers location-specific subsidiaries for Nevada Construction Services, Partner Residential Consultants, PSG Engineering and Geology (NY), and Partner Engineering North Carolina PLLC. Services span due diligence, risk management, engineering design, environmental consulting, energy/sustainability, land surveying, and valuation across commercial real estate transactions.

Differentiator

Problem solved

Functional benefit

Brands

• Partner Energy: Division providing energy, sustainability, and resilience consulting services
• Partner Valuation Advisors
• Partner Property Consultants
• Partner Assessment Corporation
• Partner SiteLynx Technology
• Partner Residential Consultants
• Nevada Construction Services
• Saint Vincent, LLC
• PSG Engineering and Geology, DPC
• Partner Engineering North Carolina, PLLC

Products and services

• SiteLynx Cloud-based report ordering, delivery, and analysis dashboard that enables clients to order environmental and engineering reports, track project status, and access deliverables online. Used by commercial real estate clients to streamline due diligence workflows.
• Property Condition Assessment Reports Comprehensive assessments evaluating the physical condition of commercial properties including structural, mechanical, electrical, plumbing, and building envelope systems. Sold to equity investors, lenders, and property owners conducting pre-acquisition and asset management due diligence.
• Capital Program Management Management and oversight of capital improvement programs for commercial real estate portfolios. Targets corporate occupiers, institutional owners, and developers with multi-site capital planning needs.
• Seismic Risk Assessments Evaluation of seismic risk and structural vulnerability for commercial properties, including Probable Maximum Loss (PML) studies. Sold to commercial real estate investors, lenders, and owners in seismic-prone markets.
• Structural Engineering Engineering analysis and design services for building structures, including forensic structural evaluations and retrofit design. Provided to building owners, developers, and legal counsel requiring structural expertise.
• Building Envelope Consulting Consulting services for building exterior systems including walls, windows, roofing, and waterproofing. Targets property owners, developers, and lenders requiring facade and envelope condition assessment.
• Document & Cost Review Review of construction documents, budgets, and cost estimates to verify feasibility and completeness prior to loan closing. Primarily sold to construction lenders as part of pre-funding risk assessment.
• Contractor Evaluation Assessment of contractor qualifications including financial stability, experience, capacity, and track record. Sold to construction lenders and owners vetting construction firms before project award.
• Construction Progress Monitoring On-site inspections to verify project progress matches funding requests and construction documents. Sold to construction lenders to validate draw requests.
• Funds Control / Funds Disbursement Management and auditing of construction fund disbursements to ensure proper allocation and lien-free completion. Sold to construction lenders managing loan disbursements.
• Completion Commitment Structured plan to complete construction projects if contractors default, providing replacement contractor arrangements. Sold to construction lenders to mitigate contractor default risk.
• Phase I Environmental Site Assessment Due diligence assessment identifying potential environmental contamination risks at commercial properties, conducted to ASTM E1527 standard. Sold to commercial real estate investors, lenders, and owners as the standard pre-acquisition environmental screen.
• Phase II Environmental Site Assessment Subsurface investigation services to characterize environmental contamination identified in Phase I ESAs. Sold to property owners, developers, and lenders requiring quantitative contamination data.
• ESG Consulting Environmental, Social, and Governance consulting services for real estate portfolios, including sustainability strategy, reporting, and benchmarking. Sold to institutional investors, REITs, and corporate occupiers subject to ESG disclosure requirements.
• Climate Hazard & Property Resilience Assessment and planning services for climate-related physical and transition risks to commercial real estate assets. Sold to investors, lenders, and owners needing climate risk disclosure under SEC and other regulatory regimes.
• Green Building Certifications Consulting and project management for LEED, Energy Star, Green Globes, and other green building certification programs. Sold to building owners, developers, and corporate occupiers pursuing sustainability certification.
• Solar Consulting Consulting services for solar energy projects, including feasibility, design review, and converting brownfields into solar developments. Sold to developers, owners, and investors evaluating renewable energy projects.
• ALTA/NSPS Land Title Surveys Land title surveys meeting American Land Title Association and National Society of Professional Surveyors standards. Sold to title companies, lenders, investors, and attorneys requiring standardized commercial property surveys.
• Geotechnical Services Site selection, feasibility studies, new development services, subsurface investigations, and construction inspections. Sold to developers, owners, and lenders requiring ground-condition expertise.
• Industrial Hygiene Services including asbestos, lead, radon, and mold assessment plus abatement oversight. Sold to property owners, facility managers, and developers requiring environmental health and safety compliance.
• Health & Safety Compliance Compliance consulting for occupational health and safety regulations, including EHS audits. Sold to property owners, facility operators, and corporate occupiers needing regulatory compliance support.
• Partner Property Consultants (EMEA Services) European subsidiary offering Phase 1 Environmental Assessments, Building Surveys, Construction Monitoring, ESG Advisory Services, and Energy Performance Certificates across the UK, Poland, Germany, Netherlands, Israel, and UAE. Sold to European commercial real estate investors, lenders, and owners.
• Partner Energy (Energy & Sustainability Consulting) Division of Partner providing energy, sustainability, and resilience consulting services including building efficiency engineering, green building certifications, solar consulting, renewable energy consulting, multifamily green financing, and LIHTC energy services. Sold to building owners, developers, and affordable housing sponsors.
• Partner Valuation Advisors Affiliate company providing appraisal and valuation services for commercial real estate. Sold to lenders, investors, and owners requiring property valuation opinions.

Quantifiable outcome

• 80% of all construction defaults occur due to payment-related issues and delays - CRM services significantly reduce this risk
• +2 more outcomes

Named customers1 record

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators24 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• EBI Consulting: EBI Consulting provides environmental, engineering, and sustainability consulting for commercial real estate, with a service portfolio directly overlapping Partner's Phase I ESAs, PCAs, ALTA surveys, and ESG consulting. Strong national footprint makes it a direct competitor in the CRE due diligence market.
• EMG (a Gordian Group company): EMG is one of the closest direct competitors to Partner ESI, providing property condition assessments, environmental consulting, and capital project services for commercial real estate clients across the U.S. Both firms serve lenders, owners, and investors with overlapping CRE due diligence service lines.
• Hillmann Consulting: Hillmann Consulting provides property condition assessments, environmental due diligence, and construction risk management for commercial real estate owners, lenders, and investors. Closely comparable to Partner in service mix, customer base, and East Coast U.S. presence.
• Whitestone Associates: Whitestone Associates is a national provider of environmental and geotechnical engineering consulting for commercial real estate, including Phase I/II ESAs, PCAs, and ALTA surveys. Directly comparable to Partner's core environmental and engineering due diligence services.
• AEI Engineering (now Bowman): AEI Engineering was a well-known direct competitor in CRE property condition assessments and due diligence before being acquired by Bowman. It competed head-to-head with Partner for equity-level PCA work, particularly for institutional investors.

Broad incumbents

• Terracon Consultants: Terracon is one of the largest U.S. engineering consulting firms providing geotechnical, environmental, construction materials, and facilities services. It is a broader incumbent that overlaps with Partner on environmental site assessments, geotechnical, and building sciences work, but serves a wider range of end markets beyond CRE.
• ECS Group of Companies: ECS Group is a large national engineering consulting firm specializing in geotechnical, environmental, construction materials, and facilities engineering. Overlaps significantly with Partner's geotechnical and environmental services but operates as a broader, multi-market engineering platform.
• WSP USA: WSP is a global engineering professional services firm with substantial U.S. operations in property and buildings, environment, and earth/water practices. While much larger and more diversified, WSP competes with Partner for large CRE environmental and engineering engagements, particularly for institutional clients.
• Stantec: Stantec is a global engineering, architecture, and environmental consulting firm with a strong U.S. buildings and environmental practice. It overlaps with Partner in environmental site assessments, building sciences, and sustainability consulting for real estate, though it serves a much broader set of end markets.
• Bureau Veritas North America: Bureau Veritas is a global testing, inspection, and certification (TIC) firm with U.S. operations spanning building infrastructure, environmental services, and asset integrity. Comparable in providing environmental and engineering compliance services to CRE owners, though much larger and more diversified.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/PartnerEsi
• YouTubeyoutube.com/user/partnerengineering/playlists
• Facebookfacebook.com/107586855937581
• LinkedInlinkedin.com/company/partner-engineering-&-science-inc.
• Instagraminstagram.com/partneresi

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Subsidiaries25 records

Funding overview

Funding rounds

Investors

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

M&A1 record

Investments

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

Frequently asked questions about Partner Engineering & Science