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The Allied Companies LLC · Washington, DC

Program Integration for Complex Infrastructure at Scale.

From multi-billion-dollar water infrastructure programs to mission-critical engineering in live operating environments, Allied delivers integrated engineering, construction coordination, and operational continuity.

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Delivered inside active, 24/7 operating facilities with zero margin for error

Eric Purnell · Managing Partner | 301-807-5787 · Email preferred

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Program Value Supported
$ 0 B+
People Served
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Featured Program Experience

Blue Plains Advanced Wastewater Treatment Plant

DC Water’s $3.8B Expansion · World’s Largest Advanced Wastewater Facility · 2.1M People Served
Embedded team coordinating engineering, construction, and operations across one of the most complex infrastructure programs in the United States.

Core Capabilities

What We Actually Do.

Allied operates at the program integration level — the critical layer where engineering, construction, and operations must stay aligned simultaneously across complex, multi-contract capital programs.

Program Integration

01

We coordinate multi-contract infrastructure programs across design engineers, construction teams, and regulatory stakeholders — keeping complex systems aligned from planning through delivery.

Engineering in Active Environments

02

We work inside live, mission-critical facilities where construction cannot interrupt operations — including large-scale wastewater treatment systems under continuous compliance.

Construction Phase Support

03

From RFIs and submittals to field issue resolution and outage coordination, we operate at the intersection of design and execution — where problems get resolved in real time.

Resilience & Infrastructure Security

04

We assess, design, and strengthen critical infrastructure systems against operational, environmental, and regulatory risk — hardening assets the world can’t afford to fail.
Combined vulnerability assessment and resilience frameworks for critical infrastructure — ICS and grid-friendly hardening, continuity
planning, and threat mitigation.

Where We Work

  • Water & Wastewater Infrastructure
  • Municipal & Public Utilities
  • Federal & Mission-Critical Facilities
  • Energy, Transportation & Industrial Systems

Signature Experience

Blue Plains
Advanced WWTP

Allied served as a core member of the program management team for DC Water’s $3.8B expansion of the world’s largest advanced wastewater treatment facility — coordinating across multiple PMCs, construction management contracts each valued in the hundreds of millions, and the most stringent environmental permits in the United States.
Project Size
$ 0 B
People Served
0 M
Years Program Support
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Allied Staff to Resident Advisor & Program Roles
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What Allied Delivered

  • Program-level coordination across multiple engineering disciplines and construction firms
  • Enhanced Nitrogen Removal (ENR) — advanced biological treatment and denitrification systems
  • Electrical modernization — substations, switchgear, arc flash audits, I&C systems
  • Major-scale engineering standards and procedures development
  • Construction-phase RFI resolution and field issue management in live operating environments
  • Integration with regional wet weather control and peak flow management systems
  • Outreach on time and on budget through economic downturns and a global pandemic

Expanding Portfolio

New markets.
Same standard.

Allied’s program integration expertise is being applied across new verticals and geographies. Full case studies are available in our capabilities statement.

Economic Development

Tribal Economic Development

Allied is embedded in chapter-independent capacity to support Tribal nation water system design, grants planning, and infrastructure development. Allied works with sovereign nations to build lasting infrastructure resilience.

  • Active Engagement

Land Development · Charlotte

York County, SC

Allied is supporting infrastructure development in the Charlotte MSA growth corridor — roads, utilities, stormwater — with unique integration linking capital planning to regional systems. Budget: $50M–$1B+ over 15–20 years.
  • Active: Budget Cost in Progress

Long-Range Support · Boston

Lexington, NC

Allied is supporting infrastructure development in the Lexington-Davidson MSA — 35 miles from Charlotte’s South End, 1 hour from Raleigh. Moderate price range, high growth potential. Budget: $50M–$1B+ over 15–20 years.
  • In Progress: Support Phase

Economic Development

Tribal Economic Development

Allied is embedded in chapter-independent capacity to support Tribal nation water system design, grants planning, and infrastructure development. Allied works with sovereign nations to build lasting infrastructure resilience.
  • See Service Line

Work with Allied

Ready to see the full picture?

Our capabilities statement covers our full project history, work methodology, program delivery methodology, and past performance at Blue Plains and beyond.

Request Capabilities Statement
Call Eric Directly

Eric Purnell · Managing Partner | 301-807-5787

© 2026 The Allied Companies LLC · Washington, DC

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