Suffolk Construction
Suffolk is a 44 year old, employee owned national general contractor building data centers and big projects.
On the record
Checkpoint: ENR Top 400 Contractors next annual update, which will confirm 2026 revenue and rank
The call
Suffolk's risk-bearing role in construction, backed by bonding and licensure, stays hard for software or bigger rivals to route around.
Suffolk Construction builds large projects like data centers and commercial buildings across the United States. It is hard to replace because the company has decades of relationships with clients, holds licenses and bonding in every state, and employs its own construction crews rather than outsourcing everything. Competitors like Turner Construction exist, but the industry is fragmented and Suffolk owns its own technology through an accelerator it runs. The biggest question for the next few years is whether the pipeline of data-center projects stays strong, whether government rules slow down AI-facility builds (one moratorium just started), and what happens when founder John Fish eventually steps back, since he personally owns the entire company and has not named a clear successor.
Why
01
AI pressure: AI-driven project tools like Procore AI, Autodesk Construction Cloud, Doxel. These automate scheduling and progress tracking but cannot hold the bonding, licenses, or trade labor Suffolk provides. Could AI do the core job? Unlikely.
02
Bigger players: Turner Construction. Turner sits above Suffolk on the ENR list and competes for the same large commercial and data-center jobs. Could a giant copy it? Probably.
03
What protects it. Surety bonding capacity, state licenses, self-perform trade crews, and John Fish's full ownership with no debt clock.
What would change this call
ENR's May 2027 Top 400 update shows Suffolk's rank or revenue falling year over year. Would indicate Suffolk is losing ground to peers like Turner or DPR.
Data-center moratoriums like Brookhaven's spread to other municipalities where Suffolk builds. Would show regulatory risk shrinking Suffolk's fastest-growing pipeline segment.
Suffolk reports a major project execution failure similar to the Titus case within the next year. Would suggest growth under the $10B push is straining quality control.
Data-center moratoriums like Brookhaven's spread to other municipalities where Suffolk builds. Would show regulatory risk shrinking Suffolk's fastest-growing pipeline segment.
Suffolk reports a major project execution failure similar to the Titus case within the next year. Would suggest growth under the $10B push is straining quality control.
Key numbers
- #23 on ENR Top 400, $5.33B 2025 revenue
- $110M contech venture fund closed
- 3,218 employees, up 24.5% since 2023
Named risks
- John Fish is 100% owner with no publicly named successor, creating key-person risk.
- Data-center regulatory pullback, e.g. Brookhaven's July 2026 18-month moratorium, threatens pipeline growth.
- Prior execution failure: court found Suffolk mismanagement caused 17-month project delay in 2024 ruling.
- Rapid headcount growth (24.5% in three years to March 2026) could strain quality control amid $10B target.
- Revenue figures are inconsistent across sources ($5.3B-$10B), complicating external verification of growth claims.
Rivals, as read in July 2026
| Rival | Direction | Evidence |
|---|---|---|
| Turner Construction | losing to | Turner ranked #1 on ENR 2026 Top 400 vs Suffolk's #23, as of 2026 |
| DPR Construction | contesting | National peer GC competing in mission-critical and data-center construction segments, 2026 |
| Clark Group | contesting | Named as top national GC incumbent alongside Suffolk on ENR 2026 rankings |
| Whiting-Turner Contracting | contesting | Cited as comparable-scale national peer in ENR 2026 Top 400 list |
Questions people ask
- Is Suffolk Construction profitable?
- Suffolk is privately held with no public earnings disclosure. ENR's 2026 Top 400 lists 2025 construction revenue near $5.33 billion (rank #23), while Forbes-sourced figures cite $7.4-7.5 billion enterprise-wide. No audited profit margin has been published as of 2026.
- Who owns Suffolk Construction?
- Chairman and CEO John F. Fish owns 100% of Suffolk, having bought out his father Edward Fish Sr.'s remaining stake in 2006. Forbes estimated Fish's net worth at $3.6 billion, tied almost entirely to his full Suffolk ownership, as of the most recent bio update.
- Could AI replace Suffolk Construction?
- Unlikely soon. Suffolk's core value is bonded liability, state licensure, and self-perform trade labor, none of which AI can assume. In June 2026 Suffolk launched 'Jobsite of the Future,' embedding AI engineers for design-clash detection and procurement tracking, as a workflow tool, not a labor replacement.
- Who is Suffolk Construction's biggest competitor?
- Turner Construction ranks #1 on ENR's 2026 Top 400 Contractors list versus Suffolk's #23 (up from #28 the prior year). DPR Construction, Clark Group, and Whiting-Turner are also cited as national peers competing in the same segments.
- Is Suffolk Construction expanding overseas?
- Yes. Suffolk opened a Bangalore, India design-support office announced internally in March 2026, its first substantial offshore staffing move, per Boston Globe reporting dated 2026-03-16. The office supports design and drafting rather than local construction delivery.
- Is it safe to take a job at Suffolk Construction?
- Suffolk's headcount grew to roughly 3,218 employees by March 2026, up 24.5% from 2,585 in 2023 per Revelio Labs, and it carries no VC or PE debt load. However, a 2024 court ruling (Berkley Insurance v. Suffolk) found project mismanagement caused a 17-month delay, a reputational flag.
Timeline
- 2026-07-23Brookhaven, NY imposes 18-month data center construction moratorium amid community opposition
- 2026-06-17Suffolk launches 'Jobsite of the Future,' embedding AI engineers on construction sites
- 2026-03-16Suffolk opens Bangalore, India design-support office, first major offshore staffing move
- 2026-03-12Suffolk homepage claims $10 billion annual revenue (company claim, unverified)
- 2026ENR 2026 Top 400 ranks Suffolk #23, up from #28 prior year
- 2025-11-20Suffolk holds sixth annual BOOST contech accelerator Demo Day
- 2024-07Court rules in Berkley Insurance v. Suffolk that mismanagement caused 17-month project delay
- 2023-07Suffolk Technologies closes $110 million inaugural contech venture fund
- 2006John F. Fish buys out father Edward Fish Sr.'s remaining stake, becoming 100% owner
- 1982Suffolk Construction founded in Boston by Edward Fish Sr., leadership passed to son John F. Fish
Revision history
24 July 2026
First assessed. Hard to displace. The text above is fixed as of this date and is not edited afterwards.
In the same band
Sources
- Suffolk Construction Company
- John Fish (businessman)
- ENR Top 400 Contractors (2025 data) (2025-05-26)
- Suffolk Construction (2026-03-12)
- Mission Critical (2025-10-02)
- Suffolk Construction Number of Employees 2026 (2026-06-29)
- Suffolk Construction heads to India for staff support (2026-03-16)
- Suffolk to embed AI engineers within construction projects (2026-06-17)
- Suffolk touts its 2025 contech startup picks (2025-12-03)
- ENR 2026 Top 400 Contractors 1-100
- Brookhaven sets 18-month data center moratorium among calls for permanent ban (2026-07-23)
- Lessons Learned from the Recent Ruling on Contractor Responsibilities