On today’s commercial construction projects, safety failures rarely come down to a single worker ignoring a rule. More often, they occur at the seams—when multiple trades overlap, schedules compress or responsibilities blur.
Multi-employer jobsites are now the norm, especially for small and mid-size commercial builders. That complexity means coordination is as important to safety outcomes as any toolbox talk, policy or procedure.
Against OSHA has long recognized that modern construction sites involve multiple employers working simultaneously. Under OSHA’s Multi-Employer Citation Policy, responsibility for jobsite accidents is shared across four defined roles:
1. Creating employer – whose actions or omissions created the hazard.
2. Exposing employer – whose workers are exposed to the hazard.
3. Correcting employer – who is responsible for fixing or abating the hazard.
4. Controlling employer – who has authority to require others to correct hazards.
A builder, contractor or subcontractor can occupy more than one of these roles at a time. For general contractors and construction managers, the most relevant designation is often the controlling employer.
OSHA expects controlling employers to exercise reasonable care in preventing and correcting hazards, even when the hazard was created by a subcontractor. Importantly, contract language does not override OSHA’s expectations: In accident investigations—and often in subsequent litigation—responsibility is assessed based on actual control and influence on the jobsite, even when another party contractually assumed safety duties.
For builders, this means that coordination is not optional or secondary. OSHA enforcement actions routinely cite failures to coordinate safety expectations, monitor compliance or intervene when known hazards persist—even if the issue results from another employer’s workers.
Coordination failures tend to follow predictable patterns. One of the most common is trade overlap without updated hazard reviews.
When multiple trades work in the same area, new hazards are introduced that weren’t present when each trade worked independently. Schedule compression is another major factor. When timelines tighten—whether caused by financial pressure, change orders or weather—work is often re-sequenced quickly, sometimes without fully reassessing safety impacts.
Inconsistent safety standards among subcontractors also play a role. Even when a general contractor has clear expectations, subcontractors may arrive with different training practices, PPE norms or hazard controls. Without active coordination, those differences can undermine site-wide safety efforts.
For example, a 2018 construction fatality investigation in Oregon found that the fatal electrocution of a subcontracted lighting technician resulted from a series of issues directly related to the presence of multiple employers without clear oversight and coordination among them.
The worker was killed while replacing fluorescent light ballasts on fixtures that hadn’t been deenergized. It might seem like an obvious case of an individual failing to follow proper lockout-tagout (LOTO) procedures.
Here’s what the investigation found:
The prime contractor was from out of state and subcontracted a staffing agency to provide lighting technicians. The job was to replace fluorescent fixtures with LED fixtures in a big-box store.
Those workers had come to the staffing agency only recently through acquisition of a different out-of-state staffing agency—a purchase that established a new electrical services division.
The safety procedures or licensing status of the acquired company were not evaluated as part of the purchase process.
The electrocuted worker had been on the job for three weeks and had not been formally trained as a lighting technician. The employee handbook he received from his new employer hadn’t been updated to include safety policies for working on electrical.
He and other team members weren’t trained in LOTO procedures.
The workers received incorrect information about the lighting system they were working on, leading them to leave it energized while they worked.
A supervisor with appropriate training was not on the jobsite, and even after the electrocution, the hazardous condition was allowed to persist.
Many coordination failures can be mitigated before work begins. Effective pre-construction safety planning sets expectations early and establishes clear lines of authority.
Pre-job safety coordination meetings are a foundational step—allowing the various contractors on a job to review site-specific hazards, discuss overlapping work phases and clarify how safety responsibilities will be shared.
Site-specific safety plans—rather than generic templates—help ensure that expectations reflect actual job conditions. “The site-specific safety plan should tie specific activities/conditions to hazards, involve all contractors and subcontractors who work on the project, and be updated regularly to incorporate changes to the project conditions and hazard exposures,” offers a 2023 article for AGC (Associated General Contractors of America) by construction lawyer Jeanne M. Harrison, who is now managing partner of Anderson & Harrison law firm in Nashville.
Defining safety authority is equally important. Workers and supervisors should know who has stop-work authority and what the process is to escalate safety concerns.
Subcontractor safety prequalification reduces risk by identifying gaps in training, experience or past performance before crews arrive on site.
Even strong pre-construction planning must be reinforced daily. Active jobsites change constantly, and safety plans must evolve with them.
Daily coordination briefings help align supervisors on which trades are working where, and what new hazards may be present.
Updating site-specific safety plans as work progresses ensures that controls remain relevant.
Visual controls, such as clearly marked access zones and work boundaries, help prevent unintended trade overlap.
Reinforcing stop-work authority at all levels signals that safety is not subordinate to schedule pressure.
OSHA’s Recommended Practices for Safety and Health Programs emphasize ongoing communication, worker involvement and continuous improvement as core elements of effective safety management.
Effective safety accountability does not rely on punishment alone. Research reported by Safety+Health magazine finds that blame-focused cultures discourage reporting and hide near misses that could prevent future incidents.
“Typically, a safety failure is a chain of events,” offers Piyush Sharma, a quality control engineer and contributor to the National Safety Council Journal of Safety Research. “Why do we need to assign blame?”
Instead, high-performing jobsites emphasize clear expectations, consistent follow-through and shared responsibility. Also, they don’t stop at reporting accidents; they also report near misses—analyzing them for systemic issues that could result in a future accident.
Finally, clear escalation paths for workers at every level ensure that hazards are addressed promptly, without fear of retaliation.
Owners and insurers increasingly expect documented coordination on multi-employer jobsites. Safety performance affects premiums, claims history, project schedules and litigation exposure.
“Construction projects often involve multiple parties, and the way one subcontractor manages risk can affect others,” notes a 2025 report from Marsh global risk management firm. “Effective coordination and communication with the general contractor and other subcontractors can reduce delays, disputes, and claims. Collaborative risk management initiatives enable all parties to share responsibility for safety and other critical issues.”
For builders and contractors, subcontractor coordination is no longer just a compliance requirement. It’s a practical tool for reducing risk, protecting schedules and controlling costs. Jobsites that treat coordination as a core management function rather than an afterthought are better positioned to win projects and deliver projects safely and reliably in an increasingly complex construction environment.
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