- LST jobs sit inside commercial diving companies, saturation systems, and offshore support vessels, not general diving shops.
- ADCI requires 100 field days as an assistant LST before an employer will consider you for a lead role.
- The credential is issued through ADCI's Skill N Depth system and is valid for five years before renewal exams are required.
- Equipment-specific training and a personal logbook matter as much to hiring managers as the exam score itself.
Who Actually Hires LSTs
Life Support Technician jobs don't show up on generic job boards the way "diver" or "technician" postings do. Employers are almost always diving contractors registered with the Association of Diving Contractors International (ADCI), and they're hiring for saturation diving support, not recreational or scientific diving. If you're researching LST jobs for the first time, it helps to understand this narrow but stable niche before you spend money on exam prep.
The companies that hire LSTs typically fall into a few categories:
- Offshore diving contractors supporting oil and gas platforms, pipeline work, and subsea construction.
- Saturation diving companies running bell systems and life support chambers for deep-water projects.
- Marine construction firms that maintain in-house diving divisions for underwater infrastructure work.
- Specialty subsea service providers contracted for inspection, repair, and salvage operations.
Because ADCI membership and credentialing are so central to this industry, most hiring managers already expect candidates to hold or be actively pursuing the LST credential before they'll even schedule an interview for a lead position. If you're unclear on what the letters actually represent, our companion piece on what LST stands for is a quick primer before you go further.
Common Job Titles and What They Mean
Job postings rarely say "Life Support Technician" in isolation. You'll see a range of titles depending on the contractor, the project scope, and where you sit in the experience ladder.
Assistant Life Support Technician
This is the entry point almost everyone starts from. You work under a certified LST, logging the field days required before you can sit for full certification.
- Counts toward the 100 field days ADCI requires for LST eligibility
- Focuses on monitoring, gas panel operation, and chamber support under supervision
- Builds the logbook entries examiners and employers will later verify
Life Support Technician (LST)
The fully credentialed role, responsible for operating and monitoring saturation systems, gas management, and chamber safety during live diving operations.
- Requires the completed ADCI exam plus documented field experience
- Often paired with equipment-specific certifications from the manufacturer of the system in use
- Frequently the gatekeeper role for larger saturation projects
Saturation Systems Supervisor / Superintendent
A career step above LST, typically requiring years of field LST experience plus supervisory training.
- Oversees multiple LSTs and dive teams across a project
- Reports directly to offshore management on system status and safety compliance
- Usually reserved for those who've renewed their LST credential multiple times
If any of this terminology feels unfamiliar, it's worth stepping back to our overview of what an LST actually is and how the role fits into a commercial diving crew.
What the Job Looks Like Day to Day
LST work is technical, procedural, and safety-critical - closer to industrial systems operation than diving itself. Employers expect candidates to already understand diving physics and physiology, basic saturation theory, and safe operating procedures before setting foot on a job site, because there's little room to learn these concepts live during an active dive.
Concrete tasks an LST is expected to handle include:
- Monitoring and adjusting gas mixtures inside saturation chambers
- Tracking depth, pressure, and decompression schedules against the current 6.5 Edition International Consensus Standards
- Operating chamber controls and life support equipment specific to the system installed on that vessel or platform
- Responding to emergency scenarios using valid CPR and first aid training
- Maintaining accurate logs that document every shift, equipment check, and incident
This is exactly why the exam and the field-day requirement exist together - a passing score alone doesn't demonstrate you can run a live chamber safely. For a full breakdown of what's actually tested, see our LST exam domains guide.
Key Takeaway
Employers evaluate LST candidates on three things simultaneously: exam completion, verified field days, and equipment-specific training. Missing any one of these will stall a hire even if the other two are strong.
How the Credential Connects to Getting Hired
Because the LST credential is administered entirely through ADCI's Skill N Depth online application and examination system, your job search and your certification paperwork are functionally the same process. Contractors check your Skill N Depth status the way other industries check a license number.
Here's what employers are actually verifying when they review a candidate:
| Requirement | Why Employers Check It |
|---|---|
| Completed ADCI LST online examination | Confirms baseline knowledge of physics, physiology, and saturation theory |
| 100+ field days as an assistant LST | Demonstrates hands-on readiness beyond theory |
| Equipment-specific training | Matches you to the specific chamber/system the contractor operates |
| Valid CPR and first aid | Non-negotiable safety compliance for offshore work |
| Personal logbook under the 6.5 Edition standards | Provides an auditable record of experience and compliance |
If you're still building toward eligibility, our detailed LST requirements breakdown walks through each prerequisite in the order most candidates complete them. And if cost is a factor in your planning - exam fees, renewal cycles, equipment training - the LST certification cost guide lays out the pricing structure so there are no surprises mid-process.
Pay, Progression, and Career Paths
Compensation in this field varies widely by contractor, region, project type, and whether the work is inshore or offshore saturation diving. Rather than quoting figures that shift constantly with contract cycles, it's more useful to understand the progression pattern most LSTs follow:
- Assistant LST - accumulating field days while earning entry-level rates on a dive team.
- Certified LST - qualifying for lead life support roles after passing the exam and logging required experience.
- Senior LST / multi-system qualified - adding equipment-specific certifications across different chamber and gas systems, which typically opens higher-paying contracts.
- Supervisory roles - moving into saturation systems supervision or superintendent positions after multiple renewal cycles and demonstrated leadership on-site.
For a deeper look at how pay tends to scale with experience level and equipment qualifications, the LST salary guide covers this in more detail without relying on speculative numbers. And if you're weighing whether the time and cost investment pays off long-term, our ROI analysis breaks down the trade-offs candidates should actually consider.
Timing Your Exam Prep Around a Job Search
Because the exam and the job search are intertwined, it's worth building a short prep schedule that aligns with when contractors typically staff up for projects, rather than studying in a vacuum. A simple four-week structure works well if you're already accumulating field days and need to lock in exam readiness alongside your assistant role.
Core Theory Review
- Diving physics and physiology fundamentals
- Basic saturation theory concepts tied to real chamber operations you've observed
Standards and Safe Operations
- Review relevant sections of the 6.5 Edition International Consensus Standards
- Cross-check logbook entries against required documentation practices
Equipment and Procedure Drilling
- Focus on the equipment-specific training tied to your target employer's systems
- Practice scenario-based questions mirroring gas panel and emergency response decisions
Full Exam Simulation
- Complete timed practice sessions through the LST practice test platform
- Review weak areas identified in the domains guide before submitting your Skill N Depth application
This schedule assumes you already have field experience feeding your understanding - if you're earlier in the process, our LST study guide lays out a more complete first-attempt strategy, and the difficulty guide sets realistic expectations for how much time to budget.
Key Takeaway
Don't separate "studying for the exam" from "working toward the job." The field days, logbook entries, and exam prep all feed the same Skill N Depth application employers ultimately review.
Frequently Asked Questions
No, but most candidates work as an assistant LST for an ADCI-affiliated contractor while accumulating the required 100 field days, since that experience is a prerequisite for full certification.
You can apply for assistant LST roles without having passed the exam yet, but lead LST positions generally require a completed ADCI LST examination through Skill N Depth plus documented field experience.
Yes. Cards are valid for five years, and current rules require an online examination for renewal, not just a paperwork update. Employers typically check that your card is current before assigning you to a project.
An assistant LST works under supervision while logging field days toward eligibility. A certified LST has completed the exam and met the experience and training requirements to operate independently on saturation systems.
Structured practice questions covering the exam domains are available through the LST practice test site, which pairs well with reviewing the official passing score requirements before you register.