PLS, PS, RLS, RPLS and PSM are the abbreviations that attach to land surveying's professional license — after surveyors' names, on applications and filings, and in job postings.
Four of them are license titles: PLS, PS, RPLS and PSM are different boards' names for the same class of credential, the professional license to practice land surveying that each state's board issues.
Which letters a surveyor carries depends on the issuing state: Massachusetts licenses Professional Land Surveyors (PLS), Texas registers Registered Professional Land Surveyors (RPLS), and Florida licenses Professional Surveyors and Mappers (PSM).
What does PLS stand for?
PLS stands for Professional Land Surveyor.
It is the license title a state board puts on its professional-level land surveying credential — the letters you see after a licensed surveyor's name in states that use this spelling.
Board statutes spell the title out.
Massachusetts licenses the Professional Land Surveyor (PLS).
Washington's title is professional land surveyor (PLS), paired with the land-surveyor-in-training (LSIT) certificate.
Louisiana's is professional land surveyor (PLS), alongside its land surveyor intern (LSI) certificate.
California licenses the Professional Land Surveyor too, with Licensed Land Surveyor as the state's alternate wording.
The national frame agrees with the states.
NCEES's Model Law treats professional land surveyor as an equivalent term for its professional surveyor license.
And the license itself is the state's act.
NCEES's members are the engineering and surveying licensing boards of all 50 states, the District of Columbia, Guam, the Northern Mariana Islands, Puerto Rico and the US Virgin Islands — and it is those boards, not NCEES, that issue licenses.
So PLS after a name is a specific claim — this person holds a state board's land surveying license.
What that license is, what it allows, and the requirements behind it are the territory of our land surveyor license guide.
This page stays on the letters.
What is an RPLS in Texas and a PSM in Florida?
RPLS stands for Registered Professional Land Surveyor — the title Texas uses for its professional land surveying registration.
Texas issues three surveying credentials: the Surveyor-in-Training (SIT) certification, the RPLS registration, and a separate Licensed State Land Surveyor (LSLS) license.
PSM stands for Professional Surveyor and Mapper.
Florida's license is the surveyor and mapper — shown in rule as Professional Surveyor and Mapper — and Florida board rule 5J-17.063 lists PSM among the accepted titles and abbreviations for a licensed Florida surveyor and mapper.
Neither title is a different kind of credential from a PLS.
For the PSM, NCEES's Model Law counts professional surveyor and mapper among the equivalent terms for its professional surveyor license; for the RPLS, Texas's own scheme makes it the board's professional-level registration.
What each board requires behind its title is the board's own — confirm it with the issuing board before you rely on a title in a contract, proposal or filing.
What do RLS, LS and PS mean?
LS stands for Land Surveyor: Hawaii's board issues its surveying license as LS (Land Surveyor).
Licensed Land Surveyor is a spelled-out title elsewhere.
California's statute names the license the Professional Land Surveyor, or Licensed Land Surveyor, and New Hampshire's title is Licensed Land Surveyor — the legend required on the seal.
PS stands for Professional Surveyor.
Arkansas's license title is Professional Surveyor (PS), paired with a Surveyor Intern (SI) certificate — the two credentials its board issues and maintains.
RLS stands for Registered Land Surveyor, and it is the trickiest of the set.
Federal O*NET data for the Surveyors occupation (17-1022.00) lists Registered Land Surveyor among the job titles surveyors report, alongside Land Surveyor, Licensed Land Surveyor and Professional Land Surveyor.
One board rule does put the letters to work: Florida rule 5J-17.063 lists registered land surveyor and RLS among the titles and abbreviations accepted for a licensed Florida surveyor and mapper.
Even there, the license itself is the surveyor and mapper — RLS is an accepted shorthand, not the credential's title.
No statute or rule our research read names Registered Land Surveyor as the license itself.
The registered-versus-professional mix shows up on licenses themselves.
Massachusetts's license is the Professional Land Surveyor (PLS), but the state's statutory seal legend reads Registered Professional Land Surveyor — the adjective on the seal and the adjective in the title do not have to match.
Read the adjectives loosely and the letters precisely.
Licensed, professional and registered are the flavor words boards swap for one license class — and each board's own statute is the authority for the exact letters it issues today.
Are all these the same license?
Same class, separate licenses.
NCEES's Model Law, revised in August 2026, treats Professional Land Surveyor, Professional Surveyor and Mapper and Geomatics Professional as equivalent terms for its Professional Surveyor license.
The state titles above are each board's own statutory name for the license it issues — the Model Law is a template, and each state's statute sets the actual title.
Each license is still its own board's credential.
What the letters are not matters as much.
They are not different levels — the one credential our research found below the professional license is the intern certificate, and the Model Law says its enrollment document does not authorize the holder to practice as a professional surveyor.
They are not NCEES credentials: the state and territory boards issue the licenses, and NCEES does not.
The decoder in one list, with the boards our research verified:
- PLS — Professional Land Surveyor: Massachusetts, Washington and Louisiana license the PLS.
- LS — Land Surveyor: Hawaii issues its license as LS. Licensed Land Surveyor, spelled out, is California's alternate title and New Hampshire's title and seal legend.
- PS — Professional Surveyor: Arkansas's title, paired with the SI intern certificate.
- RPLS — Registered Professional Land Surveyor: Texas's professional registration, alongside SIT and LSLS.
- PSM — Professional Surveyor and Mapper: Florida's license, with PSM an accepted abbreviation under board rule.
- RLS — Registered Land Surveyor: not a license title in our research. Florida rule 5J-17.063 accepts it — as registered land surveyor and RLS — among the titles and abbreviations for a licensed Florida surveyor and mapper.
Because each statute sets the title, the license and its letters belong to the issuing board.
Titles are statute text
What are the intern titles (LSIT, SIT, LSI, SMI)?
The step below the license has its own set of letters.
Under the NCEES Model Law the credential is the surveyor intern certificate: a qualifying surveying education plus a pass on the Fundamentals of Surveying (FS) exam.
The Model Law is explicit that the enrollment document does not authorize the holder to practice as a professional surveyor.
The states spell the step differently:
- LSIT — Land Surveyor-in-Training: California's intern title, and Washington's (land-surveyor-in-training).
- SIT — Surveyor-in-Training: Texas's intern certificate, and Massachusetts's optional Surveyor-in-Training certificate (the state's statute says land surveyor-in-training).
- SI — Surveyor Intern: Arkansas's intern title.
- LSI — land surveyor intern: Louisiana's intern certificate.
- Surveyor and mapper intern — Florida's statutory intern title, which includes surveyor-mapper-in-training.
SMI is the one abbreviation our research could not verify in a board source — Florida's statute spells its intern title out in words rather than a four-letter mark.
If you see SMI on a roster or an application form, the issuing board's own materials are the authority for what it stands for.
The certificate behind the letters — who issues it, what it allows, whether it expires — is our LSIT certification guide.
Is a 'land surveyor' without these letters licensed?
The letters are the license claim — and the Model Law treats claiming them as practice.
Under the model, a person is treated as practicing surveying if they hold themselves out as able to practice, or represent themselves as a professional surveyor, by verbal claim, sign, advertisement, letterhead, card or in any other way.
Each state's statute writes its own version of that rule.
The model also lets boards fine unlicensed people who practice or offer surveying or who use the professional surveyor title — with each day of a continuing violation a separate offense, and the fine amount left to each state.
Working in surveying without a license is a different question, and the model draws that line too.
Employees and subordinates of a licensee may do surveying work without their own license only when the work excludes final surveying designs or decisions and is done under the responsible charge of, and verified by, a licensee.
That describes the crew — rod persons, instrument operators, party chiefs — whose titles are jobs, not licenses.
Job postings blur the distinction by habit.
Federal O*NET data lists Land Surveyor, Licensed Land Surveyor, Professional Land Surveyor and Registered Land Surveyor among the titles surveyors report for the same occupation.
In a posting, the words describe the work.
After a name on a plat, a seal or a filing, they are the license claim — and the state's statute decides who may make it.
Career information for surveyors and the firms that hire them — not legal, tax or licensing advice. License titles are set by each state's statute; confirm the title your board issues, and what it requires, with that board.