Boolean search strings for mechanical engineers: CAD, analysis, HVAC and the mechanic collision

"Mechanical" is a broad word in a resume database. It pulls in auto and diesel mechanics, HVAC service technicians, mechanical contractors' installers and maintenance staff, alongside the engineers a client actually wants. And "mechanical engineer" itself covers jobs as different as designing a medical device enclosure, sizing chillers for a hospital, running finite element analysis on a bracket and keeping a stamping line running.

The specialty decides the vocabulary. Below are ten strings organized by the kind of mechanical work, and what LinkedIn, Indeed and Google support as of October 2026. For the operators themselves, see Boolean search strings for recruiters.

Specialties, tools and credentials that change what a mechanical search finds

• PE licensure runs through NCEES and the state boards. The FE exam is described by NCEES as generally the first step toward a PE license. NCEES's PE exam page lists three mechanical modules as of October 2026: HVAC and Refrigeration, Machine Design and Materials, and Thermal and Fluids Systems. The license itself is issued by a state board; NCEES keeps a directory of member boards, and each board runs its own lookup.
• EIT and EI mean the same stage. After passing the FE, candidates may hold a state certificate called engineer in training (EIT) or engineer intern (EI), depending on the state. Search both.
• CAD certifications. Dassault's SOLIDWORKS program includes the CSWA (associate) and CSWP; its page now calls the CSWP "SOLIDWORKS Design Professional," while many candidates still write Certified SOLIDWORKS Professional.
• GD&T certification. ASME runs the GDTP certification against the Y14.5 standard, at Technologist and Senior levels. It is uncommon, so treat it as a bonus.

Ten Boolean strings by mechanical specialty

Swap in the tools and industry from your own intake; these are examples.

Design and analysis

1. Product design engineer — LinkedIn general search
("mechanical engineer" OR "design engineer" OR "product design engineer") AND (solidworks OR creo OR "siemens nx" OR catia) AND ("gd&t" OR "geometric dimensioning" OR "tolerance stack") NOT (mechanic OR technician OR recruiter)

2. FEA analysis engineer — LinkedIn general search
("analysis engineer" OR "cae engineer" OR "mechanical engineer") AND (fea OR "finite element") AND (ansys OR abaqus OR nastran)

3. Thermal and CFD engineer — LinkedIn Recruiter, Job titles + Keywords filters
("thermal engineer" OR "mechanical engineer") AND (cfd OR "computational fluid dynamics") AND (fluent OR icepak OR flotherm)

4. Certified CAD or GD&T — LinkedIn Recruiter, Keywords filter
("mechanical engineer" OR "design engineer") AND (cswp OR "certified solidworks professional" OR "solidworks design professional" OR gdtp)

Buildings and manufacturing

5. HVAC design engineer — LinkedIn Recruiter, Job titles + Keywords filters
("mechanical engineer" OR "hvac engineer" OR "mep engineer") AND (revit OR "trane trace" OR "carrier hap") AND ("load calculations" OR ashrae) NOT ("hvac technician" OR "service technician" OR installer)

6. Licensed mechanical engineer for stamped work — LinkedIn Recruiter, Keywords filter
("mechanical engineer" OR "hvac engineer") AND ("professional engineer" OR "pe license" OR "licensed pe") AND (hvac OR plumbing OR "fire protection")

7. Manufacturing or process engineer — Indeed Smart Sourcing
("manufacturing engineer" OR "process engineer" OR "mechanical engineer") AND skill: (pfmea OR "lean manufacturing" OR "six sigma") AND (cnc OR "injection molding" OR stamping)

8. Entry-level mechanical engineer — Indeed Smart Sourcing
("mechanical engineer" OR "engineer in training" OR "engineer intern") AND fieldofstudy: "mechanical engineering" AND (internship OR "co-op" OR "senior design")

Search-engine X-ray

9. Public profiles by tool and metro — Google X-ray
site:linkedin.com/in ("mechanical engineer" OR "design engineer") "solidworks" "tolerance analysis" "grand rapids" -jobs -recruiter

10. Public resumes with design and analysis — Google X-ray, filetype search
filetype:pdf "mechanical engineer" resume ("solidworks" OR "creo") "fea" -template -sample

What LinkedIn, Indeed and Google actually support

As of October 2026, LinkedIn's Boolean help page requires capital AND, OR and NOT, supports quotes and parentheses, and does not support wildcards. That matters here because engineers write "tolerance stack," "stack-up" and "tolerance analysis" for the same work; write the variants out. Symbols such as the ampersand in GD&T are not reliable search terms anywhere, so pair them with a spelled-out phrase. LinkedIn Recruiter's Boolean page lists Job titles among the Boolean-capable filters and warns that very long queries can cause problems.

Indeed's Boolean guide documents a skill: field and education fields, school: and fieldofstudy:, which is how string 8 targets the degree. Google's search operators page documents quotes, site:, the minus sign and filetype:, but not OR, so check once whether the OR block in an X-ray changes the results.

Narrowing by industry and ownership

Industry matters almost as much as specialty. A design engineer from consumer electronics, one from heavy equipment and one from medical devices all use SolidWorks, but the medical device engineer also knows design controls and the heavy equipment engineer knows weldments and fatigue. Add an industry block such as ("medical device" OR "design controls") only when the client says it is a must-have.

Ownership words help with seniority: "designed," "released to production," "owned the design" and "led the redesign" tend to come from people who made the decisions, while "assisted," "drafted" and "updated drawings" tend to come from drafters and junior engineers. LinkedIn's premium search filters add Years of Experience in Recruiter and Sales Navigator; on a free account, the ownership words do that job.

False positives worth excluding with NOT

• Mechanics and technicians. "Mechanic," "technician," "installer" and "maintenance" profiles mention mechanical systems constantly. Exclude them, and require a design or analysis tool.
• HVAC service staff, for design roles. HVAC technicians list the same equipment engineers size. See the HVAC technician screening questions if the client actually needs field service.
• The PE collision. "PE" also means physical education, private equity and polyethylene. Never search it alone.
• Drafters and designers, when the role needs an engineer. "Mechanical designer" and "CAD drafter" profiles list the same software. Keep them when the client wants detailing; exclude them when the role needs engineering judgment or a license path.
• Vendor sales. CAD and simulation resellers' "application engineers" and "sales engineers" list every tool. Exclude "sales" and "reseller."

A worked example: three passes on an HVAC design search

An invented search, shown as it actually gets narrowed.

The NOT block did most of the work in pass 2. In mechanical searches, removing technicians usually matters more than adding tools.

What a search cannot verify

A string can find someone whose profile names the right CAD tool and specialty. It cannot show whether they designed the part or updated the drawing, whether a PE license is active in the client's state, or how they handle a design that fails test. The mechanical engineer phone screen questions test that ownership, how to source candidates on LinkedIn covers outreach once you have the list, and the sister guides for electrical engineers and civil engineers cover the other disciplines that share the PE process.