Home › Business Services › Engineering firm
The 6 Best Engineering Firms in Long Beach (2026)
This list ranks the top engineering firms serving Long Beach and nearby neighborhoods using Google review data, updated for 2026. We use a Bayesian-weighted score that favors consistently high ratings while accounting for the number of reviews, so a well-reviewed but lightly reviewed listing isn’t ranked above a firm with broader community validation. Long Beach’s built environment—from coastal infrastructure to commercial and industrial projects—relies on diverse engineering services. These six firms stood out in our calculations, offering options across structural, civil, aerospace-adjacent, and general engineering consultancy categories.
This ranking is computed from Google reviews (our method). Listings marked Partner are paid advertising spots: they sit alongside the ranking without changing its order.
Are you a engineering firm in Long Beach?
People reading this page are looking for a pro right now. Put your business above the ranking, with your contact details and a link to your site.
✓ Live immediately · ✓ One-time payment · ✓ No subscription
10 of 10 spots still available
AAA Engineering Design
AAA Engineering Design tops our list because it combines a perfect 5.0 Google rating with a substantial 21 reviews, giving it both peak score and review depth. Classified as a structural engineer and located in Signal Hill, it edges out competitors by maintaining flawless ratings across a meaningful review sample. That balance of rating and review volume is the primary reason it ranks first in this 2026 evaluation.
The full ranking
Mid-Cities Engineering
Mid-Cities Engineering is rated 5.0 based on 15 Google reviews and appears under Engineering consultant, with an address in Bellflower just outside Long Beach city limits.
15 reviews
McGrath Civil, Inc.
McGrath Civil, Inc. carries a 5.0 rating from 11 reviews on Google and is categorized as a Civil engineer, located in the Long Beach area on Kilroy Airport Way.
11 reviews
Worley Long Beach
Worley Long Beach has a 4.6 Google rating from 22 reviews and is listed as an Engineering consultant; its office is in downtown Long Beach at the World Trade Center address.
22 reviews
Keystone Engineering Co.
Keystone Engineering Co. shows a 4.3 rating with 14 Google reviews, categorized as an Aerospace company and located near the Long Beach airport on Donald Douglas Drive.
14 reviews
P2S Inc.
P2S Inc. is rated 4.3 from 17 Google reviews and appears as an Engineering consultant, with offices on E Spring St in Long Beach.
17 reviews
Frequently asked questions
How should I choose an engineering firm in Long Beach?
Match the firm’s core category and experience to your project type (structural, civil, aerospace-related, etc.), check recent project examples, and verify professional licenses. Also consider local experience, communication style, and how they handle permits and local regulations.
What should I check before hiring an engineering firm?
Confirm their professional licenses and insurance, ask for references or recent project portfolios, and request a clear scope of work and timeline. Review contract terms for deliverables, fees, and responsibility for permit-related work.
How much does hiring an engineering firm typically cost?
Costs vary widely by project size, complexity, and discipline; small consultations differ greatly from full design and permitting services. Get multiple detailed proposals and compare scope, deliverables, and fee structures rather than only the lowest bid.
How was this ranking built and updated?
The ranking is based on Google review data processed with a Bayesian-weighted score that combines average rating and review count, updated for 2026 to reflect current public feedback. This method reduces the chance that a very small number of reviews will skew the order.