Sample supplier report · October 21, 2026

Box build and system integration suppliers, US

Best box build and system integration contract manufacturers in the US” Assumed: any volume · ISO 9001, IPC/WHMA-A-620The buyer’s question, as they typed it. Assumed: Assumed: any volume · ISO 9001, IPC/WHMA-A-620.

The answer

Send the RFQ to PEKO, Foxtronics, Astro and Sierra; 13 questions to settle first. Second-source Foxtronics EMS: ISO 9001:2015 confirmed, box build in Jacksonville. Neither PEKO nor Foxtronics shows IPC/WHMA-A-620 on the pages read. LeeMAH is closing its Brisbane headquarters and laying off 212.

The shortlist

Rank	Supplier	Role	Where	Score
1	PEKO Precision Products	Lead	Rochester, NY	24 / 24
2	Foxtronics EMS	Second source	United States	22 / 24
3	Astro Manufacturing (Astro Engineering)	Fallback	Eastlake, OH	22 / 24
4	Sierra Assembly Technology	Fallback	Chino, CA	20 / 24
5	LeeMAH Electronics	Watch	Brisbane, CA	14 / 24

Scorecard, criterion by criterion

Criterion	PEKO	Foxtronics	Astro	Sierra	LeeMAH
Box build ×2Your ask	8	8	6	8	6
System integration ×2Your ask	8	6	8	6	6
US plants ×2Your ask	8	8	8	6	2
Total of 24	24	22	22	20	14

Points as weighted: the buyer’s asks count double where marked. A dash means nothing published backs a score, so it isn’t counted as zero.

The suppliers

PEKO Precision Products

Lead · Rochester, NY

Large Rochester campus that builds cabinets and systems for defense, medical and semiconductor OEMs. 375,000 sq ft across 9 facilities. NIST 800-171 named on its site.

Foxtronics EMS

Second source · United States

Multi-plant US electronics platform with box build, as a second source. ISO 9001:2015 named and confirmed. Founded in 1989.

Astro Manufacturing (Astro Engineering)

Fallback · Eastlake, OH

Systems and machines integrator with in-house NADCAP painting.

Key findings

The US supply base: 2.7% base MFN general duty, HTS 8537.10.91.50.
PEKO leads on plant area at 375,000 sq ft; next Astro at 142,000 sq ft.
PEKO and Astro each name four customers, the most.

Settle these before you send the RFQ

Q1Confirm in writing: ISO 9001.
Q2Confirm in writing: IPC/WHMA-A-620.
Q3Ask every bidder how many production lines it would run for the order.
Q4Ask for current ISO 9001:2015 certificate from ABS Quality Evaluations and IPC/WHMA-A-620 status. (PEKO)
Q5Confirm its sites in the US, by city. (Foxtronics)
Q6Ask which plant builds box builds and whether any site works to IPC/WHMA-A-620. (Foxtronics)
Q7Ask for the ISO 9001:2015 certificate copy and any electrical box build references. (Astro)
Q8Confirm IPC/WHMA-A-620 certification, headcount and founding year. (Sierra)

How the research was done

50 found → 47 fit the brief → 20 researched → 5 ranked. Every score in the full report links to the page it came from, and the open questions are written out for the RFQ.

Sources

Read the full report

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