D.F. O’Brien & Co., CPA’s is a construction-focused accounting and advisory firm serving contractors, engineers, and architects throughout New Jersey and New York. I didn’t stumble into construction — I built my career here. Construction doesn’t fail because contractors don’t work hard.
It fails because the numbers lie. My job is to make sure your numbers tell the truth — early enough to do something about it
For over 40 years, I’ve worked inside the financial realities of the
If you’re looking for a CPA who just files returns, we’re not a fit.
If you want a long-term advisor who understands construction, welcome.
We focus on contractors, trades, engineers, and architects only. With 40+ years in construction accounting, we give you clean numbers, straight answers, and bonding-ready financials you can rely on.
We work with contractors, trades, engineers, and architects every day not generic “small businesses.
Decades of field-tested experience with WIP, job costing, GAAP financials, bonding, and cash flow.
Financial statements and WIP reports that match the field and keep your surety, bank, and owners confident.
No fluff, no corporate jargon, just clear explanations and a CPA you can reach when something breaks.
“d.f. o’brien & co. keeps our books clean, our WIP schedules accurate, and our tax planning proactive. Our bonding agent even commented on how much cleaner our financials look now.”
