Site Selection Consultant vs. Broker vs. Engineer: Who Does What

The titles overlap in practice, which is why buyers often hire the wrong one first. A useful way to separate them is by the question each is accountable for. A site selection consultant (or site intelligence firm) is accountable for the recommendation: which regions, which parcels and why. A broker is accountable for the transaction: reaching owners, negotiating terms and getting to a signed agreement. An engineer is accountable for technical documents that others, such as a utility or a county, will rely on, and in many cases signs and seals them.

None of these roles replaces the others. A consultant who finds a strong site still needs a broker or attorney to secure it and engineers to design it. A broker with a great listing still needs someone to test whether it can be powered. Our guide on how to choose a site selection firm covers what to ask each kind of firm.

Corporate site selection consultants advise companies on where to locate facilities across labor, cost, infrastructure, incentives and risk. Their main association, the Site Selectors Guild, was founded in 2010 to advance the profession and promote integrity and objectivity, and admits members through peer nomination and vetting.⁸ Consultants generally describe themselves as paid by the corporations they advise.⁹

Site intelligence firms are a narrower, more technical variant. For data centers, the hard questions are physical: whether land can reach transmission, gas, water and fiber; whether it is buildable after floodplain, wetlands and slope; and whether zoning allows the use. These firms screen many parcels against those criteria, rank them and verify the short list.

Location advice is not itself a licensed activity in the way brokerage and engineering are. When a consultant’s work crosses into brokering a deal for pay, or into preparing engineering documents for approval, those licensing rules apply.¹³ Ask how a consultant is paid; some advisers take a share of incentives awarded, which is worth knowing before you sign.

Hire a consultant first when you do not yet know where to look, when you need to compare many sites on the same basis, or when you need an outside view of a portfolio. Our guide to screening a land portfolio shows what that work involves.

Brokers are licensed by the states. In Texas, for example, selling, buying, leasing or managing real estate for another person in exchange for compensation requires a license, and unlicensed activity can bring administrative and criminal penalties unless an exemption applies.¹ Other states have similar laws with their own exemptions, so confirm the rules where the land sits.

Commissions are negotiable; the National Association of Realtors says it does not set them.² Because brokerage pay usually depends on a closed deal, a broker’s natural incentive is to get a transaction done. That is useful when you need momentum and dangerous when the site has not been tested. Since January 2025, NAR’s Code of Ethics requires Realtors to disclose in writing any present or contemplated interest in a property to all parties before an agreement is signed.¹⁰

Brokers earn their fee on owner outreach, market knowledge, pricing and negotiation. On data center land that often means approaching several owners quietly, structuring an option agreement or letter of intent, and assembling adjacent parcels. Our guide for land brokers describes what buyers will expect a broker to know.

Hire a broker once you know what you are looking for and roughly where, or when you own land and want to bring it to the market. A broker is a poor substitute for a technical screen and a strong complement to one.

Engineers are licensed by state boards, not by professional societies. The National Society of Professional Engineers describes a common path: an accredited engineering degree, the Fundamentals of Engineering exam, about four years of qualifying experience (usually under a PE) and the Principles and Practice of Engineering exam, with details varying by state.⁴ Every state reserves the authority to sign and seal engineering plans to licensed PEs.³

A seal is a statement of responsibility. Alabama’s rules, for example, provide that a seal means the document was prepared by the licensee or under their responsible charge, or reviewed in enough depth to take responsibility for it, and limit sealing to the licensee’s area of competence.¹¹ That is the difference between an engineering study and a screening report: one carries a licensed professional’s responsibility, the other does not.

Civil engineers handle grading, drainage, stormwater, roads and the site plan, and coordinate the geotechnical review. Electrical engineers design the service, substation interface and on-site distribution and help the owner work through the utility’s load study, though the utility runs its own studies of its system. Licensed land surveyors, a separate profession, prepare the boundary and ALTA survey.

Hire engineers once a site is under control or close to it. Before that, a short, scoped engineering review of one or two key questions (slope and drainage, or the distance and route to a substation) can be money well spent, but full design work on land you do not control usually is not.

Utility economic development teams

Utilities and state economic development agencies often help with confidential site searches at no charge. California’s state economic development office, for example, describes discreet, customized site searches based on a company’s specifications, at no cost to the client.¹² Many utilities run site readiness programs, though a 2020 Site Selectors Guild white paper found those programs do not all follow the same standards.¹³ The utility’s engineering and tariff staff, not its marketing, decide capacity: AEP Ohio’s data center tariff, for instance, requires new data centers to pay for at least 85% of contracted capacity for up to 12 years.⁵ Reuters reported that utilities receive duplicate requests for the same projects and that Oncor counts a load only after signed agreements and collateral.¹⁴

Land-use attorneys

Attorneys handle title, options, purchase agreements, development agreements and the rezoning or special-use process. Procedures are local: one Georgia county, for example, sends notice of the first rezoning hearing to owners within 1,000 feet of the property.¹⁵ An attorney who knows the county’s planning commission and board is often worth more than one who knows data centers. See zoning for data centers.

Environmental consultants

Environmental consultants prepare the Phase I ESA, delineate wetlands and coordinate species and cultural resource reviews. EPA recognized ASTM E1527-21 as meeting its All Appropriate Inquiries rule effective February 13, 2023, and retired the older E1527-13 standard a year later.⁶ Wetland boundaries ultimately go to the Army Corps of Engineers; the Supreme Court held in 2016 that an approved jurisdictional determination is a final, appealable action.⁷ See wetlands and data center development.

The order matters because each role spends money on the answer the previous one produced. Hiring engineers before you know where to build wastes design fees; hiring a broker before a technical screen can lock you into an option on land that cannot be powered on your schedule.

Two adjustments are common. A landowner starts in the middle: the land is already controlled, so the first hire is usually a screen of what the land could support, then a broker to take it to market. A buyer who receives an unsolicited listing should reverse the usual pull and get a quick technical review before negotiating. Either way, line up environmental, survey and engineering work so it fits inside the due diligence period; our due diligence checklist lists what belongs there.

The cleanest projects have one owner’s representative who holds the decision and treats each adviser as accountable for their own question. Problems tend to appear where roles blur.

• A brokerage that also offers “site selection” may steer toward sites it can transact. Ask about listings and land interests in writing.¹⁰
• An engineering firm that offers screening may be thorough on design but thin on market and entitlement judgment. Ask what is in scope.
• A consultant paid on incentives may weight incentive-rich locations too heavily.
• A utility or economic development partner is promoting its territory. Its help is real and free; it is not neutral between regions.¹³¹²

Overlap is not a problem in itself. Many good firms combine roles. The fix is disclosure and a clear statement of who is responsible for each finding.