Investment banks split work into front, middle and back office to make it clear who takes risk, who controls risk, and who makes sure the trade actually goes through (i.e., it’s booked properly, confirmed, and settles).
Each office plays a different role in balancing revenue with safety. It’s natural for front office teams to push for more business because that’s how they’re measured and paid. But the bank also has to make sure people don’t take risks that look great in the short term while creating big tail risk, hidden leverage, or regulatory trouble.
A good real-world example is Archegos (2021). Credit Suisse’s prime brokerage business built very large exposures to a single client, and when the underlying positions moved, things unwound fast. CS ended up with a ~$5.5bn loss. The FO successfully maximized short-term revenues, but at catastrophic long-term consequences, something which the MO turned a blind eye toward.s
You’ll see a lot of posts online glorifying front office jobs and dismissing “back office” as low skill or replaceable. That’s not the point of this website, where I focus more on how each office works. Markets only function because someone makes sure trades are controlled, processed, and settled cleanly. If any one part breaks, the whole machine suffers—client relationships included.
Front Office (FO)
FO is the client-facing engine. In S&T that’s mainly Sales and Trading: sales are responsible for speaking to clients, sharing market colour, pitching trade ideas, and sourcing new opportunities; traders quote prices, execute, manage positions, and hedge risk. FO performance is measured very directly—commissions and rankings for sales, P&L and volumes for trading—so the culture is usually direct & straightforward – if it pays, it’s good business!
FO staff are almost always licensed by the relevant regulators – SEC license in the US, FCA approval in the UK, or SFC License in Hong Kong. Speaking to clients regarding securities without such license could land you and the Bank in serious trouble!
By that definition, Research is also often categorized in FO – Analysts spend a significant portion of their time talking to clients, explaining their ideas & fulfilling their requests on stocks / industries.
Middle Office (MO)
MO works tightly with FO, but with a different purpose: making sure the revenue is earned inside the bank’s rules and risk appetite. This includes functions like market risk, credit/counterparty risk, product control, and compliance. They monitor exposures, set and enforce limits, challenge pricing/valuation (especially in less liquid products), and escalate issues when something looks off. People call MO the “bad cop,” which is sort of true – a healthy MO desk prevents overly ambitious FO staff from causing big damage to the bank, preventing blow ups such as Archegos.
Back Office (BO)
BO (Operations) is what turns a trade into a final product. After FO agrees a deal, BO makes sure it’s booked correctly, confirmed with the counterparty, cleared/settled on time, reconciled, and that breaks are fixed quickly. All sounds boring, but if not done correctly can cause serious issues with clients down the line.
Dynamics between them
Tension between the different offices is quite natural. FO wants to take all types of trades it believes will make it money. That happened in the early 2000s and ended with the GFC and collapse of Lehman Brothers. MO wants control—because the bank needs to survive bad days and stay onside with regulators. BO wants accuracy—because sloppy booking and messy processes always come back as real losses or real headaches.
Here is an example of friction – FO wants a quick exception to banks risk limits because a client is important – you don’t want to reject an important client; However, the top Investment Banks all have standardized risk systems that are rarely breached. Even for top clients, the Bank doesn’t tend to provide exceptions – if you exempt one important client, then you probably have to exempt the other important clients …. once the genie is out of the bottle….
The MO will communicate to FO how this trade cannot be approved, and the trader will either reluctantly agree, or sometimes shout at MO. This is quite normal, so a good MO employee will have the ability to explain things clearly to FO staff.
Career progression (roughly how it tends to work)
- FO: progression is heavily performance-driven. You build product/client expertise early, then take more ownership of coverage (sales) or risk (trading). Pay is more variable and tied to desk results, and the path can be very rewarding—but also less forgiving when markets change.
- MO: progression is about becoming the person who can challenge FO credibly, make good calls under pressure, and communicate risk clearly to seniors. Strong MO people end up as trusted partners to desks, and later move into bigger risk leadership roles such as Chief Risk Office (CRO) or Chief Compliance Office (CCO). There is also opportunities to move to FO roles considering the close contact between MO and FO – I think any determined MO officer will have the opportunity as banks stress internal mobility, as long as you don’t piss off any traders.
- BO: progression is about mastering the trade lifecycle and then owning processes, people, and change. The best BO careers often involve moving into trade support, controls, transformation, or process automation, where you’re improving how the whole platform runs—not just “processing tickets.” However, note that most of these functions have been outsourced to cheaper countries such as India / China, and it will be difficult to find such a role in major financial hubs such as London / NY. This is also another desk that is most at risk of being automated by AI.
Ultimately, each desk is essential to the healthy functioning of the bank. And to finish off:
“FO gets the glory, MO gets the blame, BO gets the 6:30am calls when settlement fails. Everyone is essential“.