ANSI/TIA-568.3-D is the appropriate and up-to-date standard for fiber installations. You should ask your contractor to comply with these guidelines.
When we hire a subcontractor, we always ask for the fiber technician to be Fiber Optics Technician-Inside Plant (FOT-ISP) certified. This means:
A Fiber Optics Technician – Inside Plant (FOT-ISP) must be able to
accurately install, terminate, test, and troubleshoot fiber optic
communication systems used in premises, LANs, enterprise and data
center installations. Included are various techniques applicable to
gigabit multimode and single-mode systems consisting of unique test
requirements in Ethernet and Fibre Channel, but also pertinent to
FTTx, security systems, and CATV networks. As many inside plant
installations use multimode fiber, the FOT-ISP technician must
recognize the various types - IEC defined OM2, 3, 4 & 5 multimode -
and OS2 single-mode fibers along with the various proper launch
conditions used when testing fiber spans as also defined by the
TIA-568 and TIA-942 standards. Technicians must similarly comprehend
various fiber optic cable connector types and termination used in
these networks, using best practices for installing and testing fiber
An FOT-ISP technician has the knowledge and skills required for proper
installation, preparing optical loss budgets, splicing, repairing,
terminating, connecting, testing and troubleshooting of multimode and
single-mode fiber optic links. Additional knowledge and skills
include identifying the roles of attenuation, dispersion and
reflection by optical loss testing of transmission equipment along
with an understanding of OTDRs including acceptance testing and
troubleshooting fiber optic elements and spans. The FOT-ISP should
have a basic understanding of the National Electrical Code (NEC®) and
all safety conditions specific to the inside plant and campus
This certification is accredited by the International Certification Accreditation Council (ICAC).
We always terminate fiber in a wiring closet, where the switch/router etc. can be mounted close to the cable installations with proper power, security etc. The fiber is always terminated in a fiber panel that uses LC/PC duplex connectors. We would always ask the technician to install at least 6 pairs (12 fiber strands) and at least 5 extra meters of fiber cable should be left (coiled) and mounted at the back of the wiring closet with Velcro, so that it can be moved or spliced again in case of cable damage.
That's how we do it.