And another five businesses across the west of Scotland are also hoping to win national recognition in this year's Vision in Business for the Environment of Scotland (VIBES) Awards.
The scheme is in its 12th year and highlights firms taking steps to reduce their impact on the environment.
Seven major employers are in the running for an award including the Glasgow office of highway maintenance giant Amey, Paisley-based distillery Chivas Brothers, Robert Wiseman Dairies of East Kilbride and Magnox North, the management and operations contractor hired to decommission the Hunterston A nuclear plant in North Ayrshire.
Gongs could also go to Brookfield Multiplex Construction Europe which is designing and building Glasgow's new Southern General Hospital and city-based Junk It which specialises in home and office clearances and diverts up to 75% waste away from landfill.
Other potential winners from Glasgow are Freshlink Foods which produces 60 varieties of frozen sausage and PR Print & Design which operates in a environmentally friendly factory, as well as construction company City Building.
Petrie Fine Foods of Fenwick, East Ayrshire, which makes handmade, vegetarian and gluten free products is also up for a gong along with Cumbernauld-based CMS Enviro Systems which manufactures and installs PVCu, aluminium and timber composite windows, doors.
Judges have visited all 29 companies which have made a shortlist ahead of the awards ceremony in Edinburgh next month.
VIBES chairwoman Gillian Bruce said: "The VIBES Awards recognise companies which have taken significant steps to improve or reduce their impact on the environment.
"We are delighted at the diverse and high calibre range of entries we have received this year.
"Every year it becomes more challenging to make the shortlist with firms developing and implementing innovative new ways to reduce their impact on the environment and often saving money as a result.
"Our shortlisted companies have impressed the judges with their sustainable practices and dedication to the environment and we look forward to celebrating each of them at the awards ceremony on November 29."
The Scottish Government is sponsoring the event.
Energy Minister Fergus Ewing said: "The Energy Award encourages businesses to use innovative energy efficiency solutions, recognises the benefits of energy saving measures, acts as a source of inspiration to others and congratulates Scotland's most environmentally-friendly businesses."
