Schwalger is joined in the forwards by Ross Filipo, who gets his first start for the year. Nick Crosswell and Sam Cane (Bay of Plenty) will be starting flankers with Liam Messam moving to No 8 and Augustine Pulu at halfback.
Last week's centurion Tanerau Latimer is out with an achilles strain but the Chiefs lose nothing with All Blacks flanker Cane busting to make an impression with the England series looming in June.
Tevita Koloamatangi comes onto the bench and is joined by halfback Brad Weber and veteran Dwayne Sweeney, who has re-joined the Chiefs after two years playing in Japan. James Lowe returns from a knee injury to take his place on the bench.
Bay of Plenty tighthead prop Josh Hohneck has had limited game time but has impressed with his scrummaging when he has been on the pitch. He will be on the bench again on Friday.
Chiefs' head coach Dave Rennie says the ANZAC Day fixture means so much to everyone involved in the match.
"It is special to be playing a match against an Australian team on ANZAC Day. It is a hugely important day for our two countries."
Chiefs team to face the Brumbies at Canberra Stadium, tomorrow , 7.40pm (NZ time): 1. Pauliasi Manu, 2. Mahonri Schwalger, 3. Ben Tameifuna, 4. Ross Filipo, 5. Brodie Retallick, 6. Nick Crosswell, 7. Sam Cane (Bay of Plenty), 8. Liam Messam (c), 9. Augustine Pulu, 10. Gareth Anscombe, 11. Asaeli Tikoirotuma, 12. Bundee Aki, 13. Andrew Horrell, 14. Tim Nanai-Williams, 15. Tom Marshall, 16. Nathan Harris (Bay of Plenty), 17. Jamie Mackintosh, 18. Josh Hohneck (Bay of Plenty), 19. Matt Symons, 20. Tevita Koloamatangi, 21. Brad Weber, 22. Dwayne Sweeney, 23. James Lowe.