  We present quantum control techniques to engineer flat bands of
symmetry-protected Majorana edge modes in s-wave superconductors. Specifically,
we show how periodic control may be employed for designing time-independent
effective Hamiltonians, which support $Floquet$ $Majorana$ $flat$ $bands$,
starting from equilibrium conditions that are either topologically trivial or
only support individual Majorana pairs. In the first approach, a suitable
modulation of the chemical potential simultaneously induces Majorana flat bands
and dynamically $activates$ a pre-existing chiral symmetry which is responsible
for their protection. In the second approach, the application of effective
parity kicks dynamically $generates$ a desired chiral symmetry by suppressing
chirality-breaking terms in the static Hamiltonian. Our results demonstrate how
the use of time-dependent control enlarges the range of possibilities for
realizing gapless topological superconductivity, potentially enabling access to
topological states of matter that have no known equilibrium counterpart.
